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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Analysis and evaluation of the NASA/JPL TOPSAR across-track interferometric SAR system
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Analysis and evaluation of the NASA/JPL TOPSAR across-track interferometric SAR system

机译：NASA / JPL TOPSAR跨轨干涉SAR系统的分析与评估

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摘要

The authors have evaluated the accuracy of digital elevation models (DEMs) generated by the JPL/NASA TOPSAR synthetic aperture radar interferometer instrument by acquiring topographic radar data in the summer of 1992 over the National Training Center, near Ft. Irwin, California, and comparing the measurements to a very accurate digital elevation model derived for this area by the U.S. Army Topographic Engineering Center (TEC). Fiducial corner reflectors were deployed in the area, and their locations were determined to cm accuracy by the Defense Mapping Agency (DMA). DEMs generated from the acquired radar data were rotated and translated to precisely overlay the reference DEM, allowing an analysis of the achieved height accuracy. The authors present a detailed description of horizontal and vertical errors and their characteristics. The standard deviation measured over a 5.6/spl times/7 km area was approximately 2 m, the corresponding figures for relatively flat areas were in the 1-2 meter range and for mountainous areas in the 2-3 meter range, consistent with theoretical expectations. The authors also discuss key factors that presently limit the system performance.
机译：作者评估了JPL / NASA TOPSAR合成孔径雷达干涉仪仪器生成的数字高程模型（DEM）的准确性，方法是在1992年夏季从Ft附近的国家培训中心获取地形雷达数据。加利福尼亚州欧文（Irwin），并将测量结果与美国陆军地形工程中心（TEC）针对该区域得出的非常精确的数字高程模型进行比较。基准角反射器已部署在该区域中，其位置由国防测绘局（​​DMA）确定为厘米级精度。从获取的雷达数据生成的DEM进行旋转和平移，以精确覆盖参考DEM，从而可以分析所获得的高度精度。作者详细介绍了水平和垂直误差及其特征。在5.6 / spl次/ 7 km区域内测得的标准偏差约为2 m，相对平坦区域的相应数字在1-2米范围内，山区在2-3米的范围内，与理论预期一致。作者还讨论了目前限制系统性能的关键因素。

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