High-energy particle interference suppression method of star sensor

A star sensor, interference suppression technology, applied in the direction of instruments, image data processing, astronomical navigation, etc., can solve problems such as no public literature records, and achieve the effect of easy realization

Active Publication Date: 2013-10-02
BEIJING INST OF CONTROL ENG
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  • Description
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Problems solved by technology

[0016] Judging from the information obtained, although some domestic units have done some radiation experiments on the imaging devices of the sensors, and have a certain understanding of the phen

Method used

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  • High-energy particle interference suppression method of star sensor
  • High-energy particle interference suppression method of star sensor
  • High-energy particle interference suppression method of star sensor

Examples

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[0099] Example 1

[0100] (1) First take a star map such as figure 2 As shown in (A), the star map is divided into a number of 71×71 small windows.

[0101] (2) Carry out star point extraction in each window.

[0102] (3) According to the star point judgment rule, there is only one column of candidate star point 2, which is regarded as a pseudo star point and is eliminated.

[0103] (4) Candidate star points 4 and 5 are located in the same window, and only the one with the highest brightness is kept, star point 5 is eliminated, and candidate star points 1, 3, 4, 6, 7, 8, 9 are obtained, such as figure 2 (B) Shown.

[0104] (5) For the next star map such as figure 2 As shown in (C), the above steps are taken to obtain candidate star points 1, 3, 4, 5, 6, 7, 8, 9, such as figure 2 (D) Shown.

[0105] (6) Put figure 2 (D) The star points extracted in figure 2 The star points extracted in (B) are compared and verified. Since star points 3 and 7 are farther than the threshold, the...

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Abstract

A high-energy particle interference suppression method of a star sensor is divided into an all-celestial acquiring mode and a window tracking mode according to working modes of the star sensor. The high-energy particle interference suppression method in the all-celestial acquiring mode and the high-energy particle interference suppression method in the window tracking mode comprise the steps of primary star point selection and primarily selected star point verification. The method effectively suppresses charged particle interference, and the tracking performance and the identification success rate of the star sensor are improved and increased in various space radiation environments.

Description

technical field [0001] The invention relates to a method for suppressing high-energy particle interference of a star sensor. Background technique [0002] The space radiation environment is one of the main factors that induce spacecraft failures and abnormalities. With the continuous growth of spacecraft life and the wide application of integrated electronic components, the possibility of space radiation-induced failures is also increasing. For spacecraft with high safety and high reliability requirements, it is very important to study the influence of space radiation environment on aerospace engineering so as to formulate corresponding protective countermeasures. [0003] A large amount of data at home and abroad show that after the star sensor works in space for a period of time and is irradiated, it will produce such phenomena as the signal-to-noise ratio becomes smaller, the thermal pixels increase, and the dark current inhomogeneity expands, etc.; The determined satell...

Claims

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Application Information

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IPC IPC(8): G06T5/00G01C21/02
Inventor 鹿瑞武延鹏袁军周建涛周剑敏王艳宝高文文
Owner BEIJING INST OF CONTROL ENG
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