Addresses the steps necessary to determine and maintain the phase calibration of a two-channel interferometric synthetic aperture radar (IFSAR). The method, setup, and accuracy of four different calibration techniques are compared. The most novel technique involves pointing the interferometric baseline at nadir and imaging a lake surface. The other techniques include measuring various flat surfaces in traditional side-looking IFSAR maps, in-flight closed-loop calibration path measurements, and static laboratory measurements. Initial results indicate that, using combinations of these measurements, it is possible to maintain the interferometric phase calibration of Sandia National Laboratories' K/sub u/ Band IFSAR to better than 3 degrees. The time variability of various parts of the calibration and requirements for recalibration are also discussed.
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机译：解决确定和维持两通道干涉式合成孔径雷达（IFSAR）的相位校准所需的步骤。比较了四种不同校准技术的方法，设置和准确性。最新颖的技术涉及将干涉基线对准最低点并成像湖泊表面。其他技术包括在传统的IFSAR侧视图中测量各种平面，飞行中的闭环校准路径测量以及静态实验室测量。初步结果表明，使用这些测量值的组合，可以将桑迪亚国家实验室的K / sub u / Band IFSAR的干涉仪相位校准保持在3度以上。还讨论了校准各个部分的时间可变性以及重新校准的要求。
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