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This is a Space Shuttle radar (SIR-C) image of Kohala volcano, which is the oldest of the five volcanoes on the Big Island. The image was collected in April 1994. It is only a low resolution version of the data that will ultimately be available once the full data set is processed. However, even at this scale we get a rare vied of Kohala because typically it has many clouds around the summit. Radar, because it operates at a wavelength that is not affected by clouds, can "see" the surface whatever the weather. This is part of SIR-C Data Take 122.2.


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During the second SIR-C flight, some of the data were obtained at very high resolution so that topographic mapping could be performed via a technique called "radar interferometry". This image of the summit of Kohala volcano shows the advantage of this high-resolution mode. Notice the graben that forms the summit of the volcano, and all of the fine stream channels that are to the bottom of this image

Copyright by P. Mouginis-Mark