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欧空局、日本和加拿大分别计划在1992年和1994年发射各自的星载合成孔径雷达卫星(SAR),分别称为欧洲地球资源卫星1号(E-ERS-1),日本地球资源卫星1号(J-ERS-1),和雷达卫星(Radarsat)。与其它被动微波辐射计一样,SAR也是一种全天候的遥感仪器。尽管SAR有全天候的优点,但在目前的三项计划中,SAR的工作特性还是单一的,如C波段的垂直极化方式(Cvv),L波段的水平极化方式(L_(hh))或C波段的水平极化方式(C_(hh))。因此,由这些微波传感器所获得的信息,囿于其仪器的工作性能,应用也受到相应的限制。我们应当对目前的SAR现状有一个正确的理解。本文中主要论述了大雨对SAR、X、C、L、P波段的影响,单参数SAR资料的固有特性,及进一步极化的SAR。
ESA, Japan and Canada plan to launch their respective spaceborne Synthetic Aperture Radar satellites (SARs) in 1992 and 1994, respectively, as European Earth Resources Satellite No. 1 (E-ERS-1), Japan Earth Resources Satellite 1 (J-ERS-1), and Radarsat. Like other passive microwave radiometers, SAR is also an all-weather remote sensing instrument. In spite of the all-weather advantages of the SAR, the operating characteristics of the SAR are still single in the current three programs, such as the C-band vertical polarization (Cvv), L-band horizontal polarization (L_hh) or C-band horizontal polarization (C_ (hh)). Therefore, the information obtained by these microwave sensors, 工 in terms of their instrument performance, application is subject to appropriate restrictions. We should have a correct understanding of the current SAR situation. In this paper, the effects of heavy rainfall on SAR, X, C, L and P bands, the inherent characteristics of single-parameter SAR data and further polarization SAR are discussed.