Three dimensional perspective view of portion of western Galapagos Islands

STS059-S-085 (18 April 1994) --- This is a three-dimensional perspective view of part of Isla Isabela in the western Galapagos Islands. It was taken by the L-Band radar in HH polarization from the Spaceborne Imaging Radar-C and X-Band Synthetic Aperture Radar (SIR-C/X-SAR) on the 40th orbit of the Space Shuttle Endeavour. This view was constructed by overlaying a SIR-C radar image on a U.S. Geological Survey digital elevation map. The image is centered at about.5 degrees south latitude and 91 degrees west longitude, and covers an area of 75 by 60 kilometers. The radar incidence angle at the center of the image is about 20 degrees. The western Galapagos Islands, which lie about 1200 kilometers west of Ecuador in the eastern Pacific, have six active volcanoes similar to the volcanoes found in Hawaii. Since the time of Charles Darwin's visit to the area in 1835, there have been over 60 recorded eruptions on these volcanoes. This SIR-C/X-SAR image of Alcedo and Sierra Negra volcanoes shows the rougher lava flows as bright features, while ash deposits and smooth pahoehoe lava flows appear dark. The Galapagos Islands are one of the SIR-C/X-SAR supersites and data of this area will be ta

Date

1994-04-18

Collection

JSC

Archive

NASA Image and Video Library

Type

photograph

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