System Design of Interferometric SAR to Meet HRTI-3 Standards

Abstract

In this paper, we propose the system configuration to execute SAR Interferometry which meets HRTI-3 (High Resolution Terrain Information) standards. For this purpose, we derive the maximum and minimum perpendicular baseline numbers over helical orbit and further tune the upper limit on off-nadir distance. We analyze the resultant overall relative height accuracy considering the impacts of: 1) Interferometric phase errors due to degradation in total correlation and 2) Baseline estimation errors.