Whole-Process Radiometric Calibration of Optical Remote Sensors
卫星光学传感器全过程辐射定标

Whole-process radiometric calibration of optical remote sensors is testing and calibrating sensor through their lifetime.It includes testing and calibrating sensor with indoor artificial radiation sources or outdoor natural radiation sources in the research and development process and establishing on-board calibration system apparatus which will be used as periodically absolute and relative calibration for sensors being working after launch.Moreover,whole-process radiometric calibration of optical remote sensors also includes vicarious calibration based on land(or sea)surface and cross-calibration with other satellite sensor.At last,the result of calibration can be used as a criterion determining whether a sensor is out of function or not.Whole-process radiometric calibration is an experiment process.The intention is to aggrandize its application and aim is improving its accuracy.Some calibration systems and techniques have been developed for whole process radiometric calibration based on standard and standard transfer.The research works in our laboratory involve all contents of whole process radiometric calibration.We will introduce that completely.Improving calibration accuracy depends not only on hardware such as high accuracy cryogenic radiometer,transfer standard detector,integrating sphere and standard panel but also on techniques such as error source analysis and control in standard transfer process,determination of atmospheric radiative fluxes model and relational experiment,etc.