by Patti Barrett, Jet Propulsion Laboratory
by Patti Barrett, Jet Propulsion Laboratory
The following CEOS datafile definitions apply only to SIR-C CEOS products. The X-SAR CEOS products are similar to this definition, but not the same.
Key for Sources:
PF Values found in Parameter File
QA_PARM Values found in QA Parameter File
QA_PLOT Values found in QA Plot Data File
CAL_QA Values found in Calibration QA Parameter File
RCF Values found in Radiometric Compensation File
DWP Values found in Data Window Position File
RGF Values found in Receiver Gain File
CONST Values found in Constant File
EPH Values found in Ephemeris File
RAF Values found in Roll Angle File
POLCAL Values found in Polarimetric Calibration File
COMM Text found in QA Comments Log File
OPS Values derived by OPS software
xxx/OPS Values derived by OPS and xxx
--- Values filled in with blanks (spaces)
RDC Values filled in by Radar Data Center
List of CEOS Files used by SIR-C:
Volume Directory File
Volume Descriptor Record
File Pointer Record -SAR Leader File
File Pointer Record - Imagery Options File
File Pointer Record - SAR Trailer File
Text Record
SAR Leader File
File Descriptor Record
Data Set Summary Record
Map Projection Data Record
Platform Position Record
Attitude Data Record
Radiometric Data Record
Radiometric Compensation Record
Data Quality Summary Record
Data Histograms Record
Range Spectra Record
Radar Parameter Update Data Record
Detailed Processing Parameter Data Record
Calibration Data Record
Imagery Options File
File Descriptor Record
Imagery Options File (Image Data Records or Reformatted Signal Data Records)
SAR Trailer File
File Descriptor Record
Null Volume Directory File
Null Volume Descriptor Record
BFPQ Block Floating Point Quantizer
BIL Band Interleaved by Line tape organizational method:
Volume Directory File
SAR Leader File
Imagery Options File
Data Set 1
Data Set 2
Data Set n
SAR Trailer File
Null Volume Directory File
BIP Band Interleaved by Pixel tape organizational method:
same as BIL
BSQ Band Sequential tape organizational method:
Volume Directory File
SAR Leader File 1
Imagery Options File 1
SAR Trailer File 1
SAR Leader File 2
Imagery Options File2
SAR Trailer File 2
Null Volume Directory File
BSQ is the organization SIR-C will use.
FIXD Fixed length record
IMOP Imagery Options: Class of file in SAR logical volume
MBAA Mixed Binary And Ascii
MLC Multi-Look Complex Image
MLD Multi-Look Detected Image
RSD Reformatted Signal Data
SARL SAR Leader file: Class of file in SAR logical volume
SART SAR Trailer file: Class of file in SAR logical volume
SLC Single-Look Complex Image
VARE Variable record length
$ space character
Every data record begins with a 12-byte preamble which contains general information describing the data file including record type, subtype, and record length. The preamble is included in the definition of each record below.
For SIR-C, each logical volume is one physical volume. Logical volumes do not span multiple physical volumes.
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number (1)
2 5 B1 RDC --- 1st record subtype code (192)
3 6 B1 RDC --- Record type code (192)
4 7 B1 RDC --- 2nd record subtype code (18)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B4 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag ("A$")
8 15-16 A2 --- --- Blanks
9 17-28 A12 RDC --- Format control document ("CCB-CCT-0002")
10 29-30 A2 RDC --- Format control document version (for original: "A$", next: "B$", etc.)
11 31-32 A2 RDC --- Record format revision level (for original: "A$", next: "B$", etc.)
12 33-44 A12 RDC --- CEOS Writer (RDC version) Software release and revision level
13 45-60 A16 RDC --- Physical tape id
14 61-76 A16 RDC --- Logical volume id
15 77-92 A16 RDC --- Volume set id ("SITE$ID$$$$$$$$")
16 93-94 I2 RDC --- Total number of physical volumes in logical volume(1)
17 95-96 I2 RDC --- 1st physical volume sequence number (1)
18 97-98 I2 RDC --- Last physical volume sequence number (1)
19 99-100 I2 RDC --- This physical volume sequence number (1)
20 101-104 I4 RDC --- 1st reference file in volume (1)
21 105-108 I4 RDC --- Logical volume in set (1)
22 109-112 I4 RDC --- Logical volume number in physical volume (1)
23 113-120 A8 RDC --- Tape creation date (YYYYMMDD)
24 121-128 A8 RDC --- Tape creation time (hhmmssdd)
25 129-140 A12 RDC --- Creating country ("USA$$$$$$$$$")
26 141-148 A8 RDC --- Creating agency ("NASA$$$$")
27 149-160 A12 RDC --- Creating facility ("JPL$$$$$$$$$")
28 161-164 I4 RDC --- Number of pointer records
29 165-168 I4 RDC --- Number of records
30 169-260 A92 RDC --- CEOS Reader (RDC version) Software release and revision level
31 261-360 A100 --- --- Spare
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number (2)
2 5 B1 RDC --- 1st record subtype code (219)
3 6 B1 RDC --- Record type code (192)
4 7 B1 RDC --- 2nd record subtype code (18)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B4 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag ("A$")
8 15-16 A2 --- --- Blank
9 17-20 I4 RDC --- File number (1)
10 21-36 A16 RDC --- File name
11 37-64 A28 RDC --- File class ("SARLEADER$FILE$$$$$$$$$$$$$$")
12 65-68 A4 RDC --- File class code ("SARL")
13 69-96 A28 RDC --- Data type ("MIXED$BINARY$AND$ASCII$$$$$$")
14 97-100 A4 RDC --- Data type code ("MBAA")
15 101-108 I8 RDC --- Number of records
16 109-116 I8 RDC --- 1st record length
17 117-124 I8 RDC --- Max record length
18 125-136 A12 RDC --- Record type ("VARIABLE$LEN")
19 137-140 A4 RDC --- Record type code ("VARE")
20 141-142 I2 RDC --- Start file volume number
21 143-144 I2 RDC --- End file volume number
22 145-152 I8 RDC --- First record number on tape
23 153-160 I8 RDC --- Last record number on tape
24 161-260 A100 --- --- Blank
25 261-360 A100 --- --- Blank
Volume Directory File:
File Pointer Record - Imagery Options
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number (3)
2 5 B1 RDC --- 1st record subtype code (219)
3 6 B1 RDC --- Record type code (192)
4 7 B1 RDC --- 2nd record subtype code (18)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B1 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag ("A$")
8 15-16 A2 --- --- Blank
9 17-20 I4 RDC --- File number (2)
10 21-36 A16 RDC --- File name
11 37-64 A28 RDC --- File class ("IMAGERY$OPTIONS$FILE$$$$$$$$")
12 65-68 A4 RDC --- File class code ("IMOP")
13 69-96 A28 RDC --- Data type ("MIXED$BINARY$AND$ASCII$$$$$$")
14 97-100 A4 RDC --- Data type code ("MBAA")
15 101-108 I8 RDC --- Number of records
16 109-116 I8 RDC --- 1st record length
17 117-124 I8 RDC --- Max record length
18 125-136 A12 RDC --- Record type ("FIXED$LENGTH)
19 137-140 A4 RDC --- Record type code ("FIXD")
20 141-142 I2 RDC --- Start file volume number
21 143-144 I2 RDC --- End file volume number
22 145-152 I8 RDC --- First record number on tape
23 153-160 I8 RDC --- Last record number on tape
24 161-260 A100 --- --- Blank
25 261-360 A100 --- --- Blank
Volume Directory File:
File Pointer Record - SAR Trailer File
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number (4)
2 5 B1 RDC --- 1st record subtype code (219)
3 6 B1 RDC --- Record type code (192)
4 7 B1 RDC --- 2nd record subtype code (18)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B4 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag ("A$")
8 15-16 A2 --- --- Blank
9 17-20 I4 RDC --- File number (3)
10 21-36 A16 RDC --- File name
11 37-64 A28 RDC --- File class ("SARTRAILER$FILE$$$$$$$$$$$$$")
12 65-68 A4 RDC --- File class code ("SART")
13 69-96 A28 RDC --- Data type ("MIXED$BINARY$AND$ASCII$$$$$$")
14 97-100 A4 RDC --- Data type code ("MBAA")
15 101-108 I8 RDC --- Number of records
16 109-116 I8 RDC --- 1st record length
17 117-124 I8 RDC --- Max record length
18 125-136 A12 RDC --- Record type ("VARIABLE$LEN")
19 137-140 A4 RDC --- Record type code ("VARE")
20 141-142 I2 RDC --- Start file volume number
21 143-144 I2 RDC --- End file volume number
22 145-152 I8 RDC --- First record number on tape
23 153-160 I8 RDC --- Last record number on tape
24 161-260 A100 --- --- Blanks
25 261-360 A100 --- --- Blanks
Volume Directory File:
The purpose of this record is to allow the reader of the CEOS tape to simply print out a short description of the data
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number
2 5 B1 RDC --- 1st record subtype code (18)
3 6 B1 RDC --- Record type code (63)
4 7 B1 RDC --- 2nd record subtype code (18)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B4 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag ("A$")
8 15-16 A2 --- --- Continuation flag ("$$") for "not continued"
9 17-56 A40 PF/RDC pdata_product
pspecial_product
Product type specifier ("MULTI-LOOK DETETCTED",etc.)
10 57-116 A60 RDC --- Location, date/time of CEOS product creation ("PRODUCED AT JPL/NASA/USA ON 1994/01/16 11:45:00"
11 117-156 A40 RDC --- Physical volumes identification ("TAPE$ID:$xxxxxxxxxxxxxxxx,$TAPE$1$OF$1") where xxx...x is the tape ID
12 157-196 A40 PF/RDC pdatatake_id Site identification ("DTxxx.yy$YYYY/MM/DD hh:mm:ss.ttt") where xxx.yy is the datatake ID and YY::tt - frame center, acquisition date and time
13 197-236 A40 PF/RDC pcenter_lat
pcenter_long
pgec_center_lat
pgec_center_long Site location ("FRAME$CENTER: nnndegnn.n'P nnndegnn.n'Q") where P = N or S latitude, Q = E or W longitude
14 237-256 A20 --- --- Spares
15 257-360 A104 --- --- Spares
SAR Leader File:
The File Descriptor Record is defined below.
