System and method for correcting on-orbit error of heat mirror dorsal valve of satellite-borne microwave imager

Abstract

The invention provides a system and method for correcting on-orbit error of a heat mirror dorsal valve of a satellite-borne microwave imager. The method comprises the following steps: S1, a heat mirror relevant parameter module provides parameters for a heat mirror dorsal valve orientation position acquisition module, an earth radiation quantity acquisition module and a heat mirror dorsal valve error acquisition module; S2, the heat mirror dorsal valve orientation position acquisition module acquires the orientation position of the heat mirror dorsal valve according to the parameter, and transmits the position to the earth radiation quantity acquisition module ; S3e , the earth radiation quantity acquisition module acquires the earth radiation quantity corresponding to the orientation position of the heat mirror dorsal valve according to the parameter and the position, and sends the earth radiation quantity to the heat mirror dorsal valve error acquisition module; and S4, the heat mirror dorsal valve error acquisition module acquires the heat mirror dorsal valve error according to the parameter and the earth radiation quantity. By adoption of the method provided by the invention, the on-orbit error of the heat mirror dorsal valve of the satellite-borne microwave imager can be acquired effectively and precisely; and moreover, the method is scientific and reasonable, and is easyto realize.

Description

technical field [0001] The invention relates to the technical field of aerospace remote sensing, in particular to an on-orbit error correction system and method for a hot mirror backlobe of a spaceborne microwave imager. Background technique [0002] By measuring surface and atmospheric radiation information, microwave imagers can retrieve parameters such as temperature, wind speed, sea ice, snow cover, soil moisture, and precipitation, and are widely used in the detection of atmosphere, ocean, and land environments. Whether the microwave imager can obtain accurate and effective surface brightness temperature remote sensing data when it is in orbit mainly depends on the calibration accuracy of the microwave imager. Therefore, in order to obtain accurate and effective remote sensing data of surface brightness temperature, it is necessary to greatly improve the calibration accuracy of the microwave imager. [0003] In the traditional calibration process, the brightness temper...

AI Technical Summary

Problems solved by technology

However, the brightness temperature of the heat source is also affected by the effective radiation received by the back lobe of the hot mirror, so in order to improve the calibration accuracy of the microwave imager, it is very necessary to accurately calculate the error caused by the back lobe of the hot mirror

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