Method for obtaining full-lunar phase period lunar disc irradiance of slit type spectrometer

Abstract

The invention relates to a method for obtaining the lunar disc irradiance, and provides a method for obtaining the full-lunar phase period lunar disc irradiance of a slit type spectrometer in order tosolve the technical problems that according to an existing method for obtaining lunar irradiation data through a foundation-to-moon observation system, only the circle center and the radius of a lunar contour area can be accurately obtained at the full-moon moment, and the full-lunar phase period lunar irradiation data cannot be obtained. The method comprises the steps that S1, scanning data of the slit type spectrometer are preprocessed, and a lunar spectral data cube is obtained; S2, a characteristic wave band grey-scale map is obtained from the lunar spectral data cube; S3, a lunar binaryimage is extracted from the characteristic wave band grey-scale map through a threshold segmentation method; S4, boundary points of the lunar binary image are obtained through integral operation; S5,the lunar phase period is judged; S6, according to the lunar phase period, the lunar contour is obtained from the characteristic wave band grey-scale map through a three-point method by means of the boundary points of the lunar binary image; and S7, full-lunar irradiance integration is carried out on the area in the lunar contour, and the lunar disc irradiance is obtained.

Description

technical field [0001] The invention relates to a method for obtaining lunar disk irradiance, in particular to a method for obtaining lunar disk irradiance for a slit-type spectrometer in a full lunar phase cycle. Background technique [0002] Traditional calibration methods have reached a bottleneck in improving the radiation accuracy of aerospace remote sensor data. As a highly stable radiation source, the moon has become a research consensus at home and abroad to carry out on-orbit calibration to the moon. Relying on ground-based lunar observations to establish a lunar radiation model for the full lunar phase cycle is of great significance for on-orbit lunar calibration. [0003] The ground-based lunar observation system uses a slit-type spectrometer as the lunar radiation observation equipment, and an equatorial mount as a turntable for stably tracking the moon. The acquisition method is that the equatorial mount moves to the future position of the moon. The slit is perp...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the current method of obtaining lunar radiation data through the ground-based lunar observation system can only accurately calculate the center and radius of the lunar contour area at the time of full moon, and cannot obtain the lunar radiation data of the full moon phase cycle. Provides a method for obtaining the irradiance of the lunar disc in the whole lunar phase cycle of a slit spectrometer

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