Field Bytes Format Source Parameter Description
FIXED LENGTH RECORD SEGMENT
1 1-4 B4 OPS --- Record sequence number (1)
2 5 Bl OPS --- 1st rec.subtype code (63)
3 6 Bl OPS --- Record type code (192)
4 7 Bl OPS --- 2nd rec.subtype code (18)
5 8 Bl OPS --- 3rd rec.subtype code (18)
6 9-12 B4 OPS --- Record length (720)
7 13-14 A2 OPS --- ASCII flag("A$")
8 15-16 A2 --- --- Blank
9 17-28 A12 OPS --- Format control document ("CEOS-SAR-CCT")
10 29-30 A2 OPS --- Format control document version ("A$")
11 31-32 A2 OPS --- Record format rev.level ("A$")
12 33-44 A12 OPS --- Software id
13 45-48 I4 RDC --- File number (1)
14 49-64 A16 OPS --- File name (same as field 10 of file pointer record)
15 65-68 A4 OPS --- Record sequence and location type flag ("FSEQ")
16 69-76 I8 OPS --- Sequence number location (1)
17 77-80 I4 OPS --- Sequence number field length (4)
18 81-84 A4 OPS --- Record code and location type flag ("FTYP")
19 85-92 I8 OPS --- Record code location (5)
20 93-96 I4 OPS --- Record code field length (4)
21 97-100 A4 OPS --- Record length and location type flag ("FLGT")
22 101-108 I8 OPS --- Record length location (9)
23 109-112 I4 OPS --- Record length field length (4)
24 113 Al --- --- Blank
25 114 Al --- --- Blank
26 115 Al --- --- Blank
27 116 Al --- --- Blank
28 117-180 A64 OPS --- CEOS Reader (OPS version) Software release and revision level
VARIABLE SEGMENT CONTENTS
29 181-186 I6 OPS --- Number of data set summary records (1)
30 187-192 I6 OPS --- Record length (2016)
31 193-198 I6 OPS --- Number of map projection data records (1)
32 199-204 I6 OPS --- Record length (1620)
33 205-210 I6 OPS --- Number of platform position data records (1)
34 211-216 I6 OPS --- Record length (variable)
35 217-222 I6 OPS --- Number of attitude data records (1)
36 223-228 I6 OPS --- Record length (variable)
37 229-234 I6 OPS --- Number of radiometric data records (one per polarization channel)
38 235-240 I6 OPS --- Record length (144)
39 241-246 I6 OPS --- Number of radiometric compensation records (one per polarization channel)
40 247-252 I6 OPS --- Record length (variable)
41 253-258 I6 OPS --- Number of data quality summary records (one per polarization channel)
42 259-264 I6 OPS --- Record length (464)
43 265-270 I6 OPS --- Number of data histogram records (one per polarization channel)
44 271-276 I6 OPS --- Record length (variable)
45 277-282 I6 OPS --- Number of range spectra records (one per polarization channel)
46 283-288 I6 OPS --- Record length (variable)
47 289-294 I6 OPS --- Number of digital elevation model descriptor records (0)
48 295-300 I6 OPS --- Record length (0)
49 301-306 I6 OPS --- Number of radar parameter update records (variable: one for DWP and one per polarization for receiver gain)
50 307-312 I6 OPS --- Record length (variable)
51 313-318 I6 OPS --- Number of annotation data records (0)
52 319-324 I6 OPS --- Record length (0)
53 325-330 I6 OPS --- Number of detailed processing records (1)
54 331-336 I6 OPS --- Record length (1312)
55 337-342 I6 OPS --- Number of calibration data records (1)
56 343-348 I6 OPS --- Record length (776)
57 349-354 I6 OPS --- Number of ground control points descriptor records (0)
58 355-360 I6 OPS --- Record length (0)
59 361-366 I6 --- --- Blanks
60 367-372 I6 --- --- Blanks
61 373-378 I6 --- --- Blanks
62 379-384 I6 --- --- Blanks
63 385-390 I6 --- --- Blanks
64 391-396 I6 --- --- Blanks
65 397-402 I6 --- --- Blanks
66 403-408 I6 --- --- Blanks
67 409-414 I6 --- --- Blanks
68 415-420 I6 --- --- Blanks
69 421-426 I6 OPS --- Number of facility data records (0)
70 427-432 I6 OPS --- Record length (0)
71 433-720 A288 COMM --- Comments from Q/A operator
SAR Leader File:
The Data Set Summary Record is defined as follows:
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Record Sequence Number (2)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (10)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record = 2016 (2014 + 2 for word boundary padding)
7 13-16 I4 OPS --- Data set Summary Record sequence number (1)
8 17-20 I4 PF/OPS ppolarization
pfrequency SAR channel indicator(XVV: 00, LVV_LHV: 10, LHH: 11, LHV: 12, LVV: 13, LVH: 14, Lquad: 15, LHH&LHV: 16, LVH&LVV: 17, LHH&LVV: 18, LHH_LVH: 19, CVV&CHV: 20, CHH: 21, CHV: 22, CVV: 23, CVH: 24, Cquad: 25, CHH&CHV: 26, CVH&CVV: 27, CHH&CVV: 28, CHH&CVH: 29)
SCENE PARAMETERS
9 21-36 A16 PF psite_id Site identifier (3-letter ID)
10 37-68 A32 PF psite_name Site name (English name)
11 69-100 A32 PF/OPS pmet_image_start
pgmt_0met
pimage_duration Scene GMT center time (YYYY/MM/DD hh:mm:ss.ttt) where:
YYYY = year
MM = month
DD = day
hh = hours (00 to 23)
mm = minutes (00 to 59)
ss = seconds (00 to 59)
ttt = milliseconds (000 to 999)
12 101-116 A16 PF/OPS pmet_image_start
pimage_duration Scene MET center time (DD hh:mm:ss.ttt)
13 117-132 F16.7 PF pcenter_lat
pgec_center_lat Processed scene center geodetic latitude defined as positive to the north of the equator and negative to the south (degrees)
14 133-148 F16.7 PF pcenter_long
pgec_center_long Processed scene center geodetic longitude defined as positive to the east of the prime meridian and negative to the west.(degrees)
15 149-164 F16.7 PF ptrack_angle Processed Scene Center true heading as calculated relative to true North (degrees): Track angle at scene center
16 165-180 A16 PF pearth_model
pspheroid Ellipsoid designator
17 181-196 F16.7 PF pmajor_earth_radius
pgec_semi_major_axis Ellipsoid semimajor axis (km)
18 197-212 F16.7 PF/OPS pminor_earth_radius
pgec_semi_major_axis Ellipsoid semiminor axis (km)
19 213-228 F16.7 --- Gravitational parameter
20 229-244 A16 --- Spare
21 245-260 F16.7 --- Ellipsoid J2 parameter
22 261-276 F16.7 --- Ellipsoid J3 parameter
23 277-292 F16.7 --- Ellipsoid J4 parameter
24 293-308 F16.7 PF pterrain_height Average terrain height above Ellipsoid at scene center (meters)
25 309-324 F16.7 PF/OPS pdigital_lines
ptotal_rg_lines
pgec_lines Scene center line number (the line number at the scene center including zero fill)
26 325-340 F16.7 PF/OPS pdigital_pixels
pprfc_samp
pgec_pixels Scene center pixel number (the pixel number at the scene center including zero fill)
27 341-356 F16.7 PF pimage_size
pgec_size_y Processed scene length (km) including zero fill
28 357-372 F16.7 PF pswath_width
pgec_size_x Processed scene width (km) including zero fill
39 373-380 A8 --- Spare
30 381-388 A8 --- Spare
31 389-392 I4 PF/OPS ppolarization Number of SAR polarization channels
32 393-396 A4 --- Spare
33 397-412 A16 PF/OPS pspacecraft_id Sensor platform mission identifier (this field identifies the platform for the sensor that transmitted the SAR data: "STS-059$$$$$$$$$" for SIR-C)
34 413-444 A32 PF/OPS psar_system,
pfrequency,
ppulse_bandwidth,
pradar_mode,
ppolarization Sensor ID: and mode of operation for this channel: (this field specifies the sensor and its mode of operation in the form of: <AAAAAA-BB-CCDD-EEFF$$$$$$$$$$$$$>, where:
AAAAAA= six character sensor ID
(SIR-C, X-SAR)
BB = SAR band (X$, L$, C$)
CC = code for resolution mode
(HIgh = 40 MHz, MeDium = 20 MHz, LOw = 10 MHz)
DD = SIR-C data acquisition mode ID
(eg: mode 0 to 23)
EE = transmit polarization (H$, V$, or HV)
FF = receive polarization (H$, V$, or HV)
35 445-452 A8 PF pdatatake_id Data take ID
36 453-460 F8.3 PF pnadir_lat_scene_ctr Sensor Platform geodetic Latitude at nadir corresponding to Scene Center (degrees)
37 461-468 F8.3 PF pnadir_long_scene_ctr Sensor Platform geodetic Longitude at nadir corresponding to Scene Center (degrees)
38 469-476 F8.3 PF pnadir_trk_ang_scene_ctr Sensor Platform Heading at nadir corresponding to Scene Center (degrees)
39 477-484 F8.3 PF/OPS pleft_right_looking Left/Right looking flag (Left Looking: -90, Right Looking: +90)
40 485-492 F8.3 PF pincidence_angle Incidence angle at scene center as derived from sensor platform orientation, electronic boresight and Earth geometry (degrees)
41 493-500 F8.3 PF/OPS pcarrier_freq Radar Frequency (GHz)
42 501-516 F16.7 PF pwavelength Radar wavelength (meters)
43 517-518 A2 OPS --- Motion compensation indicator 00 = no compensation
44 519-534 A16 PF/OPS pchirp_type Range pulse code specifier ("DIGITAL$CHIRP")
45 535-550 F16.7 --- --- Range pulse amplitude coefficient #l (Chirp =range chirp constant term (offset from DC))
46 551-566 F16.7 --- --- Range pulse amplitude coefficient #2 (Chirp =range chirp linear term)
47 567-582 F16.7 --- --- Range pulse amplitude coefficient #3 (quadratic.term)
48 583-598 F16.7 --- --- Range pulse amplitude coefficient #4 (cubic term)
49 599-614 F16.7 --- --- Range pulse amplitude coefficient #5 (quartic term)
50 615-630 F16.7 --- --- Range pulse phase coefficient #l (offset in radians)
51 631-646 F16.7 PF prg_chirp_start_freq Range chirp start frequency (MHz)
52 647-662 F16.7 PF prg_chirp_rate Range chirp rate (MHz/msec)
53 663-678 F16.7 --- --- Range pulse phase coefficient #4 (cubic term)
