Abstract: HJ1 is the first small satellite constellation which dedicated to environment and disaster monitoring and forecasting in China. The land surface temperature (LST) over the arid regions were calculated by using the China Centre for Resources Satellite Data and HJ1B data, and the vegetation supply water index (VSWI) was obtained by fitting method with the aid of the normalized difference vegetation index (NDVI) of different underlying surface. Drought monitoring was studied by using VSWI in Longlin county, Tianlin county and Xilin county. The results showed that drought monitoring with the aid of HJ1B data was a credible way. HJ1 was wide image width and relative high spatial resolution, which could provide decision support services for drought monitoring.

Key words: HJ1 satellite, Drought monitoring, Guangxi province