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Method used for measuring pointing direction of satellite high precision optical sensitive load

A technology of sensitive loads and measurement methods, which is applied in the directions of measuring devices, measuring angles, surveying and navigation, etc.

Active Publication Date: 2017-05-31
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a sensitive load pointing measurement method based on a high-precision photoelectric angle measurement system, which solves the high-precision pointing measurement of angular second-level angle changes caused by thermal deformation of satellite optical sensitive loads need

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  • Method used for measuring pointing direction of satellite high precision optical sensitive load
  • Method used for measuring pointing direction of satellite high precision optical sensitive load
  • Method used for measuring pointing direction of satellite high precision optical sensitive load

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[0015] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0016] figure 1 As shown, the pointing measurement method of a satellite high-precision optical sensitive load provided by the present invention first uses the angle measurement system to measure the pitch angle and yaw angle of the two orthogonal direction vectors of the sensitive load prism under different temperature loads, Then use mathematical expressions to describe the expression of the prism unit vector in the local coordinate system of the sensitive load, and then calculate the expression of th...

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Abstract

The invention provides a method used for measuring pointing direction of satellite high precision optical sensitive load. According to the method, an angle measuring system is used for measuring the pitch angles and the deflection angles of two orthogonal direction vectors of a sensitive load prism under different temperature load; the coordinates of prism unit vector in a sensitive load local coordinate system are expressed via mathematical expressions; the coordinates of prism unit vector in a satellite main body coordinate system are obtained via calculating; and at last the change situation of the sensitive load pointing direction is calculated based on thermal deformation eulerian angles. The method is mainly used for satisfying high precision pointing direction measuring requirements of arc second-grade angle change of satellite optical sensitive load caused by thermal deformation.

Description

technical field [0001] The invention relates to the deformation pointing measurement of satellite optical sensitive loads under different temperature loads. Measurement is carried out through the angle measurement system, as well as coordinate system conversion and thermal deformation Euler angle calculation, and finally the change of sensitive load direction is obtained through the mathematical model. Background technique [0002] Structural thermal deformation is one of the important factors affecting the resolution and positioning accuracy of optical remote sensing satellites for earth observation. Control and test verification during the process. In general, set a regular hexahedral prism or polyhedral prism on the payload structure, use the prism optical axis to characterize the pointing angle of the measured load, and then measure the pointing change of the prism optical axis and the angular relationship between them through the electronic theodolite to realize Groun...

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Application Information

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IPC IPC(8): G01C1/00
CPCG01C1/00
Inventor 赵旭枫庞亚飞赵海斌周宇周春华
Owner SHANGHAI SATELLITE ENG INST
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