Low earth orbit satellite passive moon calibration opportunity calculation method and system

Abstract

The invention discloses a low earth orbit satellite passive moon calibration opportunity calculation method and system. The method comprises the following steps: establishing an STK simulation scene; constructing three vectors in the STK simulation scene, wherein the first vector is a cold air view field starting vector, the second vector is a cold air ending vector, and the third vector is a vector from a satellite body to the moon; obtaining and outputting real-time angle values of an included angle alpha 1, an included angle alpha 2 and an included angle theta 3 in real time, wherein the included angle alpha 1 is the included angle between the first vector and the third vector, the included angle alpha 2 is the included angle between the second vector and the third vector, and the included angle theta 3 is the included angle between the first vector and the second vector; and according to the real-time angle values of the included angle alpha 1, the included angle alpha 2 and the included angle alpha 3, determining the relationship among the included angle alpha 1, the included angle alpha 2 and the included angle theta 3, and determining the moon calibration opportunity. According to the method, parameters such as lunar calibration opportunity are analyzed, and data support is provided for long-term monitoring of the stability of a remote sensing satellite detector and subsequent establishment of a Chinese lunar radiation model.

Description

technical field [0001] The invention belongs to the technical field of satellite remote sensing, and in particular relates to a method and system for calculating timing of passive moon calibration of low-orbit satellites. Background technique [0002] Foreign MODIS, SeaWiFS, Pleiades, GOES, etc., as well as MERSI of the domestic Fengyun-3 satellite, all have in-orbit and monthly calibration capabilities. The on-orbit moon calibration mode of the satellite is divided into active mode and passive mode. The active mode requires the satellite to actively perform attitude maneuvering or load swing mirror pointing tracking, and adjust the detector field of view to point to the moon for imaging calibration. Although the calibration cycle and calibration efficiency are more High, but strict requirements on the satellite working mode and task arrangement, some satellites cannot adopt the active mode due to reasons such as attitude maneuverability and load mode. Contents of the inve...

AI Technical Summary

Problems solved by technology

The on-orbit moon calibration mode of the satellite is divided into active mode and passive mode. The active mode requires the satellite to actively perform attitude maneuvering or load swing mirror pointing tracking, and adjust the detector field of view to point to the moon for imaging calibration. Although the calibration cycle and calibration efficiency are more High, but strict requirements on satellite working mode and task arrangement, some satellites cannot adopt active

Images