Method for measuring position information of carrier relative to sun by using sun sensor

Abstract

The invention relates to a method for measuring position information of a carrier relative to the sun by using a sun sensor, the method is based on the new sun sensor for measuring the velocity difference of the edge of the sun, and the new sun sensor can simultaneously acquire the apparent direction of the sun and the included angle theta of the apparent direction of the sun and the rotation axisof the sun. The sun sensor uses four spectrometers to measure the velocity difference between two sets of mutually-perpendicular points on the disk edge of the sun, and obtains the apparent directionof the sun from the direction of the central axis. Based on a solar rotation model and a projection principle, a function relationship between the velocity difference and the included angle theta ofthe apparent direction of the sun and the rotation axis of the sun is established, and the included angle theta can be solved. Compared with a traditional sun sensor which can only provide the attitude information of the carrier relative to the sun, the sun sensor can also provide the position information of the carrier relative to the sun.

Description

technical field [0001] The invention belongs to the field of autonomous navigation of spacecraft, and relates to a method for measuring the position information of a carrier relative to the sun by using a sun sensor. Background technique [0002] The traditional method of measuring the attitude of the sun generally uses a sun sensor, which measures the angle between the sun's line of sight and a certain body axis of a spacecraft such as a satellite through its sensitivity to solar radiation. Companies and research institutions that develop solar sensors are almost all over the world, such as the analog solar sensor developed by GOODRICH in the United States, the line array CCD solar sensor of Russia's "RPE OPTECS", and the APS solar sensor of TNO-TPD in the Netherlands. The types have developed from analog and digital to various new digital types, but no matter what type of sun sensor, it can only provide the attitude information of the carrier relative to the sun. [0003]...

AI Technical Summary

Problems solved by technology

Companies and research institutions that develop solar sensors are almost all over the world, such as the analog solar sensor developed by GOODRICH in the United States, the line array CCD solar sensor of Russia's "RPE OPTECS", and the APS solar sensor of TNO-TPD in the Netherlands. The type has developed from analog and digital to various new digital types, but no matter what type of sun sensor it is, it can only provide the attitude information of the carrier relative to the sun

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