Azimuth variation in microwave backscatter over the Greenland Ice Sheet

IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217) Pub Date : 2001-07-09 DOI:10.1109/IGARSS.2001.977069

I.S. Ashcraft, D. Long

引用次数: 8

Abstract

Scatterometer backscatter measurements are becoming an important tool for monitoring the dynamic behavior of the Greenland Ice S heet. However, most Greenland studies assume constant backscatter for varying azimuth angles. Detailed analysis of scatterometer data sets show non-negligible (1-2 dB) azimuth modulation. The magnitude and orientation of the azimuth modulation observed by SeaWinds, NSCAT, and ERS are documented herein. The dominate factor is second order azimuth modulation, which is largest for C-band (ERS). For SeaWinds, the h-pol azimuth modulation is larger than for v-pol.

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格陵兰冰盖上微波反向散射的方位角变化

散射计的后向散射测量正成为监测格陵兰冰盖动态行为的重要工具。然而，大多数格陵兰岛研究都假设不同方位角的后向散射恒定。散射计数据集的详细分析显示不可忽略的(1- 2db)方位调制。本文记录了海风、NSCAT和ERS观测到的方位调制的大小和方向。主要的影响因素是二阶方位调制，在c波段(ERS)最大。对于SeaWinds, h-pol的方位调制比v-pol的要大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)

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