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1995-02-23
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PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIFORNIA 91109. TELEPHONE (818) 354-5011
PHOTO CAPTION P-43933
April 17, 1994
Mammoth 3-D
This is a three-dimensional perspective of Mammoth Mountain,
California. This view was constructed by overlaying a Spaceborne
Imaging Radar-C (SIR-C) radar image on a U.S. Geological Survey
digital elevation map. Vertical exaggeration is 1.87 times. The
image is centered at 37.6 degrees north, 119.0 degrees west. It
was acquired from the Spaceborne Imaging Radar C/X-Band
Synthetic Aperture Radar (SIR-C/X-SAR) onboard space shuttle
Endeavour on its 67th orbit on April 13, 1994. In this color
representation, red is C-band HV-polarization, green is C-band
VV-polarization and blue is the ratio of C-band VV to C-band HV.
Blue areas are smooth, and yellow areas are rock outcrops with
varying amounts of snow and vegetation. Crowley Lake is in the
foreground, and Highway 395 crosses in the middle of the image.
Mammoth Mountain is shown in the upper right.
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Spaceborne Imaging Radar-C and X-Synthetic Aperture Radar
(SIR-C/X-SAR) is part of NASA's Mission to Planet Earth. The
radars illuminate Earth with microwaves allowing detailed
observations at any time, regardless of weather or sunlight
conditions. SIR-C/X-SAR uses three microwave wavelengths: L-band
(24 cm), C-band (6 cm) and X-band (3 cm). The multi-frequency
data will be used by the international scientific community to
better understand the global environment and how it is changing.
The SIR-C/X-SAR data, complemented by aircraft and ground
studies, will give scientists clearer insights into those
environmental changes which are caused by nature and those
changes which are induced by human activity. SIR-C was developed
by NASA's Jet Propulsion Laboratory. X-SAR was developed by the
Dornier and Alenia Spazio companies for the German space agency,
Deutsche Agentur fuer Raumfahrtangelegenheiten (DARA), and the
Italian space agency, Agenzia Spaziale Italiana (ASI).
#####