54 679-694 F16.7 --- --- Range pulse phase coefficient #5 (quadratic term)
55 695-702 I8 --- --- Down linked data chirp extraction index (in samples)
56 703-710 A8 --- --- Spare
57 711-726 F16.7 PF pcmplx_samp_rate Range complex sampling rate (MHz)
58 727-742 F16.7 PF pecho_delay_time Range gate at near edge at the start of the image (one-way echo delay time)(msec)
59 743-758 F16.7 PF ppulse_duration Range pulse length (msec)
60 759-762 A4 OPS --- Base band conversion flag (YES$)
61 763-766 A4 PF/OPS pdata_product Range compressed flag (YES$/NO$$) (NO for reformatted signal data, YES = for all others)
62 767-782 F16.7 PF/OPS phh_receiver_gain,
pvv_receiver_gain,
ppolarization Receiver gain for like polarized at early edge at the start of the image (dB)
63 783-798 F16.7 PF/OPS phv_receiver_gain,
pvh_receiver_gain,
ppolarization Receiver gain for cross polarized at early edge at the start of the image(dB)
64 799-806 I8 PF pbits_per_sample Quantization in bits per channel (4-bit: 4, 8-bit: 8, BFPQ: 8)
65 807-818 A12 PF/OPS pquantization Quantizer descriptor (BFPQ: "(8,4)BFPQ$$$", if 4-bit or 8-bit "UNIFORM$$$$$")
66 819-834 F16.7 --- --- DC Bias for I-component
67 835-850 F16.7 --- --- DC Bias for Q-component
68 851-866 F16.7 --- --- Gain imbalance for I & Q
69 867-882 F16.7 --- --- Spare
70 883-898 F16.7 --- --- Spare
71 899-914 F16.7 PF plook_angle Antenna electronic boresight relative to platform vertical axis at the scene cemter (degrees) (positive to the right; negative to the left)
72 915-930 F16.7 PF pmech_ant_boresight Antenna mechanical boresight relative to platform vertical axis at the start of the image, positive to the right, negative to the left (degrees)
73 931-934 A4 PF/OPS pnull_line Echo tracker-on/off designator ("ON$$" or "OFF$")
74 935-950 F16.7 PF pprfc Nominal PRF (Hz)
75 951-966 F16.7 PF prange_beamwidth Effective two-way antenna elevation 6 dB beam width at boresight (degrees)
76 967-982 F16.7 PF paz_beamwidth Effective two-way antenna azimuth 6 dB beam width at electronic boresight (degrees)
SENSOR SPECIFIC PARAMETERS
77 983-998 I16 --- --- (Satellite encoded binary time code)
78 999-1030 A32 --- --- (Satellite clock time, (YYYYMMDDhhmmssttt$$$...)
79 1031-1038 I8 --- --- Satellite clock increment (nano-secs))
80 1039-1046 A8 --- --- Spare
GENERAL PROCESSING PARAMETERS
81 1047-1062 A16 OPS --- Processing facility identifier ("JPL$$$$$$$$$$$$$")
82 1063-1070 A8 PF phw_version Processing system identifier (hardware configuration)
83 1071-1078 A8 PF psw_version Processing version identifier (software version)
84 1079-1094 A16 --- --- Processing facility process code
85 1095-1110 A16 PF/OPS pdata_product
pspecial_product Product level code (Reformatted Signal Data: "0.0$$$...",, SLC: "1.0$$$...", MLD, MLC: "1.5$$$...", Geocoded data products: "1.7$$$...", )
86 1111-1142 A32 PF/OPS pdata_product
pspecial_product Product type specifier ("MULTI-LOOK$DETECTED$$$...", "MULTI-LOOK$COMPLEX$$$...", "SINGLE-LOOK$COMPLEX$$$...", "REFORMATTED$SIGNAL$DATA$$$...", "GEOCODED$ELLIPSE$CORRECTED$$$...", "GEOCODED$TERRAIN$CORRECTED$$$...")
87 1143-1174 A32 PF/OPS pdata_product
pspecial_product Processing algorithm identifier (MLD, MLC, SLC:"FREQUENCY$DOMAIN$CONVOLUTION", RSD: "NONE", GEC,GTC: "GEOCODED$ELLIPSOID$CORRECTED")
88 1175-1190 F16.7 PF pnum_looks Total number of looks
89 1191-1206 F16.7 --- --- Nominal effective number of Range looks
90 1207-1222 F16.7 --- --- Bandwidth per look in Azimuth ( Hz )
91 1223-1238 F16.7 --- --- Bandwidth per look in Range ( Hz )
92 1239-1254 F16.7 PF ppbw Total processor bandwidth in Azimuth (Hz)
93 1255-1270 F16.7 PF ppulse_bandwidth Total processor bandwidth in Range (MHz)
94 1271-1302 A32 PF/OPS paz_data_weighting Weighting function designator in Azimuth (if weighting flag is on: "COS$SQUARE$PLUS$n.nn$$PEDESTAL$HT", else: "NONE$$$..."
95 1303-1334 A32 PF/OPS prg_data_weighting Weighting function designator in Range (if weighting flag is on: COS$SQUARE$PLUS$n.nn$PEDESTAL$HT", else: "NONE$$$..."
96 1335-1350 A16 PF phddc_id HDDC identifier
97 1351-1366 F16.7 PF ML : ppost_rg_res
SLC: ppre_rg_res
RDC: none Nominal resolution equal to 3dB points in ground range (m)
98 1367-1382 F16.7 PF ML : ppost_az_res
SLC: ppre_az_res
RDC: none Nominal resolution equal to 3dB in Azimuth (m)
99 1383-1398 F16.7 PF pnoise_gain Processor gain for noise data
100 1399-1414 F16.7 OPS --- Linear radiometric conversion factor (1)
101 1415-1430 F16.7 --- --- Along track Doppler frequency constant term at early edge of image (Hz)
102 1431-1446 F16.7 --- --- Along track Doppler frequency linear term relative to early edge of the image (Hz/pixel)
103 1447-1462 F16.7 --- --- Along track Doppler frequency quadratic term relative to early edge of the image (Hz/pixel/pixel)
104 1463-1478 A16 --- --- Spare
105 1479-1494 F16.7 --- --- Cross track Doppler frequency constant term at near edge of the image (Hz)
106 1495-1510 F16.7 --- --- Cross track Doppler frequency linear term relative to near edge of the image (Hz/pixel)
107 1511-1526 F16.7 --- --- Cross track Doppler frequency quadratic term relative to near edge of the image (Hz/pixel/pixel)
108 1527-1534 A8 OPS --- Time direction indicator along pixel direction ("INCREASE"-ing)
109 1535-1542 A8 OPS --- Time direction indicator along line direction ("INCREASE"-ing)
110 1543-1558 F16.7 --- --- Along track Doppler frequency rate constant term at early edge of the image (Hz/sec)
111 1559-1574 F16.7 --- --- Along track Doppler frequency rate linear term relative to early edge of the image (Hz/sec/pixel)
112 1575-1590 F16.7 --- --- Along track Doppler frequency rate quadratic term relative to early edge of the image (Hz/sec/pixel/pixel)
113 1591-1606 A16 --- --- Spare
114 1607-1622 F16.7 --- --- Cross track Doppler frequency rate constant term at near edge of the image (Hz/sec)
115 1623-1638 F16.7 --- --- Cross track Doppler frequency rate linear term relative to near edge of the image (Hz/sec/pixel)
116 1639-1654 F16.7 --- --- Cross track Doppler frequency rate quadratic term relative to near edge of the image (Hz/sec/pixel/pixel)
117 1655-1670 F16.7 PF phh_delay HH channel electronic delay time (RSD product only) (micro seconds)
118 1671-1678 A8 OPS --- Line content indicator ("RANGE$$$" or "EASTING$" if geocoded image)
119 1679-1682 A4 PF/OPS pdata_product Clutter lock applied flag (MLD, MLC, SLC: "YES$", RSD: "NONE")
120 1683-1686 A4 PF/OPS pdata_product Autofocussing applied flag (MLD, MLC, SLC: "YES$", RSD: "NONE")
121 1687-1702 F16.7 PF paz_spacing
pgec_pixel_spacing Line spacing (m)
122 1703-1718 F16.7 PF prg_spacing
pgec_pixel_spacing Pixel spacing (m)
123 1719-1734 A16 PF/OPS pchirp_type Processor range compression designator("DIGITAL$CHIRP", "ANALYTIC$CHIRP", or "MEASURED$CHIRP")
124 1735-1750 A16 PF/OPS ptrack_angle Orbit direction at image center ("ASCENDING$$$$$$$" OR "DESCENDING$$$$$$")
125 1751-1766 A16 --- Spare
SENSOR SPECIFIC LOCAL USE SEGMENT
126 1767-1886 A120 --- Spares
PROCESSOR SPECIFIC LOCAL USE SEGMENT
127 1887-2006 A120 --- Spares
IMAGE ANNOTATION FIELDS
128 2007-2014 I8 OPS Number of Annotation Points (0)
129 2015-2016 A2 --- Spare
SAR Leader File:
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (3)
2 5 Bl OPS --- lst record subtype code (10)
3 6 B1 OPS --- Record type code (20)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 B1 OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (1620)
7 13-28 A16 --- --- Spare
8 29-60 A32 PF/OPS pdata_product
pspecial_product
pmap_projection Map projection descriptor (MLD, MLC: "GROUND$RANGE$$$...", SLC, RSD: "SLANT$RANGE$$$...", GEC, GTC: "UTM", "SSMI", or "UPS")
9 61-76 I16 PF pdigital_pixels
pprfc_samp
pgec_pixels Number of pixels per line of image
10 77-92 I16 PF pdigital_lines
ptotal_rg_lines
pgec_lines Number of lines
11 93-108 F16.7 PF prg_spacing
pgec_pixel_spacing Nominal inter-pixel distance in output scene (meters)
12 109-124 F16.7 PF paz_spacing
pgec_pixel_spacing Nominal inter-line distance in output scene (meters)
13 125-140 F16.7 --- --- Orientation at output scene center, for geocoded products this is simply the convergence of the meridians, ie. the angle between geographic north and map grid north (degrees) (Angle of projection axis from true North)
14 141-156 F16.7 --- --- Actual platform orbital inclination (degrees)
15 157-172 F16.7 --- --- Actual ascending node (longitude at equator) (degrees)
16 173-188 F16.7 PF pdistance_scene_ctr Distance of platform at input scene center from the geocenter (km)
17 189-204 F16.7 PF paltitude_geodetic Geodedic altitude of the platform relative to the ellipsoid (km)
18 205-220 F16.7 PF pnadir_spd_scene_ctr Actual ground speed at nadir at input scene center time (km/sec)
19 221-236 F16.7 PF pnadir_trk_ang_scene_ctr Platform heading (degrees): effective subplatform track direction angle relative to true north, including the effects of orbital inclination and skew due to earth rotation.
