This image of the area surrounding the city of New Orleans, Louisiana in the

southeastern United States demonstrates the ability of multi-frequency

imaging radar to distinguish different types of land cover. The dark area in

the center is Lake Pontchartrain. The thin line running across the lake is a

causeway connecting New Orleans to the city of Mandeville. Lake Borgne is

the dark area in the lower right of the image. The Mississippi River appears

as a dark, wavy line in the lower left. The white dots on the Mississippi

are ships. The French Quarter is the brownish square near the left center of

the image. The New Orleans Airport is the bright spot near the center,

jutting out into Lake Pontchartrain. The image was acquired by the

Spaceborne Imaging Radar C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR)

during orbit 39 of space shuttle Endeavour on October 2, 1994. The area is

located at 30.10 degrees north latitude and 89.1 degrees west longitude. The

area shown is approximately 100 kilometers (60 miles) by 50 kilometers (30

miles). The colors in this image were obtained using the following radar

channels: red represents the L-band (horizontally transmitted and received);

green represents the C-band (horizontally transmitted and received); blue

represents the L-band (vertically transmitted and received). The green areas

are primarily vegetation consisting of swamp land and swamp forest (bayou)

growing on sandy soil, while the pink areas are associated with reflections

from buildings in urban and suburban areas. Different tones and colors in

the vegetation areas will be studied by scientists to see how effective

imaging radar data is in discriminating between different types of wetlands.

Accurate maps of coastal wetland areas are important to ecologists studying

wild fowl and the coastal environment.

P-45164 February 23, 1995

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Updated 03/30/95

bruce.chapman@jpl.nasa.gov