Lunar positioning method for slit type spectrometer

Abstract

The invention relates to a lunar calibration method, and provides a lunar positioning method for a slit type spectrograph in order to solve the technical problems that when foundation lunar observation is conducted through cooperation of the slit type spectrograph, an equatorial telescope and a guide star mirror, spectral image transformation is established, the right ascension and declination coordinate transformation corresponding relation of the equatorial telescope is difficult, and consequently the observation error is large. By establishing the corresponding relationship between the moonimage change of the slit type spectrometer and the right ascension coordinate and declination coordinate change of the equatorial telescope serving as the rotary table, the equatorial telescope can be accurately corrected in the moon positioning process, so that the pointing error of the equatorial telescope is avoided, the moon calibration accuracy is improved, and the problem of accurate moon positioning of the slit type spectrometer is solved.

Description

technical field [0001] The invention relates to a moon calibration method, in particular to a moon positioning method for a slit spectrometer. 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] At present, a slit-type spectrometer and an equatorial mount are often used for lunar calibration. The equatorial mount is a commonly used astronomical observation device, and its function is to offset the influence of the earth's rotation on astronomical observations. The ground-to-moon observation system chooses the equatorial mount as a turntable for stably trac...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that it is difficult to establish spectral image transformation and the corresponding relationship between right ascension and declination coordinate transformation of the equatorial mount when the slit-type spectrometer, equatorial mount and guide mirror are used to coordinate the observation of the moon on the ground, resulting in large observation errors. , providing a slit-type spectrometer positioning method for the moon

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