PROJECTION ELLIPSOID PARAMETERS
20 237-268 A32 PF pearth_model
pspheroid Name of reference ellipsoid (e.g. GEM 10B)
21 269-284 F16.7 PF pmajor_earth_radius
pgec_semi_major_axis Semimajor axis of ref. ellipsoid (km)
22 285-300 F16.7 PF/OPS pminor_earth_radius
pgec_semi_major_axis Semiminor axis of ref. ellipsoid (km)
23 301-316 F16.7 PF poffset_x Datum shift parameter referenced to Greenwich. dx (meters)
24 317-332 F16.7 PF poffset_y Datum shift parameter perpendicular to Greenwich. dy (meters)
25 333-348 F16.7 PF poffset_z Datum shift parameter direction of the rotation axis. dz (meters)
26 349-364 F16.7 --- --- Additional datum shift parameter 1st rotation angle
27 365-380 F16.7 --- --- Additional datum shift parameter 2nd rotation angle
28 381-396 F16.7 --- --- Additional datum shift parameter 3rd rotation angle
29 397-412 F16.7 PF pgec_center_scale_factor Scale factor of reference ellipsoid
MAP PROJECTION DESIGNATOR
30 413-444 A32 PF pmap_projection Alphanumeric description of map projection
UTM-PROJECTION (1ST DEFAULT)
31 445-476 A32 PF/OPS pmap_projection UTM descriptor
32` 477-480 A4 PF pzone_number Signature of the UTM zone
33 481-496 F16.7 OPS --- Map origin (false easting: 500,000 m)
34 497-512 F16.7 PF/OPS pgec_center_lat Map origin (false northing: 0 m if northern hemisphere, 10,000,000 m if southern hemisphere)
35 513-528 F16.7 PF/OPS pzone_number Center of projection longitude (degrees)
36 529-544 F16.7 --- --- Center of projection latitude (degrees)
37 545-560 F16.7 --- --- 1st standard parallel (degrees)
38 561-576 F16.7 --- --- 2nd standard parallel (degrees)
39 577-592 F16.7 OPS --- Scale factor
UPS-PROJECTION (2ND DEFAULT)
40 593-624 A32 PF/OPS pmap_projection UPS descriptor
41 625-640 F16.7 --- --- Center of projection longitude (degrees)
42 641-656 F16.7 --- --- Center of projection latitude (degrees)
43 657-672 F16.7 --- --- Scale factor
NATIONAL SYSTEMS PROJECTION (any others, especially SSMI)
44 673-704 A32 PF/OPS pmap_projection Projection descriptor
45 705-720 F16.7 --- --- Map origin (false easting)
46 721-736 F16.7 --- --- Map origin (false northing)
47 737-752 F16.7 --- --- Center of projection longitude (degrees)
48 753-768 F16.7 --- --- Center of projection latitude (degrees)
49 769-784 F16.7 --- --- Standard parallels (deg, default: -9999.99)
50 785-800 F16.7 --- --- Standard parallels (deg, default: -9999.99)
51 801-816 F16.7 --- --- Standard parallels (deg, default: -9999.99)
52 817-832 F16.7 --- --- Standard parallels (deg, default: -9999.99)
53 833-848 F16.7 --- --- Central meridian (deg, default: -9999.99)
54 849-864 F16.7 --- --- Central meridian (deg, default: -9999.99)
55 865-880 F16.7 --- --- Central meridian (deg, default: -9999.99)
56 881-896 A16 --- --- Spares
57 897-912 A16 --- --- Spares
58 913-928 A16 --- --- Spares
59 929-944 A16 --- --- Spares
COORDINATES OF FOUR CORNER POINTS
60 945-960 F16.7 PF ptop_left_lat Top left corner northing (meters)
61 961-976 F16.7 PF ptop_left_long Top left corner easting (meters)
62 977-992 F16.7 PF ptop_right_lat Top right corner northing (meters)
63 993-1008 F16.7 PF ptop_right_long Top right corner easting (meters)
64 1009-1024 F16.7 PF pbottom_right_lat Bottom right corner northing (meters)
65 1025-1040 F16.7 PF pbottom_right_long Bottom right corner easting (meters)
66 1041-1056 F16.7 PF pbottom_left_lat Bottom left corner northing (meters)
67 1057-1072 F16.7 PF pbottom_left_long Bottom left corner easting (meters)
68 1073-1088 F16.7 PF pnear_early_lat Near range early time latitude (degrees)
69 1089-1104 F16.7 PF pnear_early_long Near range early time longitude (degrees)
70 1105-1120 F16.7 PF pfar_early_lat Far range early time latitude (degrees)
71 1121-1136 F16.7 PF pfar_early_long Far range early time longitude (degrees)
72 1137-1152 F16.7 PF pfar_late_lat Far range late time latitude (degrees)
73 1153-1168 F16.7 PF pfar_late_long Far range late time longitude (degrees)
74 1169-1184 F16.7 PF pnear_late_lat Near range late time latitude (degrees)
75 1185-1200 F16.7 PF pnear_late_long Near range late time longitude (degrees)
76 1201-1216 F16.7 --- --- Top left corner terrain height relative to ellipsoid (meters)
77 1217-1232 F16.7 --- --- Top right corner terrain height (meters)
78 1233-1248 F16.7 --- --- Bottom right corner height (meters)
79 1249-1264 F16.7 --- --- Bottom left corner height (meters)
COEFFS. FOR IMAGE TO MAP TO IMAGE CONVERSION
80-87 1265-1424 8E20.10 PF/OPS ptop_left_long
pgec_pixel_spacing
ptop_left_lat Eight coefficients (A11, A12,...,A24) to convert a line (L) and pixel (P) position to the map projection frame of reference, say (E,N) where:
E = A11 + A12 + A13 + A14TL
N = A21 + A22 + A23 + A24nP
88-95 1425-1584 8E20.10 PF/OPS ptop_left_long
pgec_pixel_spacing Eight coefficients (B11, B12,...,B24) to convert from the map projection (E,N) to line (l) and pixel (P) position in the image, say (L,P) where:
--- L = B11 + B12 + B13 + B144ETN
--- P = B21 + B22TE + B23TN
96 1585-1620 A36 --- --- Spares
NOTES for fields 80-95:
Easting = A11 + A12 * line + A13 * column + A14 * line * column
Northing = A21 + A22 * line + A23 * column + A24 * line * column
The inverse is computed by:
Line = B11 + B12 * East + B13 * North + B14 * North * East
Column = B21 + B22 * East + B23 * North + B24 * North * East
Because of the cartesic mapping systems used for UTM and UPS, coefficients A12, A14, A23, A24, B12, B14, B23, B24 are all 0.
SAR Leader File:
The format of the record is defined below. (One record with a variable number of data sets.)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (4)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (30)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 B1 OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-44 A32 --- --- Orbital elements designator
8 45-60 F16.7 --- --- lst orbital element
9 61-76 F16.7 --- --- 2nd orbital element
10 77-92 F16.7 --- --- 3rd orbital element
11 93-108 F16.7 --- --- 4th orbital element
12 109-124 F16.7 --- --- 5th orbital element
13 125-140 F16.7 --- --- 6th orbital element
14 141-144 I4 EPH/OPS --- Number of data sets
15 145-148 I4 EPH/OPS --- Year of data point (YYYY) for first point
16 149-152 I4 EPH/OPS --- Month of data point (MM) for first point
17 153-156 I4 EPH/OPS --- Day of data point (DD) for first point
18 157-160 I4 EPH/OPS --- Days of the year (GMT) for first point
19 161-182 D22.15 EPH/OPS --- Seconds of day (GMT) for first point
20 183-204 D22.15 EPH/OPS --- Time interval between data sets (data points) (sec)
21 205-268 A64 PF/OPS pcoordinate_state Reference coordinate system for state vector and attitude vector ("GREENWHICH$TRUE$OF$DATE" or "EARTH$CENTERED" if geocoded product)
22 269-290 D22.15 CONST paries_hour_angle Angle between +x-axis of coordinate system and the Prime Meridian (degrees)
23 291-306 F16.7 --- --- Along track position error (meters)
24 307-322 F16.7 --- --- Across track position error (meters)
25 323-338 F16.7 --- --- Radial position error (meters/sec)
26 339-354 F16.7 --- --- Along track velocity error (meters/sec)
27 355-370 F16.7 --- --- Across track velocity error (meters/sec)
28 371-386 F16.7 --- --- Radial velocity error (meters/sec)
29 387-388 A2 --- --- Spare
PLATFORM POSITION DATA SET
30 389-454 3D22.15 EPH --- 1st data point (X,Y,Z) position vector (km)
31 455-520 3D22.15 EPH --- 1st data point (X,Y,Z) velocity vector (km/sec)
Repeat fields 29-30 for each record in the ephemeris file.
