[China Instrument Network Instrument R&D] On December 11, China's next-generation geostationary satellite launched the launch of Xingfengyun 4 satellite. The satellite carries the Anhui Institute of Optics and Fine Mechanics and the Shanghai Institute of Technical Physics, Chinese Academy of Sciences The co-developed on-board calibrator has entered the scheduled orbit. The scaler will be the first time for China to calibrate on a full orbital satellite on a geostationary satellite.
The on-board calibrator is mainly used for the main load of Fengyun No. 4 satellite—the calibration and calibration of the multi-channel scanning imaging radiometer solar reflection band sensor. The calibration ensures that the optical remote sensor maintains high accuracy during orbital operation. . The satellites launched by our country mostly adopt the method of terrestrial alternative calibration, which requires the calculation of atmospheric radiation transmission. The uncertainty of radiation calibration is generally 5% to 7%. The Fengyun 4 satellite multi-channel scanning imaging radiometer was equipped for the first time with a solar diffuser on-board satellite scaler based on radiation monitoring. It was accompanied by satellites to perform normalized on-orbit optical radiation calibration for satellite loads in real time. The uncertainty of radiometric calibration is 3% to 5%, which provides a strong guarantee for improving the weather forecast accuracy of Fengyun 4 satellite.
During the stage of satellite launch and lift-off and on-orbit operation, the optical sensor system gradually attenuates due to emission vibration, environmental temperature changes, and space electromagnetic radiation environment, affecting the quantitative accuracy of remote sensor detection. The on-orbit service life of satellites is generally 5 to 8 years. To ensure that the satellite load maintains high quantitative accuracy over its lifetime, scientists have used a variety of methods to correct the accuracy of the instrument in real time. Hefei Research Institute of Anhui Institute of Optics and Energy Research Institute uses sun diffusion plate plus ratio radiation monitoring method, using a constant sun as a calibration light source, combined with high-precision measurement of diffuse reflection plate ground, and monitoring diffusion plate through comparison measurement Provides a high-precision radiation reference for satellite remote sensors, enabling high-precision radiation calibration for all optical paths.
Hefei Research Institute of Anhui Institute of Optoelectronics has been engaged in the research of spectroscopy radiation calibration related technology, is committed to the laboratory spectral radiation standard transmission, optical remote sensing in orbit calibration and on-board calibration method, its results are widely used in China Fengyun series , resource series, environment series, high score series and marine series satellites.
(Original title: Scientific Research Achievements of Hefei Research Institute of Anhui Institute of Machinery Co., Ltd. Launched with Fengyun No. 4 Satellite)
The on-board calibrator is mainly used for the main load of Fengyun No. 4 satellite—the calibration and calibration of the multi-channel scanning imaging radiometer solar reflection band sensor. The calibration ensures that the optical remote sensor maintains high accuracy during orbital operation. . The satellites launched by our country mostly adopt the method of terrestrial alternative calibration, which requires the calculation of atmospheric radiation transmission. The uncertainty of radiation calibration is generally 5% to 7%. The Fengyun 4 satellite multi-channel scanning imaging radiometer was equipped for the first time with a solar diffuser on-board satellite scaler based on radiation monitoring. It was accompanied by satellites to perform normalized on-orbit optical radiation calibration for satellite loads in real time. The uncertainty of radiometric calibration is 3% to 5%, which provides a strong guarantee for improving the weather forecast accuracy of Fengyun 4 satellite.
During the stage of satellite launch and lift-off and on-orbit operation, the optical sensor system gradually attenuates due to emission vibration, environmental temperature changes, and space electromagnetic radiation environment, affecting the quantitative accuracy of remote sensor detection. The on-orbit service life of satellites is generally 5 to 8 years. To ensure that the satellite load maintains high quantitative accuracy over its lifetime, scientists have used a variety of methods to correct the accuracy of the instrument in real time. Hefei Research Institute of Anhui Institute of Optics and Energy Research Institute uses sun diffusion plate plus ratio radiation monitoring method, using a constant sun as a calibration light source, combined with high-precision measurement of diffuse reflection plate ground, and monitoring diffusion plate through comparison measurement Provides a high-precision radiation reference for satellite remote sensors, enabling high-precision radiation calibration for all optical paths.
Hefei Research Institute of Anhui Institute of Optoelectronics has been engaged in the research of spectroscopy radiation calibration related technology, is committed to the laboratory spectral radiation standard transmission, optical remote sensing in orbit calibration and on-board calibration method, its results are widely used in China Fengyun series , resource series, environment series, high score series and marine series satellites.
(Original title: Scientific Research Achievements of Hefei Research Institute of Anhui Institute of Machinery Co., Ltd. Launched with Fengyun No. 4 Satellite)
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