Optical satellite remote sensing transfer calibration method based on near space aerostat

An optical satellite remote sensing transfer calibration method based on a near-space aerostat, comprising:

• performing a temporal-spatial matching between first observation image data of a target region collected by a benchmark radiometric payload and second observation image data of the target region collected by a satellite payload which is mounted, so as to obtain a plurality of matchups of observation image data, wherein the benchmark radiometric payload is carried by the near-space aerostat, and each of the matchups of observation image data comprises the first observation image data and the second observation image data, with matching conducted both in terms of time and spatial location;
• obtaining an average radiance of the benchmark radiometric payload from a plurality of first observation image data within the plurality of matchups of observation image data;
• obtaining an average DN (digital number) captured by the satellite payload in the target region from a plurality of second observation image data within the plurality of matchups of observation image data;
• obtaining a matching radiance for an observation band of the benchmark radiometric payload corresponding to the satellite payload based on the average radiance of the benchmark radiometric payload;
• and
• obtaining a calibration coefficient of the satellite payload based on the matching radiance and the average DN.