The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
1026 
Figure 3. Map is showing areas having snow cover during the 
period June-Aug 2006, i.e. classified by time 
From beginning of June 2006 till end of Aug 2006 
Days having snow cover 
Square kms of snow cover 
(km 2 ) 
8 
25674,5 
16 
5664,25 
24 
1600,5 
32 
662,5 
40 
406,75 
48 
225,5 
56 
153,25 
64 
112,25 
72 
134,75 
80 
136,25 
88 
168,5 
96 
279,5 
Total 
35218,5 
Table 2 Table is showing areas having snow cover during the 
period June-Aug 2006, i.e. classified by time 
Figure 4. Areas having snow cover during the period June- 
Aug,2006 
From beginning of June 2006 till end of Aug 2006 
Days having snow 
cover 
Square kms of snow cover 
(km 2 ) 
96 
279,5 
Table3 Areas having snow cover during the period June- 
Aug,2006 
LANDSAT 
Figure 5. 
4. CONCLUSION 
As a result of this research work, we learned that MODIS snow 
products are easy to use and suitable for seasonal periods for 
many years of snow cover (figure 2,3 and table 2). There is a 
need for comparison study of the data before 2006 and after 
2006. Landsat satellite information has a good distance 
resolution and suitable use in detail research (figure 5). We 
performed glaciers change detection analysis by using different 
satellite data. From the results glacier area is decreasing from 
both satellite data Landsat and MODIS. Future studies should 
be focused not only satellite and ground truth data but should 
also take analysis with synergy of climate data. There is need to 
use of Radar data for snow thickness in the study area. This is 
important information to resolve the pure water resource and the 
balance between glaciers and snow coverage. 
REFERENCES 
George A. Riggs., Dorothy K. Hall., Vincent V. Salomonson., 
2006, MODIS Snow Products User Guide for Collection 4 
Data Products, USA 
LANDSAT: http://glcf.umiacs.umd.edu 
MOD10A2: http://eddaac.usgs.gov/includes/edg_bridge.php 
Ryan Tilsner., 2005, Yoho National Park Galcier, USA 
ACKNOWLEDGEMENT 
The authors would like to thank MODIS data center for 
providing data and NGIC project of Ministry of Environment 
and Nature in Mongolia for the support for ground data 
collection.