SPECTRAL REFLECTANCE MEASUREMENTS AT THE CHINA RADIOMETRIC CALIBRATION TEST SITE FOR THE REMOTE SENSING SATELLITE SENSOR

A comprehensive field experiment was made with the support of the project of China Radiometric Calibration Site (CRCS) during June-July 1999.Ground reflectance spectra were measured at Dunhuang Calibration Test Site in the experiment.More than two thousands of spectral curves were acquired in a 20km×20km area.The spectral coverage is from 350 nm to 2500 nm.The measurement values show that reflectance is between 10% and 33% at the VIS-SWIR spectral region.The standard deviation of reflectance is between 1.0% and 2.0% for the spectral range.Optical characteristics and ground reflectance measurements at the Dunhuang test site,result analysis and error source were described.In addition,a comparison of the reflectance obtained in 1999 with those measured in 1994 and 1996 was also made.