A method for determining an absolute phase between two interferometric, by means of radar with synthetic aperture (sar) images generated

摘要

to determine the absolute phase between two interferometrischen using sar images, obtained after initialization (100) in a first sequence (1200), a subtraction (1220) between an unfiltered, folded in stage ff and a priori absolute phase ref durchgefu00fc hrt.the subtraktionsergebnis (ff - ref) after low pass filtering (1210) as (1240) and increased phase, the absolute phase ref again added (1260). with the help of the absolute in a standard deviation sn phase clamps on the difference from the absolute in phase clamps and a priori absolute phase ref found (1300).depending on a comparison (1400) is the standard deviation of sn with a previously calculated standard deviation sa, the iteration continuesby the a priori absolute phase ref with the last calculated absolute in phase and, at the same time, the old standard deviation of sa with the new standard deviation sn are loaded, and then back to the first sequence (1200) is decreased, and the iteration is stopped when a e absolute phase uffabs first form is reached, the last calculatedengaged in - phase it is equivalent, and then taking into account the fluggeometrie exact terrain model is calculable.