A first approach to automatic monitoring prodedure of case II water quality from HJ-1 satellite images

This paper creates an operational swift solution for automatic analyzing water quality in case II waters. The HJ-1 satellites of China was successfully launched, this provides a good opportunity for case II water (inland and coastal water) environment monitoring. However, there is no operational monitoring system in China and abroad. The traditional processing methods were developed for expert users, which including many complex operations and user interaction, not suitable for business operation. To overcome this problem, an automatic monitoring procedure was developed by us. With this approach, one can get monitoring reports from original HJ-1 satellites images or MODIS images with ¿one-click¿. That means, you do not have to concern the complex data processing procedure, and what you need to do is specify the water quality monitoring area, the specific space-borne sensor and the remote sensing images. According to the study area, sensor type and image file, the operational procedure will automatically get parameters from the integrated XML files and database indexed by area and sensor type. The processing procedure does not need any user intervention, which greatly improve the processing efficiency. This paper gives a complete flow chart of data processing in the automatic monitoring mode using XML files and databases. Moreover, in order to verify the ability of the operational monitoring approach, experiments were conducted in Tai´hu, Chao´hu, and Dian´chi lakes using MODIS QKM images and the HJ-1 multi-spectral images. Tests show both the efficiency and accuracy of this approach is relatively high.