Title :
SAR Imaging Degradation by Ionospheric Irregularities Based on TFTPCF Analysis
Author :
Li, Lianlin ; Li, Fang
Author_Institution :
Inst. of Electron., Chinese Acad. of Sci., Beijing
fDate :
5/1/2007 12:00:00 AM
Abstract :
The effects of ionospheric irregularities on spaceborne synthetic aperture radar (SAR) signal propagation with double path and multilook angle are studied in a model in which a two-frequency and two-position coherence function (TFTPCF) has been adopted for analysis. The TFTPCF is derived from the phase-screen principle. The ambiguity function based on TFTPCF has been used to analyze the effects of ionospheric turbulence on range resolution and cross resolution. The results show that, in some cases, the effects from the irregularities on SAR imaging can be very serious
Keywords :
UHF radio propagation; VHF radio propagation; ionospheric electromagnetic wave propagation; radar imaging; radar resolution; remote sensing by radar; spaceborne radar; synthetic aperture radar; SAR imaging; TFTPCF analysis; image degradation; ionospheric irregularities; signal propagation; spaceborne radar; synthetic aperture radar; two-frequency two-position coherence function; Degradation; Frequency; Image analysis; Ionosphere; Pulse compression methods; Radar polarimetry; Signal analysis; Signal resolution; Spaceborne radar; Synthetic aperture radar; Cross resolution; ionospheric irregularities; range resolution; synthetic aperture radar (SAR); two-frequency and two-position coherence function (TFTPCF);
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2007.894563
