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Telemetry data compression storage and rapid query method of ontrack spacecraft

A technology of remote measurement data and query method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effects of improving real-time performance, improving storage efficiency, and improving accuracy

Active Publication Date: 2013-05-01
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

[0038] 1. Compressed storage method

[0039] For the received real-time telemetry data, it is compressed and stored according to the changing rules of the telemetry parameters. The compression principle is: create 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 Stored telemetry values ​​are no longer stored if they have not changed since then. The satellite telemetry data is relatively stable, and most of the data does not change much. The above method can meet the compression requirements put forward by users.

[0040] like figure 1 As shown, the specific steps for recording parameters in compressed mode are as follows:

[0041] 1) Establish a data frame information table, and generate a telemetry parameter table for the telemetry parameters at the same time (a telemetry parameter table is corresponding to each telemetry parameter); the formats of the data frame informa...

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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 processing method for telemetry data of an in-orbit 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 deal with faults on satellites. Satellite in-orbit data has a variety of types, a large amount of data, and high requirements for monitoring and processing effectiveness. Therefore, efficient storage and fast query of massive telemetry data are urgent problems to be solved. At present, the data storage and query methods widely used on spacecraft mainly include the following: [0003] 1. Direct storage method [0004] That is, the in-orbit satellite telemetry data is recorded by frame-by-frame storage, and data query is performed through database software. Due to the increasing number of satellites and the increasing types of satellite telemetry parameters,...

Claims

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Application Information

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Patent Type & Authority Patents(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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