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A Time Synchronization Method for Multi-Sensor Data and Orbit Information

A technology of time synchronization and orbit information, which is applied in the direction of instruments, surveying and mapping, navigation, navigation, etc., can solve the problems of attitude determination error and affect the accuracy of attitude determination, and achieve the effect of improving accuracy

Active Publication Date: 2020-04-24
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

The asynchrony between the orbital data and the attitude data here will cause errors in attitude determination, which in turn affects the accuracy of attitude determination.

Method used

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  • A Time Synchronization Method for Multi-Sensor Data and Orbit Information
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  • A Time Synchronization Method for Multi-Sensor Data and Orbit Information

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Embodiment Construction

[0035] by reading reference figure 1 The features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting examples. See the illustration of an embodiment of the invention figure 1 , the present invention will be described in more detail below. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[0036] Such as figure 1 As shown, the multi-sensor data provided by the present invention and the track information time synchronization method comprise the following steps:

[0037] S1. The sensitive moment of obtaining the combined data of the gyroscope;

[0038] S2. Determine the orbit calculation time;

[0039] S3, collecting attitude data and exposure time data of the star sensor;

[0040] S4, calculate the exposure moment of the star sensor according to the computer data and the exposure time data of the star sensor;

[0...

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Abstract

The invention relates to a multi-sensor data and track information time synchronization method. The method comprises the following steps: S1) obtaining a sensitive time of gyro combined data; S2) determining a track calculating time; S3) collecting attitude data and exposure time data of a star sensor; S4) according to computer data and the exposure time data of the star sensor, calculating the exposure time of the star sensor; S5) according to the exposure time of the star sensor and the track calculating time, performing calculation to obtain deviation quaternion caused by time difference; and S6) performing calculation to obtain attitude quaternion of the star sensor after synchronization with the track calculating time. The multi-sensor data and track information time synchronization method can effectively guarantee time synchronization of various sensitive data and track data required by satellite attitude determination, so that the authentic satellite attitude having high precision is obtained.

Description

technical field [0001] The invention relates to a synchronization method, specifically a method for time synchronization between satellite onboard multi-sensor data and orbit information, and belongs to the technical field of satellite attitude determination. Background technique [0002] In recent years, aerospace science and technology has achieved tremendous development, and its application fields have been continuously expanded accordingly, and the accuracy requirements for earth observation are also getting higher and higher. High-resolution earth observation requires that the on-board payload can precisely control the pointing, or obtain the pointing information of the payload's optical axis through the satellite attitude determination system. In the satellite attitude determination system, the attitude determination system composed of star sensors and gyroscopes has high accuracy and is the first choice for many space missions. [0003] The star sensor is currently t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01C21/02
CPCG01C21/025G01C25/00
Inventor 谢任远沈怡颹余维吴敬玉陆智俊
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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