SAR Leader File:
The Attitude Data Record is defined as follows. (One record with a variable number of data sets.)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (5)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (40)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-16 I4 OPS --- Number of attitude data points (1)
ATTITUDE DATA SET
8 17-20 I4 EPH --- Days of the year at imge center (GMT)
9 21-28 I8 EPH --- Millisecond of day at imge center (GMT)
10 29-32 I4 --- --- Pitch data quality flag
11 33-36 I4 --- --- Roll data quality flag
12 37-40 I4 --- --- Yaw data quality flag
13 41-56 F16.7 EPH --- Pitch (degrees)
14 57-72 F16.7 EPH --- Roll angle (degrees)
15 73-88 F16.7 EPH --- Yaw (degrees)
16 89-92 I4 --- --- Pitch rate data quality flag
17 93-96 I4 --- --- Roll rate data quality flag
18 97-100 I4 --- --- Yaw rate data quality flag
19 101-116 F16.7 --- --- Pitch rate (degrees/sec)
20 117-132 F16.7 --- --- Roll rate (degrees/sec)
21 133-148 F16.7 --- --- Yaw rate (degrees/sec)
22 149-152 A4 --- --- Padding for word byte boundary
Repeat fields 8-22 for each record in the roll angle file.
SAR Leader File:
The radiometric data record is defined below. (One record per polarization channel. For SIR-C implementation, one data set per record.)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (6)
2 5 Bl OPS --- Record subtype code (10)
3 6 Bl OPS --- Record type code (50)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (144)
7 13-16 I4 OPS --- Radiometric data record sequence number (1, 2, ...)
8 17-20 I4 OPS --- Number of radiometric data sets in the record (1)
9 21-24 A4 --- --- Padding for word boundary
RADIOMETRIC DATA SET
10 25-32 I8 OPS --- Radiometric data set size in bytes
11 33-36 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator ("XVV$","LHH$", "LHV$", "LVV$", "LVH$", "CHH$", "CHV$", "CVV$", "CVH$")
12 37-40 A4 --- --- Spare
13 41-64 A24 CAL_QA qcal_date Date of nearest calibration update (yymmdd)
14 65-72 I8 OPS --- Number of samples in the look up table (0)
15 73-88 A16 PF/OPS pdata_product Sample type designator (MLD, MLC: "CROSS$PRODUCTS"; SLC: "SCATTERING$MATRIX"; RSD: "NONE")
Calibration Equation:
<I> = K * s0 + KN(R) * <N>
where
<I> : expectation value of image pixel power
K : absolute calibration constant
KN(R) : noise gain of processor as a function of range R
<N> : raw data noise power per sample
16 89-104 F16.7 PF phh_noise_power
phv_noise_power
pvv_noise_power
pvh_noise_power Raw data noise power estimate (<N>) (data number units)
17 105-120 F16.7 OPS --- Linear conversion factor (backscatter coefficient to image power conversion factor) (K) (1)
18 121-136 F16.7 PF pnoise_gain Processor gain for noise data before radiometric correction is applied. (KN,0)
19 137-140 A4 --- --- Spare
20 141-144 A4 --- --- Padding for word boundary
The CEOS file definition for the Radiometric Data Record includes a variable length look up table following field 20. Since the SIR-C implementaion does not include the look up table, there is only one data set in each Radiometric Data Record and each record is of fixed length.
SAR Leader File:
Radiometric Compensation Record
The radiometric compensation record is defined as follows: (One record per polarization channel)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (7)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (51)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-16 I4 OPS --- Radiometric compensation record sequence number (1)
8 17-20 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator("XVV$", "LHH$", "LHV$", "LVV$", "LVH$", "CHH$", "CHV$, "CVV$", "CVH$")
9 21-28 I8 OPS --- Number of radiometric compensation data sets in the record (1)
10 29-36 I8 OPS --- Compensation data set size (in bytes)
RADIOMETRIC COMPENSATION DATA SET
11 37-44 A8 OPS --- Compensation data type designator ("RANGE")
12 45-76 A32 OPS --- Compensation data descriptor (processed image: "rg radiometric correction vector", raw data: "elevation antenna pattern")
13 77-80 I4 OPS --- Number of compensation records required to compensate table (1)
14 81-84 I4 OPS --- Sequence number in the full compensation table of the table contained in this record (1)
15 85-92 I8 --- --- Total number of compensation pairs in the full compensation table
16 93-100 I8 OPS --- Slant range sample index corresponding to first correction value in compensation table (1)
17 101-108 I8 PF pradio_comp_length Slant range sample index corresponding to last correction value in compensation table
18 109-116 I8 OPS --- Compensation pixel group size (m pixels). This is the number of pixels for which each of the compensation samples is applicable (1)
19 117-132 F16.7 OPS --- Min. sample index (1)
20 133-148 F16.7 RCF/OPS --- Min. radiometric compensation value (dB)
21 149-164 F16.7 PF pradio_comp_length Max. sample index
22 165-180 F16.7 RCF/OPS --- Max. radiometric compensation value (dB)
23 181-196 A16 --- --- Spare
24 197-204 I8 PF pradio_comp_length Number of compensation table entries (n)
25 205-208 A4 --- --- Padding for word boundary
RADIOMETRIC COMPENSATION TABLE
26 209-224 F16.7 OPS --- 1st compensation sample index (increment by 1)
27 225-240 F16.7 RCF --- 1st compensation sample value (linear scale)
Repeat fields 26-27 for each sample value in the Radiometric Compensation File.
Repeat fields 11-27+ for each data set. (SIR-C has only one data set per record.)
SAR Leader File:
The data quality summary record is defined as follows: (One record per polarization channel)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (8)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (60)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record = 464 (462 + 2 for word boundary padding)
7 13-16 I4 OPS --- Data summary quality record sequence number
8 17-20 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator("XVV$", "LHH$", "LHV$", "LVV$", "LVH$", "CHH$", "CHV$", "CVV$", "CVH$")
9 21-26 A6 CAL_QA qcal_date Date of the nearest calibration update as YYMMDD, where:
YY = last two digits of year
MM = month of the year
DD = day of the month
10 27-30 I4 OPS --- Number of channels (1)
ABSOLUTE RADIOMETRIC DATA QUALITY
11 31-46 F16.7 CAL_QA/OPS qaz_islr,
qrng_islr 2-D Nominal Integrated Side Lobe Ratio (ISLR) (dB)
12 47-62 F16.7 CAL_QA/OPS qaz_pslr,
qrng_pslr 2-D Nominal Peak Side Lobe to main lobe Ratio (PSLR) (dB)
13 63-78 F16.7 CAL_QA qaz_amb Nominal azimuth ambiguity (dB)
14 79-94 F16.7 CAL_QA qrng_amb Nominal range ambiguity (dB)
15 95-110 F16.7 QA_PARM qsnr_mean Estimate of SNR (from range spectra) (dB)
16 111-126 F16.7 QA_PARM qber_prfc Bit Error Rate estimate (BER)
17 127-142 F16.7 CAL_QA qrng_3dbres Nominal slant range resolution (meters)
18 143-158 F16.7 CAL_QA qaz_3dbres Nominal azimuth resolution (meters)
19 159-174 F16.7 CAL_QA qradio_res Nominal radiometric resolution (dB)
20 175-190 F16.7 CAL_QA qinst_dynrng Instantaneous dynamic range (dB)
21 191-206 F16.7 CAL_QA qabs_radio_unc Nominal absolute radiometric calibration uncertainty of SAR frequency band indicated in field 8 (dB)
22 207-222 F16.7 --- --- Nominal absolute phase calibration uncertainty of SAR frequency band indicated in field 8 (deg)
RELATIVE RADIOMETRIC DATA QUALITY
23 223-238 F16.7 CAL_QA qshort_rel_radio_unc Nominal short-term relative radiometric calibration uncertainty of SAR polarization channel (field 8) versus HH channel on a multi-channel volume (dB)
24 239-254 F16.7 CAL_QA qrel_phase_unc Nominal relative phase calibration uncertainty of SAR polarization channel (field 8) versus HH channel on a multi-channel volume (deg)
25 255-270 F16.7 CAL_QA qlong_rel_radio_unc Nominal long-term relative radiometric calibration uncertainty of SAR polarization channel (field 8) versus HH channel on multi-channel volume (dB)
26 271-286 F16.7 CAL_QA qshort_freq_radio_unc Nominal short-term frequency-to-frequency radiometric calibration uncertainty (CHH/LHH) (dB)
27 287-302 F16.7 CAL_QA qlong_freq_radio_unc Nominal long-term frequency-to-frequency radiometric calibration uncertainty (CHH/LHH) (dB)
ABSOLUTE GEOMETRIC DATA QUALITY
28 303-318 F16.7 CAL_QA qatrack_abs_loc_err Nominal absolute location error along track (meters)
29 319-334 F16.7 CAL_QA qxtrack_abs_loc_err Nominal absolute location error cross track (meters)
30 335-350 F16.7 CAL_QA qatrack_scale_err Nominal geometric scale error in along track direction
31 351-366 F16.7 CAL_QA qxtrack_scale_err Nominal geometric scale error in cross track direction
32 367-382 F16.7 CAL_QA qskew_err Nominal geometric skew error
33 383-398 F16.7 CAL_QA qorient_err Scene orientation error (degrees)
RELATIVE GEOMETRIC DATA QUALITY
34 399-414 F16.7 CAL_QA qatrack_polreg_err Along track relative registration error of SAR polarization channel (field 8) versus the HH channel (meters)
35 415-430 F16.7 CAL_QA qxtrack_polreg_err Cross track relative registration error of polarization channel (field 8) versus the HH channels(meters)
36 431-446 F16.7 CAL_QA qatrack_freqreg_err Along track relative registration error between LHH and CHH (meters)
37 447-462 F16.7 CAL_QA qxtrack_freqreg_err Cross track relative registration error between LHH and CHH (meters)
38 463-464 A2 --- --- Spare
SAR Leader File:
Histograms shall be generated for image and signal data files. One histogram record is generated per polarization. Two data sets are included in each record: one for raw data and one for image data. When working with a Reformatted Signal Data data product, no image histogram is provided.
