Satellite full optical-path radiation beaconing method

Abstract

The invention discloses an on-satellite all-light path radioactive calibrating method, including high accuracy spectrum radioactive brightness meter satellite-carried multi-spectrum camera and bracket installed on a satellite platform, where the bracket is installed with motor-driven diffuse reflecting white plate, the above brightness meter and the satellite-carried multi-spectrum camera are installed on the same plane on the satellite platform and the directions of their light paths are the same, it uses a rotating motor to drive the above white plate rotationally move rightward to avoid the light path of the multi-spectrum camera, and here, this camera can relatively obverse earth object; once the white plate rotationally restores to actual shown position, it can realize all-light path calibration for the multi-spectrum camera. It can realize high accuracy calibration for on-satellite camera response by uncertainty less than 3%.

Description

technical field [0001] The invention belongs to the field of optical radiation measurement, in particular to an on-board all-optical-path radiation calibration method. Background technique [0002] At present, satellite applications are getting deeper and deeper into all aspects of social life. In my country alone, in addition to reconnaissance satellites for military purposes, there are communication satellites, meteorological satellites of the Fengyun series, resource satellites, and ocean satellites for civilian use. In addition to communication satellites, other satellites can be collectively referred to as remote sensing satellites, all of which are equipped with imaging or non-imaging optical sensors to obtain images or spectral information of sky, ground and ocean targets. All optical instruments have been calibrated and calibrated on the ground in order to make the obtained information true and reliable before launching into space. However, once in the air, due to ...

AI Technical Summary

Problems solved by technology

[0003] The internal calibration device on the star can usually only calibrate part of the optical path of the instrument to be calibrated. For example, the main mirror of the camera cannot be calibrated, which will affect the calibration accuracy; at the same time, the bromine tungsten lamp as the light source changes with the environment. With the passage of time, its output will inevitably change, which makes the accuracy of calibration and calibration difficult to evaluate; the ground target is affected by the atmosphere, so the calibration accuracy is limited, and the current level can only reach about 90%

[0004] For the increasingly high quantitative requirements of modern remote sensing applications, some existing devices and methods for calibration and calibration of optical sensors on the planet have become relatively insufficient

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