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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Multisurface Retracker for Swath Processing of Interferometric Radar Altimetry
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Multisurface Retracker for Swath Processing of Interferometric Radar Altimetry

机译：用于干涉雷达测高的条带处理的多表面跟踪仪

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摘要

Swath mode processing of CryoSat-2 Synthetic Aperture Radar Interferometric (SARIn) mode has been used to monitor elevation of areas with complex topography such as over ice sheet and ice cap margins. Swath processing relies on an accurate measure of the angle of arrival of the measured echo and, therefore, requires custom strategies in order to resolve the ambiguous phase measurement. In mountainous regions of complex terrain, it may be necessary to apply different phase ambiguities across a waveform record when returns come from different scatters distributed perpendicularly to the CryoSat-2 ground tracks. In this letter, we present modifications to the conventional swath processing method whereby a multisurface retracker is first applied to the record in order to identify potential different scattering surfaces. Phase ambiguity is then independently resolved for each of these subsurfaces. The improvements with this new method over the Karakoram glaciers are a 10% increase in the number of measurements with improvements of almost 50% for individual glaciers and a reduction in the median absolute deviation of the elevations from 20.18 to 14.69 m.
机译：CryoSat-2合成孔径雷达干涉（SARIn）模式的条带模式处理已用于监视地形复杂的区域的海拔，例如冰盖和冰帽边缘。扫描处理依赖于对所测回波的到达角的精确测量，因此，需要自定义策略来解决模棱两可的相位测量。在复杂地形的山区，当来自垂直于CryoSat-2地面轨迹的不同散射的回波来自波形记录时，可能有必要对波形记录应用不同的相位模糊度。在这封信中，我们介绍了对常规条带处理方法的修改，其中首先将多表面跟踪器应用于记录以识别潜在的不同散射表面。然后针对这些次表面中的每个独立地解决相位模糊性。与喀喇昆仑冰川相比，这种新方法的改进之处是测量数量增加了10％，单个冰川的改进量几乎达到了50％，海拔高度的中值绝对偏差从20.18降低到14.69 m。

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