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Telemetry data compression storage and rapid query method of ontrack spacecraft

A technology for compressing and storing telemetry data, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as high complexity of compression algorithms, inability to meet the real-time requirements of satellite telemetry data, and reduce data retrieval efficiency. Achieve the effects of improving real-time performance, improving storage efficiency, and improving accuracy

Active Publication Date: 2012-05-02
BEIJING INST OF SPACECRAFT SYST ENG
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AI Technical Summary

Problems solved by technology

However, if the above method is used to compress and store the telemetry data of in-orbit spacecraft, the efficiency of data retrieval will be reduced, and some compression algorithms are too complex to meet the real-time requirements of receiving and storing satellite telemetry data.

Method used

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  • Telemetry data compression storage and rapid query method of ontrack spacecraft
  • Telemetry data compression storage and rapid query method of ontrack spacecraft
  • Telemetry data compression storage and rapid query method of ontrack spacecraft

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Embodiment Construction

[0036] The telemetry data processing method of the on-orbit spacecraft of the present invention includes a telemetry data compression storage method and a telemetry data query method.

[0037] Each satellite has a large telemetry table that describes the telemetry parameter information (including the name, code, unit, etc.) of the telemetry parameters. First, a telemetry parameter table is generated for each telemetry parameter based on this telemetry table to store the telemetry. Data information of the parameter (including time and value information).

[0038] 1. Compressed storage method

[0039] For the received real-time telemetry data, it is compressed and stored according to the change rule of telemetry parameters. The compression principle is: establish a database table for each telemetry parameter, and store the telemetry data value only when the data changes, if it is different from the previous frame Compared with the stored telemetry data value, there is no change and no...

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Abstract

The invention discloses a telemetry data compression storage and rapid query method of an ontrack spacecraft, comprising the steps of: firstly, generating a telemetry parameter list for each telemetry parameter during storage; then circularly receiving a real-time telemetry parameter data packet, unpacking and reducing data frame information on a satellite, obtaining a telemetry parameter data list included by a data frame from the data frame; comparing each telemetry parameter data in the telemetry data list with newest telemetry data in the corresponding telemetry parameter table, if the telemetry parameter data is different from the newest telemetry data, storing time and a data value of the point in the telemetry parameter list, otherwise, not storing the data of the point; during query, obtaining a satellite name, a telemetry parameter code and time slot information according to the query condition submitted by a user, then searching all telemetry data in a required time slot from a database list, and extracting characteristics values of the telemetry data according to the size of screen resolution; and finally, drawing a telemetry data curve on a screen according to the dataof the characteristic values. By adopting the method, the storage efficiency of the telemetry data and the query real-time property can be improved.

Description

Technical field [0001] The invention relates to a method for processing telemetry data of an orbiting spacecraft. Background technique [0002] Satellite telemetry data is an important basis for engineering and technical personnel and ground monitoring systems to monitor the working status of satellites and analyze and process faults on the satellites. Satellite in-orbit data has a wide variety of data, a large amount of data, and high requirements for monitoring and processing effectiveness. Therefore, efficient storage and fast query of massive telemetry data is an urgent problem to be solved. Currently, data storage and query methods widely used on spacecraft mainly include the following: [0003] 1. Direct storage method [0004] That is, the telemetry data of orbiting satellites is recorded by frame-by-frame storage, and data query is performed through database software. As the number of satellites is increasing, and the types of satellite telemetry parameters are also increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 秦巍闫谦时周永辉朱剑冰颜灵伟刘鹏徐江涛
Owner BEIJING INST OF SPACECRAFT SYST ENG
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