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APS digital sun sensor sun angle calculating method and system

A technology of a solar sensor and a calculation method, which is applied in the field of APS digital solar sensor solar angle calculation method and system, can solve the problems of large error and affect the accuracy of satellite attitude determination, etc. Effect

Active Publication Date: 2017-01-04
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

Generally, the sun angle is directly calculated according to the sun spot position and focal length output by the sun sensor. Due to the influence of the internal structure of the APS (Advanced Photo System, Advanced Imaging System) digital sun sensor, the error will increase when the sun angle is larger. Large, which greatly affects the accuracy of satellite attitude determination

Method used

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  • APS digital sun sensor sun angle calculating method and system
  • APS digital sun sensor sun angle calculating method and system
  • APS digital sun sensor sun angle calculating method and system

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Embodiment Construction

[0030] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, the invention discloses a method for calculating the sun angle of an APS digital sun sensor, wherein the method for calculating the sun angle specifically includes the following steps:

[0032] S1. Read the sun spot position of the digital sun sensor.

[0033] S2. Based on the sun spot position, calculate the initial solar incidence angle α according to formulas (1), (2) and (3) 0 :

[0034] X=CentX-X c (1)

[0035] Y=CentY-Y c (2)

[0036] α 0 = a r c t a n ( X 2 + Y 2 f ) - - - ( 3 ...

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Abstract

The invention discloses an APS digital sun sensor sun angle calculating method. The sun angle calculating method comprises the steps that the sun facula position of a digital sun sensor is read; an initial sun incidence angle is calculated according to the sun facula position; iterative computation is performed by combining the initial sun incidence angle with the calibration parameters of the digital sun sensor to obtain a sun incidence angle; a corrected two-dimensional sun angle is calculated. The APS digital sun sensor sun angle calculating method greatly improves the sun angle calculation accuracy through sun angle correction and iterative computation of the sun sensor and facilitates improvement of satellite attitude precision.

Description

technical field [0001] The invention discloses a method for calculating the sun angle, and in particular relates to a method and system for calculating the sun angle of an APS digital sun sensor. Background technique [0002] The digital sun sensor is a necessary configuration of the satellite, and the output accuracy of the sun angle of the sun sensor affects the determination accuracy of the satellite attitude angle. Generally, the sun angle is directly calculated according to the sun spot position and focal length output by the sun sensor. Due to the influence of the internal structure of the APS (Advanced Photo System, Advanced Imaging System) digital sun sensor, the error will increase when the sun angle is larger. Large, which greatly affects the accuracy of satellite attitude determination. Therefore, it is necessary to propose a sun angle calculation method to improve the accuracy according to the internal error transfer relationship of the sun sensor. Contents of...

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Application Information

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IPC IPC(8): G01C21/02G01C21/20
CPCG01C21/025G01C21/20
Inventor 何益康马雪阳沈怡颹余维杨真谢任远李苗周连文朱晏庆
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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