Radiation Performance Assessment And Radiation Normalization For Reflected Band Of Geostationary Satellite

Geostationary satellites play an extremely important role in monitoring the global environment and climate change.The range of the earth surface that a single geostationary satellite can cover is limited.In order to produce global products by using geostationary satellite data,the data of multi-source geostationary satellites needs to be used for collaborative production.In addition,some sensors do not have on-board calibration equipment,causing not to timely monitor and calibrate the changes in sensor radiation performance.Therefore,to produce global quantitative remote sensing products based on geostationary satellite data,it is necessary to evaluate the radiation performance of sensors and implement radiation normalization of multiple sensors.At present,the study of infrared channel is more than that of visible channel.This paper aims to study the Deep Convective Cloud(DCC)with high reflectivity and stability,good properties of the lambert body and little influence of weather conditions.Based on the time series image data,the radiation performance of the visible light channels of FY2 E,Meteosat-9,MTSAT-2 and GOES-13 are evaluated.Based on the reference of Aqua/MODIS with stable radiation performance,the radiation normalization of the stationary satellite visible light channel data is implemented.The main work and conclusions of this paper are as follows:1)Based on the DCC target,qualitative and quantitative evaluation of the radiation performance of the visible light channel of FY2 E,Meteosat-9,MTSAT-2 and GOES-13 geostationary satellites is carried out.The results show that the radiation properties of visible light channels of all satellites have varying degrees of attenuation,GOES-13 has the smallest attenuation,next is Meteosat-9,FY2 E and MTSAT-2 both have larger attenuation degrees than Meteosat-9 and GOES-13.Meteosat-9 is the most stable,the stabilization of FY2 E and MTSAT-2 is lower than Meteosat-9,GOES-13 is the least stable.2)Based on the MODIS time series data,the visible light channels of the geostationary satellites FY2 E,GOES-13,MTSAT-2 and Meteosat-9 are radially normalized.Compared with MODIS data,visible light channel of GOES-13 has the lowest total radiation attenuation,Meteosat-9 has the best radiation stability,while MTSAT-2 and FY2 E are both poor in total radiation attenuation and radiation stability.The radiation normalization results in this paper can effectively correct the attenuation and fluctuation of the radiation performance of FY2 E and MTSAT-2 satellites and provide data basis for the cooperative inversion of quantitative remote sensing products of multisource geostationary satellites.3)The paper developed a radiation performance evaluation module of stationary satellite visible light channels.Input parameters for evaluation of satellite and the reference satellite image data,the module can automatically select DCC target to complete the stationary satellite visible light channel radiation performance evaluation,evaluation results are of great significance to the quantitative application of remote sensing data and the design of the next generation geostationary satellite sensors.