On-orbit error correction system and method for hot mirror backlobe of spaceborne microwave imager

Abstract

The present invention provides a hot mirror backlobe on-orbit error correction system and method for a space-borne microwave imager. The radiation amount acquisition module and the hot mirror backlobe error acquisition module provide parameters; S2: the hot mirror backlobe pointing position acquisition module obtains the hot mirror backlobe pointing position according to the aforementioned parameters, and transmits the position to the earth Radiation acquisition module; S3: the earth radiation acquisition module obtains the earth radiation corresponding to the hot mirror back lobe pointing position according to the aforementioned parameters and positions, and transmits the earth radiation to the hot mirror back lobe error Acquisition module; S4: the hot mirror backlobe error acquisition module obtains the backlobe error of the hot mirror according to the aforementioned parameters and the amount of earth radiation. The invention can effectively and accurately obtain the on-orbit thermal mirror backlobe error of the spaceborne microwave imager, is scientific and reasonable, and is easy to implement.

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...

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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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