天山地区SAR数据雪盖制图研究

A Study of Snow-cover Mapping with SAR Image in the Tianshan Mountains

在分析合成孔径雷达（ＳＡＲ）成像机理及雪盖参数散射特性的基础上，利用航天飞机搭载的成像雷达（ＳＩＲ－Ｃ）获取的天山Ｃ波段、多极化ＳＡＲ数据，进行提取雪盖信息的实验。数据通过预处理、散射系数图像的计算、去噪、入射角改正等处理后，利用ＢＡＹＥＳ监督分类方法产生该地区的雪盖分类图。实验结果表明，利用多波段。

According of the imaging principle of Synthetic Aperture Radar and back-scattering characteristics of snow, authors examined the capability of snow-cover mapping with multifrequency and multipolarized SAR images from SIR- C carried by shuttle The snow -cover can be mapped after a serial image proceeding on SAR data in the Tianshan Mountains The result shows that C-band HH and VV images can be used to discriminate between wet-snow and snow-free area, and cross -polarized SAR images of C-band can be used to discriminate between dry-snow and bare ground So the SAR data can be used to map snow-cover