Capabilities and limitations of the interferometric cartwheel

被引:167
作者
Massonnet, D [1 ]
机构
[1] French Space Agcy, CNES, F-31401 Toulouse 4, France
来源
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2001年 / 39卷 / 03期
关键词
antenna arrays; cooperative satellites; jamming; multistatic scattering; superresolution; synchronization; synthetic aperture radar (SAR); terrain mapping; vegetation; velocity measurement;
D O I
10.1109/36.911109
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Quasi-simultaneous radar images can be produced by a low cost system using a set of passive receivers onboard a constellation of microsatellites in a special orbital configuration. The combination of these images can improve the final resolution in range and azimuth and systematically produce across-track and along-track interferometric data. Here we review some of the technical particularities of these systems linked to 1) the system, such as the pulse scheduling, the orbital geometry, and the required pointing and positioning, and 2) the image quality, such as the ambiguity level, the required clock stability, the effect of varying baselines at various scales, focusing to higher resolution, and geometric limitations, mainly the behavior of the coherent combinations over terrain with high slopes. We illustrate three applications of the concept in cooperation with the radar onboard the Japanese ALOS satellite, the ASAR instrument onboard the European ENVISAT, and as a study-case for defense applications of the concept. We envision even more innovative applications of the concept, for instance in simultaneous polarimetry and interferometry.
引用
收藏
页码:506 / 520
页数:15
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