Satellite telemetering data transmission method

Abstract

The invention provides a method for transmitting satellite telemetry data. Devices adopted in the method are a house keeping central computer, a house keeping data storage module and a data downward transmission module; the steps of the method include: (1) the house keeping central computer collects telemetry data from all lower-level computers of the satellite to send the house keeping data storage module; (2) the house keeping data storage module receives, format and store the telemetry data; (3) based on the ground command control, the house keeping data storage module transmits the telemetry data to the data downward transmission module; (4) the data downward transmission module transmits the telemetry data downward. The method overcomes the conventional defects of low signal channel speed and limited storage capacity, improves the transmission speed and the wholeness of the satellite telemetry data, improves the downward telemetry data quantity of the satellite and can store and transmit the telemetry data of the satellite in full track and full time period and the important data of the whole satellite.

Description

Technical field [0001] The invention relates to a satellite telemetry data transmission method, which is suitable for the downlink transmission of satellite full orbit, full time telemetry data and important data of the entire satellite. Background technique [0002] At present, the commonly used satellite telemetry data downloading method is mainly used by the satellite service center computer to collect the telemetry parameters of each sub-system through the on-board bus, and then package them to form a common telemetry data format (subcontracted telemetry or fixed telemetry), and modulate After being the DPSK signal, it is serially downloaded via the on-board S-band transponder. Telemetry data is the only way to understand the working status and health status of the satellite on the ground. Usually telemetry data is divided into real-time telemetry and delayed telemetry. Real-time telemetry refers to the entire satellite data collected and downloaded by the satellite service h...

AI Technical Summary

Problems solved by technology

[0003] Due to the constraints of our country's geographical location and measurement and control system, for sun-synchronous orbit satellites, only 6-7 orbits cross the border of our country every day, and the border time is only about 10 minutes each time, and the downlink telemetry code rate of the satellite measurement and control S-band transponder is only It is 4096bps. Therefore, due to the constraints of transit time and downlink code rate, the satellite telemetry data, especially the satellite telemetry data outside the country, cannot be completely downloaded. Only the delayed telemetry data can be extracted and compressed in a certain proportion before downloading. In addition, due to the limitation of the memory capacity of the computer in the Star Operations Center, it is impossible to save a large amount of delayed telemetry data, so that a large amount of telemetry information related to satellite in-orbit cannot be obtained on the ground, which affects the monitoring of the satellite status on the ground; After the failure of the computer in the service center, all overseas telemetry data before the failure were lost, which affected the data basis for fault judgment; thirdly, for the downloading of some important data on the satellite proposed by the new model, especially when the data volume is large and the collection High-frequency data cannot be transmitted due to the limitation of downlink channel capacity, which affects the function improvement of new models and the use of users

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