Pre-launch Calibration Technology of DQ-1 Wide-Field Imaging Spectrometer
As a scientific research satellite in the national civil space infrastructure planning,the quantitative development for the atmospheric environment monitoring satellite will be more and more important for the application of space remote sensing.As the main instrument for the atmospheric environment monitoring satellite,the wide-field imaging spectrometer can achieve the multi-spectral information about the land surface and atmosphere in the spectral range from visible light to long-wave infrared bands(0.415～12 μm).The 45° scanning mirror and racemic system is used for the scanning imaging,and the coaxial telescope system is applied to the optical structure to simultaneously obtain ultra-wide and high spatial resolution imaging from the ground with 21 spectral bands on the focal plane of the three detectors.To accurately obtain the quantitative relationship between the radiance and the instrument response,the full-optical path and full-aperture radiometric calibration tests are carried out for the wide-field imaging spectrometer before the satellite launches.The integrating sphere calibration in the visible short-wave spectrum and the vacuum infrared calibration in the medium and long wavelength bands are introduced,respectively,which provides a good guarantee for the quantitative application of users.During the calibration process,the error sources and calibration accuracy in the transfer path are analyzed and evaluated.
国家科技期刊平台
NSTL
万方数据
维普
