METHOD FOR FORMING DIGITAL ELEVATION MODEL TO MEASURE TOPOGRAPHIC ELEVATION USING GEOMETRIC CHARACTERISTICS OF INTERFEROMETRIC SYNTHETIC APERTURE RADAR(INSAR)

摘要

PURPOSE: A method for forming a digital elevation model to measure geometric characteristics of an interferometric synthetic aperture radar(InSAR) is provided to obtain pass difference only due to topographic fringe on the ground of pass difference due to satellite parameters. CONSTITUTION: According to the method, a pass difference from a satellite orbit to a target on the earth is calculated using a repeat pass satellite. A pass difference due to satellite parameters becomes quantitative. A pass difference is calculated using topographic fringe after removing the pass error due to the satellite fringe on the pass difference. An interferometric phase is detected from the pass difference due to topographic fringe. And topographic elevation is obtained from the interferometric phase. Then, the elevation value is processed through multi-look processing or space filtering.