Recently, under the leadership of the National Satellite Meteorological Center of China Meteorological Administration, AIOFM optical remote sensing center participated in China remote sensing satellite radiation calibration experiments, carried out measurement of surface bidirection reflectance and continuous observation of atmospheric optical properties at Dunhuang radiation calibration site and accomplished the tasks successfully.
The measurement results of Dunhuang test will be applied to on orbit calibration for FY3A, FY3B, and FY1D (FY series) weather satellite, and to provide the surface reflection characteristics and the basic parameters of atmospheric optical properties for calculating the optical radiation flux received by optical payload on orbit. It is helpful to improve the accuracy of in-orbit calibration.
AIOFM researchers brought three sets of observation equipment (subject to National Satellite Meteorological Center commissioned, developed independently) to participate in this test. Since 2007, the bidirectional reflection distribution function measurement system has been repeatedly used in joint trials. These test sites includes Inner Mongolia, Xinjiang, Gansu and other places, where conditions are extremely difficult. The staff and equipment have undergone the severe tests and completed the test task successfully. The other two devices which were developed by Optical Remote Sensing Center of AIOFM using the latest technology, highlighted the accuracy and reliability. During the trial period, these instruments underwent high temperatures, strong dust, and long time of continuous work, observed and obtained absolute irradiance of the field, atmospheric optical thickness, ratio of diffuse-to-global and other parameters. The results proved rationality, advance and reliability on design of these equipments.
Three equipments of AIOFM participating the test