Ionospheric Scintillation Effects on a Space-Based, Foliage Penetration, Ground Moving Target Indication Radar.

摘要

This report provides the results of a brief study of the possible effects of ionospheric scintillation on a space-based, foliage-penetration (FOPEN), ground moving-target indication (GMTI) radar operating in the ultrahigh-frequency (UHF) band. The results of publicly available data and analyses are applied to a specific strawman FOPEN space-based radar (SBR) system operating from low-Earth orbit. Performance degradations due to ionospheric scintillation and a combination of ionospheric scintillation and internal clutter motion caused by wind are calculated for a 3 m/s target minimum detectable velocity (MDV) at 15-deg grazing, point parameters felt to be minimally acceptable for an operational system. Space-time adaptive processing (STAP) is used to provide the clutter rejection necessary for successful performance. Implications of ionospheric scintillation for synthetic aperture- based GMTI processing are also discussed.