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An unpacking method for satellite packet remote sensing data

A technology for telemetry data and packet data, applied in the field of data unpacking, can solve the problems of different packet identifiers and packet lengths, and unstable packet data, and achieve the effect of simple operation.

Inactive Publication Date: 2008-04-30
AEROSPACE DONGFANGHONG SATELLITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different components of satellite subsystems, the packet data downloaded by each satellite is also different, and their packet identifiers and packet lengths are also different. When using fixed-length data frames to transmit these packet data, each frame of data The package data contained in is not fixed, and the method of looking up the table by defining the storage location of the data frame is no longer suitable for processing these new package format data

Method used

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  • An unpacking method for satellite packet remote sensing data

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Embodiment Construction

[0017] In the embodiment of the present invention, the frame data format contained in the configuration file is as shown in Table 1:

[0018] Table 1 frame data format table

[0019] ## ## …… …… …… …… …… …… …… …… ## ##

frame

same

step

code

guard

star

Knowledge

do not

code

solid

Certainly

remote

Measurement

prepare

use

letter

interest

frame

count

number

host

lead

head

refer to

Needle

number

According to

area

fixed telemetry area

Packet telemetry area

[0020] The content of each component in the table is as follows:

[0021] 1) Frame synchronization code: take a fixed value to judge the validity of the recei...

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Abstract

A satellite telemetry data unpacking method which comprises the steps of: firstly defining a data format and storing the data format in a configuration document; receiving telemetry data from the front end and obtaining frame data from the telemetry data according to the frame data format defined in the configuration document; analyzing and reading package data from the frame data according to the package data format defined in the configuration document; and analyzing and reading the package data from the frame data and determining the validity of the package data according to package head information after receiving the complicate package data. If the package data are valid, the invention processes the data in the package and discards the received package data if the package data are invalid.

Description

technical field [0001] The invention relates to a method for unpacking data, in particular to a method for unpacking satellite subpackaged telemetry data. Background technique [0002] The satellite test equipment master control system is a control and management system used in the satellite test process. One of its important functions is to process and calculate the received data. Since the frame format data is widely used in the field of satellite communication at present, the data processing method adopted by the satellite test equipment master control system is mainly aimed at single frame format data. Frame format data means that the data to be sent is stored in fixed-length data frames. Each storage location in the data frame has its specific meaning, and the content it represents can be obtained by looking up the corresponding parameter table. Since the data format transmitted by this frame format data is fixed and not flexible enough, when the amount of transmitted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L29/06
Inventor 陈逢田潘清李培华张晓清杨玲肖川
Owner AEROSPACE DONGFANGHONG SATELLITE
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