Abstract
A digital terrain matrix (DTM) with sub-meter precision and at least three meter posting is needed to support a variety environmental, geophysical, economic and resource management tasks. Repeated measurements of DTM changes with five centimeters to one meter vertical resolutions and at least ten meter posting are needed for detection and measurement of a variety of geophysical processes. The Lockheed Martin Missiles and Space Digital Terrain Elevation Mapping System (DTEMS) which will be capable of providing data to satisfy these needs. DTEMS will use a NASA/Lockheed ER-2 aircraft with an X-band interferometric synthetic aperture radar (IFSAR) for collection, processing and archive of DTM with thirty centimeter average precision and one to three meter posting. DTEMS is expected to become operational by April 1997.
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