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (9)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (70)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable, depends on whether image histogram data set is provided)
7 13-16 I4 OPS --- Data histograms record sequence number
8 17-20 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator("XVV$", "LHH$", "LHV$", "LVV$", "LVH$", "CHH$", "CHV$", "CVV$", "CVH$")
9 21-28 I8 PF/OPS pdata_product Number of histogram table data sets in this record (2: one raw data histogram and one image data histogram, except RSD product)
10 29-36 I8 OPS --- Histogram table data set size in bytes
11 37-40 A4 --- --- Padding for word boundary
HISTOGRAM DATA SET
12 41-72 A32 OPS --- Histogram descriptor ("RAW$DATA$$$$$..."or "IMAGE$DATA$$$$$...")
13 73-76 I4 OPS --- Number of histogram records needed to reconstitute the full histogram table (1)
14 77-80 I4 OPS --- Sequence number in the full histogram table of the table contained in this record (1)
15 81-88 I8 QA_PARM/OPS qraw_hist_size,
qimg_hist_size Histogram table size, in bytes
16 89-96 I8 PF pprfc_samp,
pdigital_pixels Total number of samples/pixels per line
17 100-104 I8 PF ptotal_rg_lines,
pdigital_lines Total number of image lines
18 105-112 I8 QA_PARM qraw_samp_per_group,
qimg_samp_per_group Data samples/pixels per group in cross track
19 113-120 I8 QA_PARM qraw_lines_per_group,
qimg_lines_per_group Data lines per group in along track
20 121-128 I8 QA_PARM qraw_xtrack_num_groups,
qimg_xtrack_num_groups
Number of groups cross track
21 129-136 I8 QA_PARM qraw_atrack_num_groups,
qimg_atrack_num_groups
Number of groups along track
DATA STATISTICS
22 137-152 F16.7 QA_PARM/OPS qimg_hist_minval Minimum sample value corresponding to first histogram table bin
23 153-168 F16.7 QA_PARM/OPS pbits_per_sample,
qimg_hist_maxval Maximum sample value corresponding to last histogram table bin
24 169-184 F16.7 QA_PARM qraw_hist_mean_global,
qimg_hist_mean_global
Mean sample value
25 185-200 F16.7 QA_PARM qraw_hist_sd_global,
qimg_hist_sd_global Standard deviation of sample value
26 201-216 F16.7 OPS --- Sample value increment
DATA HISTOGRAM STATISTICS
27 217-232 F16.7 OPS --- Minimum histogram table value
28 233-248 F16.7 OPS --- Maximum histogram table value
29 249-264 F16.7 --- --- Mean histogram table value
30 265-280 F16.7 --- --- Standard deviation of histogram table
31 281-288 I8 QA_PARM qraw_hist_size,
qimg_hist_size Number of bins
32 289-296 F16.7 QA_PLOT qraw_hist_data
qimg_hist_data lst histogram table value
33 297-312 F16.7 QA_PLOT qraw_hist_data
qimg_hist_data 2nd histogram table value
34-n 313-m (n-2)F16.7 QA_PLOT qraw_hist_data
qimg_hist_data 3rd to nth histogram table value
Repeat fields 12-nnn for the second data set (unless working with a Reformatted Signal Data data product.)
SAR Leader File:
The range spectra record is defined as follows: (One record per polarization channel)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (10)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (80)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-16 I4 OPS --- Range spectra record sequence number (1, 2, ...)
8 17-20 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator("XVV$", "LHH$", "LHV$", "LVV$", "LVH$, "CHH$, "CHV$", "CVV$", "CVH$")
9 21-28 I8 OPS --- Number of spectra table data sets in this record (1)
10 29-36 I8 OPS --- Spectra table data set size in bytes
RANGE SPECTRA DATA
11 37-40 I4 OPS --- Number of range spectra data records required to reconstitute the full spectra table (1)
12 41-44 I4 OPS --- Sequence number in the full spectra table of the table contained in this record (1)
13 45-52 I8 PF pprfc_sample Total number of samples in range direction
14 53-60 I8 QA_PARM qrngspec_offset Number of samples offset from first sample in range line
15 61-68 I8 QA_PARM qrngspec_num_lines Number of range lines integrated for spectra
16 69-84 F16.7 QA_PLOT/OPS pcmplx_samp_rate,
qrngspec_num_bins Center frequency of first spectra bin (MHz)
17 85-100 F16.7 QA_PLOT/OPS pcmplx_samp_rate,
qrngspec_num_bins Center frequency of last spectra bin (MHz)
18 101-116 F16.7 QA_PLOT/OPS qrngspec_data Minimum spectral power (dB)
19 117-132 F16.7 QA_PLOT/OPS qrngspec_data Maximum spectral power (dB)
20 133-148 A16 --- --- Spare
21 149-164 A16 --- --- Spare
SPECTRAL DATA TABLE VALUES
22 165-172 I8 QA_PARM qrngspec_num_bins Number of frequency bins in table
23 173-176 A4 --- --- Padding for word boundary
24 176-192 F16.7 QA_PLOT qrngspec_data lst spectral data value (dB)
25 193-208 F16.7 QA_PLOT qrngspec_data 2nd spectral data value (dB)
...
F16.7 QA_PLOT qrngspec_data nth spectral data value (dB)
SAR Leader File:
Radar Parameter Update Data Record
(One DWP change record shared by all polarizations. One receiver gain change record per polarization channel.)
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (11)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (100)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-16 I4 OPS --- Radar parameter record sequence number (1)
8 17-20 A4 --- --- Number of radar parameter update data sets in the record (one record for DWP and one record for Receiver Gain per polarization)
9 21-28 I8 OPS --- Number of data sets
10 29-36 I8 OPS --- Radar parameter update data set size (variable)
11 37-40 A4 --- --- Padding for word boundary
RADAR PARAMETER UPDATE DATA SET
12 41-60 A20 PF/DWP/RGF pprfc,
pgmt_0met,
pmet_request, GMT of Change ("YYYYMMDD hhmm:ss.ttt")
13 61-64 A4 PF/OPS pfrequency,
ppolarization SAR channel indicator ("LHH$", "LHV$", "LVV$", "LVH$", "CHH$", "CHV$", "CVV$", "CVH$")
14 65-72 I8 DWP/RGF --- Radar data line number where this update takes effect
15 73-80 I8 OPS --- Radar data sample number where this update takes effect (1)
16 81-112 A32 OPS --- Parameter descriptor field, one of:
"RECEIVER$GAIN$$$..."
"DATA$WINDOW$POSITION$$$..."
17 113-128 F16.7 PF/DWP/RGF pdwp_step Parameter value. gain (dB), DWP (msec)
Repeat fields 12-17 for each record in the respective file.
SAR Leader File:
Detailed Processing Parameters Data Record
The detailed processing parameters record length, format, and data content are completely facility defined with the exception of the 12 byte preamble.
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (12)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (120)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (eg. CEOS=20, CCRS=36, ESA=50, NASA=60, NASA-JPL=61, NASDA=70, DFVLR=80, RAE=90, TELESPAZIO=100, UNSPECIFIED = 18, etc.)
