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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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  • Application Information

AI Technical Summary

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 phenomenon of false star points caused by space radiation, systematic analysis of space radiation is sensitive to stars. The impact of the device has not yet been documented in the public literature

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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Embodiment 1

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

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

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

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

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

[0105] (6) Will figure 2 (D) Star points extracted with figure 2 (B) The star points extracted in (B) are compared and verified. Since the distance between star points 3 and 7 exceeds the threshold, they are eliminated; at 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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