Estimation of snow cover over large mountainous areas using Radarsat ScanSAR

被引：0

作者：

Haefner, H. ^{[1
]}

Small, D. ^{[1
]}

Biegger, S. ^{[1
]}

Hoffmann, H. ^{[1
]}

Nüesch, D. ^{[1
]}

机构：

[1] Remote Sensing Laboratories, Department of Geography, University of Zürich, Winterthurerstrasse 190, Zürich CH-8057, Switzerland

来源：

IAHS-AISH Publication | 2000年 / 267期

关键词：

Meteorology; -; Monitoring; Snow;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

As part of our general objective to develop and operationalize methods for snow monitoring in high mountain terrain, the possibilities of snow cover mapping over large mountainous areas-e.g. almost the entire Swiss Alps and Pre-Alps-using Radarsat ScanSAR, and NOAA-AVHRR for comparison, are evaluated. The generation of snow masks in AVHRR scenes is achieved using a simple threshold-based method. A change detection approach is employed to compare the two SAR-scenes. It is expected that the most important differences will result from vast changes in the snow cover. Since large parts of the Swiss Plateau were also snow covered in the winter scene, other changes in land cover are expected to have only minor influence. Hence, it will be possible to assess the total snow cover by combining the information gained from the SAR ratios with the relief information from the DEM. Results from the two sensors are compared with each other, and with ground-based meteorological observations. Verification using a finer temporal resolution is desirable.

引用

页码：333 / 338