6 9-12 B4 OPS --- Length of this record = 1312 (includes word boundary padding)
7 13-16 I4 OPS --- Detailed processing parameters record sequence number (1)
8 17-20 A4 --- --- Blanks
9 21-28 I8 QA_PARM qnum_flywheels Number of flywheels
10 29-108 10I8 QA_PARM qmissing_line_chan1 Locations of missing line segments in Channel 1 (5 location pairs: start frame count, end frame count)
11 109 I1 QA_PARM qexcess_line_chan1 Flag indicating more than 5 missing line segments in Channel 1
12 110-189 10I8 QA_PARM qmissing_line_chan2 Locations of missing line segments in Channel 2 (5 location pairs: start frame count, end frame count)
13 190 I1 QA_PARM qexcess_line_chan2 Flag indicating more than 5 missing line segments in Channel 2
14 191-270 10I8 QA_PARM qmissing_line_chan3 Locations of missing line segments in Channel 3 (5 location pairs: start frame count, end frame count)
15 271 I1 QA_PARM qexcess_line_chan3 Flag indicating more than 5 missing line segments in Channel 3
16 272-351 10I8 QA_PARM qmissing_line_chan4 Locations of missing line segments in Channel 4 (5 location pairs: start frame count, end frame count)
17 352 I1 QA_PARM qexcess_line_chan4 Flag indicating more than 5 missing line segments in Channel 4
18 353-368 F16.7 QA_PARM qref_cal_gain Reference caltone gain setting (dBmW)
HH
19 369-384 F16.7 QA_PARM HV
20 385-400 F16.7 QA_PARM VV
21 401-416 F16.7 QA_PARM VH
22 417-432 F16.7 QA_PARM qcal_gain_mean Mean of caltone gain estimates (dBmW)
HH
23 433-448 F16.7 QA_PARM HV
24 449-464 F16.7 QA_PARM VV
25 465-480 F16.7 QA_PARM VH
26 481-496 F16.7 QA_PARM qcal_gain_sd Standard deviation of caltone gain estimates (dBmW)
HH
27 497-512 F16.7 QA_PARM HV
28 513-528 F16.7 QA_PARM VV
29 529-544 F16.7 QA_PARM VH
30 545-560 F16.7 QA_PARM qraw_hist_oversat_mean Average percent of over saturation in raw data histogram
HH
31 561-576 F16.7 QA_PARM HV
32 577-592 F16.7 QA_PARM VV
33 593-608 F16.7 QA_PARM VH
34 609-624 F16.7 QA_PARM qraw_hist_undersat_mean Average percent of under saturation in raw data histogram
HH
35 625-640 F16.7 QA_PARM HV
36 641-656 F16.7 QA_PARM VV
37 657-672 F16.7 QA_PARM VH
38 673-680 I8 PF pproc_run_num Processing run number
39 681-688 A8 PF pmission_id Mission ID (flight number)
40 689 I1 PF pbeam_spoiling_mode Antenna beam spoiling mode (0-7)
41 690-713 A24 PF/OPS pgmt_0met,
pmet_image_start GMT of image start (YYYY/MM/DD hh:mm:ss.ttt)
42 714-729 F16.7 PF pgmt_0met,
pmet_image_start GMT of image start in seconds (.ccc)
43 730-745 F16.7 PF pimage_duration Image duration (s)
44 746-761 F16.7 PF pnear_rg_slant_rg Near slant range (km)
45 762-777 F16.7 PF pearth_rad_ctr Radius of the earth at image center (km)
46 778-793 F16.7 PF pearth_rad_nadir Radius of the earth at nadir (km)
47 794-801 I8 PF pgmt_0met GMT of 0 MET: year
48 802-809 I8 PF pgmt_0met GMT of 0 MET: days
49 810-817 I8 PF pgmt_0met GMT of 0 MET: hours
50 818-825 I8 PF pgmt_0met GMT of 0 MET: minutes
51 826-833 F8.3 PF pgmt_0met GMT of 0 MET: seconds (Units: ss.ccc)
52 834-849 F16.7 PF ptime_drift MET drift time (Units 10**-6)
53 850-865 F16.7 PF pfd0_constant Fd0 constant term (Hz)
54 866-881 F16.7 PF pfd0_linear Fd0 linear term (10**-3 Hz)
55 882-897 F16.7 PF pfd0_quadratic Fd0 quadratic term (10**-7 Hz)
56 898-913 F16.7 PF pfd1_constant Fd1 constant term (10**-3 Hz)
57 914-929 F16.7 PF pfd1_linear Fd1 linear term (10**-6 Hz)
58 930-945 F16.7 PF pfd1_quadratic Fd1 quadratic term (10**-10 Hz)
59 946-961 F16.7 PF pfd2_constant Fd2 constant term (10**-6 Hz)
60 962-977 F16.7 PF pfd2_linear Fd2 linear term (10**-9 Hz)
61 978-993 F16.7 PF pfd2_quadratic Fd2 quadratic term (10**-14 Hz)
62 994-1009 F16.7 PF pfr0_constant Fr0 constant term (Hz/sec)
63 1010-1025 F16.7 PF pfr0_linear Fr0 linear term (10**-3 Hz/sec)
64 1026-1041 F16.7 PF pfr0_quadratic Fr0 quadratic term (10**-7 Hz/sec)
65 1042-1057 F16.7 PF pfr1_constant Fr1 constant term (10**-3 Hz/sec)
66 1058-1073 F16.7 PF pfr1_linear Fr1 linear term (10**-6 Hz/sec)
67 1074-1089 F16.7 PF pfr1_quadratic Fr1 quadratic term (10**-10 Hz/sec)
68 1090-1105 F16.7 PF pfr2_constant Fr2 constant term (10**-7 Hz/sec)
69 1106-1121 F16.7 PF pfr2_linear Fr2 linear term (10**-10 Hz/sec)
70 1122-1137 F16.7 PF pfr2_quadratic Fr2 quadratic term (10**-14 Hz/sec)
71 1138-1148 A11 PF pprocessing_date Processing date (MM-DD-YYYY)
72 1149-1164 F16.7 PF pavg_roll Average roll angle estimates from null-line processing (deg)
73 1165-1180 F16.7 PF pnear_incidence_angle Near range incidence angle (deg)
74 1181-1196 F16.7 PF pfar_incidence_angle Far range incidence angle (deg)
75 1197-1212 I8 PF paz_ref_length Azimuth reference function length at mid-swath (samples)
76 1213-1220 F16.7 PF psignal_gain Signal processing gain
77 1221-1236 F16.7 PF phh_caltone_phase HH Caltone Phase Estimate (deg)
78 1237-1252 F16.7 PF phv_caltone_phase HV Caltone Phase Estimate (deg)
79 1253-1268 F16.7 PF pvv_caltone_phase VV Caltone Phase Estimate (deg)
80 1269-1284 F16.7 PF pvh_caltone_phase VH Caltone Phase Estimate (deg)
81 1285-1286 I2 PF ppolarization Internal SIR-C Polarization Index (0:HH, 1:HV, 2:VV, 3:VH, 4:QUADPOL, 5:HHHV, 6:VVVH, 7:HHVV, 8:HHVH, 9:VVHV, 10:HVVH)
82 1287-1294 I8 PF psample_offset Offset to first processing range sample
83 1295-1310 F16.7 PF prange_str_angle Range electronic steering angle
84 1311-1312 A2 --- --- Spare
SAR Leader File:
This record stores the 4x4 polarimetric calibration matrix and the absolute calibration coefficient.. The functions include channel balancing, phase calibration, and cross-talk removal. Whenever the polarimetric calibration function has not been performed, as in the case of single pol data, the calibration matrix is the identity matrix.
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Sequence number (13)
2 5 Bl OPS --- lst record subtype code (10)
3 6 Bl OPS --- Record type code (130)
4 7 Bl OPS --- 2nd record subtype code (50)
5 8 Bl OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (776)
7 13-16 I4 OPS --- Calibration record sequence number (1)
8 17-20 A4 --- --- Blanks
9 21-36 F16.7 PF pabs_cal_coeff Absolute calibration coefficient
10 37-52 F16.7 PF pchannel_imbalance Channel imbalance between HH and VV channels (dB)
11 53-68 F16.7 PF pphase_error Phase error between HH and VV channels (deg)
12 69-772 32D22.15 POLCAL pcalibration_process 4x4 polarimetric calibration (complex) matrix
13 773-776 A4 --- --- Padding for word boundary
Imagery Options File:
File Descriptor Record -Fixed Segment Contents
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Record sequence number (1)
2 5 B1 OPS --- 1st record subtype code (63)
3 6 B1 OPS --- Record type code (192)
4 7 B1 OPS --- 2nd record subtype code (18)
5 8 B1 OPS --- 3rd record subtype code (18)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-14 A2 OPS --- ASCII flag ("A$")
8 15-16 A2 --- --- Blanks
9 17-28 A12 OPS --- Control Document Number for this file ("CEOS$SAR$CCT")
10 29-30 A2 OPS --- Control Document revision number ("A$", then "B$",... and so on)
11 31-32 A2 OPS --- File design descriptor revision number ("A$", then "B$",... and so on)
12 33-44 A12 PF psw_version Software ID (same as field 12 of the volume descriptor record)
13 45-48 I4 RDC --- File number (2)
14 49-64 A16 OPS --- File name
15 65-68 A4 OPS --- Record sequence and location type flag (FSEQ)
16 69-76 I8 OPS --- Sequence number location ($$$$$$$1)
17 77-80 I4 OPS --- Sequence number field length ($$$4)
18 81-84 A4 OPS --- Record code and location type flag (FTYP)
19 85-92 I8 OPS --- Record code location ($$$$$$$5)
20 93-96 I4 OPS --- Record code field length ($$$4)
21 97-100 A4 OPS --- Record length and location type flag (FLGT)
22 101-108 I8 OPS --- Record length location ($$$$$$$9)
23 109-112 I4 OPS --- Record length field length ($$$4)
24-27 113-120 I8 PF pheader_size Number of bytes of header data at the beginning of each signal data file (RSD data product only)
28 121-180 A60 --- --- Reserved
Imagery Options Record:
File Descriptor Record - Variable Segment Contents
The SAR Data File will contain either signal data or processed image data.
