大气折射对InSAR影响的定量分析

QUANTITATIVE ESTIMATION OF EFFECT OF ATMOSPHERIC REFRACTION ON INSAR

星载SAR重复轨道干涉利用不同时间观测的SAR影像数据形成干涉图 ,干涉相位中包含有成像几何、大气、地形以及地面形变等信息。为此 ,分析了干涉图中大气参数 (气压、温度与相对湿度 )对干涉相位的影响 ,计算了参数变化对干涉相位、高程与形变误差的影响量 ,并以图形方式描述了分析结果。

Spaceborne SAR repeat pass interferometry is a technique based on the exploitation of the interference pattern of two SAR images acquired in similar geometric conditions, at two different times. The interferogram contains geometric, atmospheric, topographic and land deformation information. This paper focuses on atmospheric effects on SAR interferometry. It shows theoretically that the relationship among ionosphere TEC and troposphere parameters such as temperature, relative humidity and pressure with respect to relative interferometric phase changes, and visualize the magnitude of these effects.