Algorithm to monitor snow cover using AWiFS data of RESOURCESAT-1 for the Himalayan region

被引:93
作者
Kulkarni, A. V. [1 ]
Singh, S. K.
Mathur, P.
Mishra, V. D.
机构
[1] ISRO, Ctr Space Applicat, Marine & Water Resources Grp RESIPA, Ahmedabad 380015, Gujarat, India
[2] Snow & Avalanche Study Estab, Chandigarh 160036, India
关键词
Algorithms - Clouds - Radiation - Remote sensing - Water resources;
D O I
10.1080/01431160500497820
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
Seasonal snow cover is one of the important natural resources of the Himalayas. This is an important parameter in assessing the availability of water in the Himalayan Rivers, forecasting and assessing avalanches and numerous other applications. In the present paper, the normalized difference snow index ( NDSI) technique is discussed to monitor snow cover using an AWiFS sensor on RESOURCESAT-1, a remote sensing satellite recently launched by India. AWiFS is a unique sensor, providing data of 56m spatial resolution at 5-day intervals. Satellite data and field investigations were carried out to assess the correct NDSI value representing snow. This technique is particularly useful for the Himalayan region as it can also be applied under mountain shadow conditions. This is possibly due to reflectance from diffuse radiation in shadow areas. An algorithm is developed to provide changes in the areal extent of snow at intervals of 5 and 10 days. In the 5-daily product, snow extent will be generated scene-wise. In this product, snow and cloud extent will be given. In the 10-daily product, three scenes will be analysed and a basin-wise estimate of the maximum snow extent will be available.
引用
收藏
页码:2449 / 2457
页数:9
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