G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/89 (2006.01) G01S 13/87 (2006.01) G01S 13/90 (2006.01)
Patent
CA 2114528
Synthetic aperture radar data is used in conjunction with altimeter data (a) to produce a terrain map corrected for platform roll angle. The technique uses two synthetic radar antennas (21, 22) and a ranging altimeter (23) placed on an aircraft. The aircraft is moved in a set of substantially parallel flight paths where each flight is directly over the strip of terrain viewed by the synthetic aperture radar of an adjacent flight. During each flight the at least one antenna repeatedly transmits radar signals whose return echoes are received by both the first and second antennas. Conventional synthetic aperture radar processing yields a terrain map uncorrected for roll angle. The uncorrected terrain map data from one flight are compared with the altimeter data taken during an adjacent flight. This roll angle measure is then used to correct the height and ground range of nearby points in the uncorrected terrain map.
Environmental Research Institute Of Michigan
Ridout & Maybee Llp
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