Applicaton of Spaceborne Imaging Spectrometry CHRIS-in Monitoring of Inland Water Quality
航天成像光谱仪CHRIS在内陆水质监测中的应用

On-board Autonomy(PROBA) satellite,which was developed by the European Space Agency,was launched on October 22,2001.PROBA satellite carries the Compact High Resolution Imaging Spectrometer(CHRIS) with high spatial resolution,hyperspectral resolution and multi-angular image data.CHRIS has five operating modes,among which mode 2 is optimized for water quality research,and has 18 bands in the visible/near-infrared wavelength from 400~1050 nm at a spatial resolution of 17 meters.All the characteristics of CHRIS make CHRIS well suited for inland water quality monitoring.To validate this,a campaign was carried out at Taihu Lake in East China to measure optical parameters of the water and the concentrations of water constituents on October 10,2005.Then,using these data,chlorophyll retrieval algorithm is developed and optimized to the spectral characteristics of the CHRIS sensor.The results of retrieved chlorophyll concentrations from CHRIS images are encouraging.