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1993-04-23
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44 lines
OFFICE OF PUBLIC INFORMATION
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIFORNIA. TELEPHONE (213) 354-5011
___________________________________________________
Radar images of the coastal regions of North America are
being studied by scientists as Seasat-A, NASA's first ocean-
monitoring satellite, completes its first month in orbit.
Launched June 26 from Vandenberg Air Force Base in
California, Seasat is observing the world's oceans from an
805-kilometer (500-mile) high polar orbit.
One of the satellite's five microwave sensors is a
powerful radar system, called a Synthetic Aperture Radar (SAR),
which produces "pictures" of the Earth's surface day or night and
under all weather conditions.
A typical SAR operation produces a continuous swath of
radar images 97 km (60 mi.) wide by 4,023 km (2,500 mi) long, ex-
tending from the west coast of Mexico to Alaska. The information
for such a swath is acquired by the satellite in 10 minutes and
is processed later into a strip of pictures at NASA's Jet
Propulsion Laboratory (JPL) in Pasadena, Calif. JPL manages the
Seasat project for the NASA Office of Space and Terrestrial
Applications.
Radar images now being analyzed include those which
show the Arctic ice pack, the Gulf Stream in the Atlantic Ocean
off the coast of Florida, the Caribbean Sea off the northern
coast of South America, a recent hurricane zone in the Pacific
near the Baja California peninsula.
In addition to the NASA scientists, other government
agency scientists studying the Seasat data are from: the Na-
tional Ocean and Atmospheric Administration, National Environ-
mental Satellite Service, U.S. Navy and the U.S. Geological
Survey.
#876-7/27/78
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