29 181-186 I6 PF/OPS pdigital_lines
ptotal_rg_lines
pgec_lines SAR DATA records count (number of lines in image/data file)
30 187-192 I6 PF pdigital_pixels
ppfrc_samp
pgec_pixels SAR DATA record length in bytes (number of pixels/samples per line * number of bytes per pixel/sample)
31 193-216 A24 PF/OPS ppolarization Polarization strings (e.g. "HH HV VV VH")
SAMPLE GROUP DATA
32 217-220 I4 PF/OPS pdata_product
pspecial_product Number of bits per sample/pixel
RSD: 8
MLD: 16
MLC, SLC: blanks
GEC, GTC: 16
33 221-224 I4 PF/OPS pdata_product
pspecial_product Number pixels per data group
MLD: 1
MLC: dual pol: 2, quad pol: 3
SLC: single pol: 1, dual pol: 2, quad pol: 4
RSD: 1
GEC, GTC: single pol: 1, dual pol: 2, quad pol: 3
34 225-228 I4 PF/OPS pbytes_per_pixel Number of bytes per data group
MLD: 2
MLC: dual pol: 5, quad pol: 10
SLC: single pol: 4, dual pol: 6, quad pol: 10
RSD: 1
GEC, GTC: single pol: 2, dual pol: 5, quad pol: 10
35 229-232 A4 --- --- Justification and order of samples/pixels within data group (blank)
SAR DATA
36 233-236 I4 PF/OPS ppolarization Number of SAR polarization channels
37 237-244 I8 PF pdigital_lines
ptotal_rg_lines
pgec_lines Number of image/data lines per polarization channel
38 245-248 I4 OPS --- Number of left border pixels per line (0)
39 249-256 I8 PF pdigital_pixels
pprfc_samp
pgec_pixels Total number of samples/pixels/data groups allocated per line per SAR channel
40 257-260 I4 OPS --- Right border pixels per line (0)
41 261-264 I4 OPS --- Number of top border scan lines (0)
42 265-268 I4 OPS --- Number of bottom border scan lines (0)
43 269-272 A4 OPS --- Interleaving indicator "BSQ$"
RECORD DATA
44 273-274 I2 OPS --- Number of physical records per line (1)
45 275-276 I2 OPS --- Number of physical records per multichannel line in this file (1)
46 277-280 I4 OPS --- Length of prefix data per line (0)
47 281-288 I8 PF pdigital_pixels
pprfc_samp
pgec_pixels Number of bytes of sample/image data per line (including fill) (same as 30 above)
48 289-292 I4 OPS --- Length of suffix data per line (0)
49 293-296 A4 --- --- Prefix/suffix repeat flag
PREFIX/SUFFIX DATA LOCATORS
50 297-304 A8 --- --- Sample data line number locater
51 305-312 A8 --- --- SAR channel number locator
52 313-320 A8 --- --- Time of SAR data locator
53 321-328 A8 --- --- Left-filled count locater
54 329-336 A8 --- --- Right-filled count locater
55 337-340 A4 --- --- Pad pixels present indicator: "YES$" or "NO$$" (always "$$$$" for SAR data)
56 341-368 A28 --- --- Blanks
57 369-376 A8 --- --- SAR data line quality code locater
58 377-384 A8 --- --- Calibration information field locater
59 385-392 A8 --- --- Gain values field locater A8
60 393-400 A8 --- --- Bias values field locater A8
PIXEL DATA DESCRIPTION
61 401-428 A28 PF/OPS pdata_product
pspecial_product SAR data format type identifier:
MLD: "POWER DETECTED$$$$$$$$$$$"
MLC: "COMPRESSED CROSS-PRODUCTS$$$"
SLC: "COMPRESSED SCATTERING MATRIX"
RSD: "REAL BYTE$$$$$$$$$$$$$$$$$$$$$$$"
GEC, GTC: single pol: "POWER DETECTED$$$$$$$$$$$"
dual and quad pol: "COMPRESSED CROSS-PRODUCTS$$$"
62 429-432 A4 --- --- SAR data format type code
63 433-436 I4 OPS --- Number of left fill bits within pixel (0)
64 437-440 I4 OPS --- Number of right fill bits within pixel (0)
65 441-448 I8 --- --- Maximum data range of pixel
64 449-n A<N> --- --- Blanks (Pad record with blanks such that this record is the same length as the Image Data Record (or Reformatted Signal Data Record))
Imagery Options File:
Reformatted Signal Data Records (RSD)
One record per polarization channel.
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Record sequence number (2, 3, 4...)
2 5 B1 OPS --- 1st record subtype code (50)
3 6 B1 OPS --- Record type code (10)
4 7 B1 OPS --- 2nd record subtype code (50)
5 8 B1 OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-n B2 One line of raw data Real byte format
Imagery Options File:
Image Data Records
Field Bytes Format Source Parameter Description
1 1-4 B4 OPS --- Record sequence number (2, 3, 4...)
2 5 B1 OPS --- 1st record subtype code (50)
3 6 B1 OPS --- Record type code (11)
4 7 B1 OPS --- 2nd record subtype code (50)
5 8 B1 OPS --- 3rd record subtype code (20)
6 9-12 B4 OPS --- Length of this record (variable)
7 13-n One line of image MLD: 2 bytes/pixel
MLC: dual pol: 5, quad pol: 10
SLC: single pol: 4, dual pol: 6, quad pol: 10
GEC, GTC: single pol: 2 bytes/pixel
dual pol: 5, quad pol: 10
The SAR Leader and SAR Trailer files serve the same purpose. Since the SIR-C implementation of CEOS puts all data in the Leader file; the Trailer file simply contains the File Descriptor Record.
Field Bytes Format Source Parameter Description
FIXED LENGTH RECORD SEGMENT
1 1-4 B4 OPS --- Record sequence number (1)
2 5 Bl OPS --- 1st rec.subtype code (63)
3 6 Bl OPS --- Record type code (192)
4 7 Bl OPS --- 2nd rec.subtype code (18)
5 8 Bl OPS --- 3rd rec.subtype code (18)
6 9-12 B4 OPS --- Record length (720)
7 13-14 A2 OPS --- ASCII flag("A$")
8 15-16 A2 --- --- Blank
9 17-28 A12 OPS --- Format control document ("CEOS-SAR-CCT")
10 29-30 A2 OPS --- Format control document version ("A$")
11 31-32 A2 OPS --- Record format rev.level ("A$")
12 33-44 A12 OPS --- Software id
13 45-48 I4 RDC --- File number (3)
14 49-64 A16 OPS --- File name (same as field 10 of file pointer record)
15 65-68 A4 OPS --- Record sequence and location type flag ("FSEQ")
16 69-76 I8 OPS --- Sequence number location (1)
17 77-80 I4 OPS --- Sequence number field length (4)
18 81-84 A4 OPS --- Record code and location type flag ("FTYP")
19 85-92 18 OPS --- Record code location (5)
20 93-96 I4 OPS --- Record code field length (4)
21 97-100 A4 OPS --- Record length and location type flag ("FLGT")
22 101-108 I8 OPS --- Record length location (9)
23 109-112 I4 OPS --- Record length field length (4)
24 113 Al --- --- Blank
25 114 Al --- --- Blank
26 115 Al --- --- Blank
28 117-180 A64 --- --- Blanks
VARIABLE SEGMENT CONTENTS
29 181-186 I6 OPS --- Number of data set summary records (0)
30 187-192 I6 OPS --- Record length (0)
31 193-198 I6 OPS --- Number of map projection data records (0)
32 199-204 I6 OPS --- Record length (0)
33 205-210 I6 OPS --- Number of platform position data records (0)
34 211-216 I6 OPS --- Record length (0)
35 217-222 I6 OPS --- Number of attitude data records (0)
36 223-228 I6 OPS --- Record length (0)
37 229-234 I6 OPS --- Number of radiometric data records (0)
38 235-240 I6 OPS --- Record length (0)
39 241-246 I6 OPS --- Number of radiometric compensation records (0)
40 247-252 I6 OPS --- Record length (0)
41 253-258 I6 OPS --- Number of data quality summary records (0)
42 259-264 I6 OPS --- Record length (0)
43 265-270 I6 OPS --- Number of data histogram records (0)
44 271-276 I6 OPS --- Record length (0)
45 277-282 I6 OPS --- Number of range spectra records (0)
46 283-288 I6 OPS --- Record length (0)
47 289-294 I6 OPS --- Number of digital elevation model descriptor records (0)
48 295-300 I6 OPS --- Record length (0)
49 301-306 I6 OPS --- Number of radar parameter update records (0)
50 307-312 I6 OPS --- Record length (0)
51 313-318 I6 OPS --- Number of annotation data records (0)
52 319-324 I6 OPS --- Record length (0)
53 324-330 I6 OPS --- Number of detailed processing records (0)
54 331-336 I6 OPS --- Record length (0)
55 337-342 I6 OPS --- Number of calibration data records (0)
56 343-348 I6 OPS --- Record length (0)
57 349-354 I6 OPS --- Number of ground control points descriptor records (0)
58 355-360 I6 OPS --- Record length (0)
59 361-366 I6 --- --- Blanks
60 367-372 I6 --- --- Blanks
61 373-378 I6 --- --- Blanks
62 379-384 I6 --- --- Blanks
63 385-390 I6 --- --- Blanks
64 391-396 I6 --- --- Blanks
65 397-402 I6 --- --- Blanks
66 403-408 I6 --- --- Blanks
67 409-414 I6 --- --- Blanks
68 415-420 I6 --- --- Blanks
69 421-426 I6 OPS --- Number of facility data records (0)
70 427-432 I6 OPS --- Record length (0)
71 433-720 A288 --- --- Blank
Field Bytes Format Source Parameter Description
1 1-4 B4 RDC --- Record sequence number (1)
2 5 B1 RDC --- 1st record subtype code (192)
3 6 B1 RDC --- Record type code (192)
4 7 B1 RDC --- 2nd record subtype code (63)
5 8 B1 RDC --- 3rd record subtype code (18)
6 9-12 B4 RDC --- Record length (360)
7 13-14 A2 RDC --- ASCII flag (A$)
8 15-16 A2 --- --- Blanks ($$)
9 17-28 A12 RDC --- Format control doc (CEOS -SAR-CCT)
10 29-30 A2 RDC --- Format control version (A$)
11 31-32 A2 RDC --- Format control document version (A$)
12 33-44 A12 RDC --- Software id
13 45-60 A16 RDC --- Physical tape id
14 61-76 A16 RDC --- Logical set id
15 77-92 A16 RDC --- Volume set id
16 93-94 I2 RDC --- Total number of physical volumes
17 95-96 I2 RDC --- 1st physical volume sequence number (1$)
18 97-98 I2 RDC --- Last physical volume sequence number (1$)
19 99-100 I2 RDC --- This physical volume sequence number (1$)
20 101-104 I4 RDC --- 1st reference file in volume ($$$$)
21 105-108 I4 RDC --- Logical volume in set (2$$$)
22 109-112 I4 RDC --- Logical volume number in physical volume (2$$$)
23 113-120 A8 --- --- Blanks
24 121-128 A8 --- --- Blanks
25 129-140 A12 --- --- Blanks
26 141-148 A8 --- --- Blanks
27 149-160 A12 --- --- Blanks
28 161-164 I4 --- --- Blanks
29 165-168 I4 --- --- Blanks
30 169-260 A92 --- --- Spare
31 261-360 A100 --- --- Spare