S-band multi-channel high-precision space ranging transponder

Abstract

The invention discloses an S-band multi-channel high-precision space ranging transponder. The S-band multi-channel high-precision space ranging transponder comprises a power supply, a command module,a receiving channel, a digital baseband, a transmission channel, an interface module, and a self-calibration module, wherein the receiving channel is used for receiving an uplink radio-frequency signal and performing low noise amplification, down conversion, intermediate frequency filtering, intermediate frequency signal amplification, and AGC telemetry control; the digital baseband is used for sampling and outputting calculated PCM telemetry code, synchronous clock, and strobe pulse after acquisition and tracking of a spreading code, acquisition and tracking of a carrier wave, and remote control information bit synchronization are conducted on the uplink telemetry channel; the PCM telemetry code is subjected to spectrum spreading and BPSK modulation in a downlink telemetry channel, and amodulated downlink spread spectrum signal is outputted; a range zero value of a transponder is calculated; the transmission channel is used for performing uplink frequency conversion, radio frequencyfiltering, and power amplification, and then a radio frequency signal is obtained and transmitted; the interface module is used for interacting with an on-board computer for satellite telemetry data,transponder telemetry data, and satellite remote control data; and the self-calibration module calculates the range zero value of the self-calibration module according to the digital baseband for self-calibration. The S-band multi-channel high-precision space ranging transponder has the advantages that the function is complete, ranging precision is high, and the structure is simple.

Description

technical field [0001] The invention belongs to the technical field of aerospace measurement and control and electronic equipment, and relates to an S-band multi-channel high-precision aerospace ranging transponder. Background technique [0002] Factors affecting the orbit determination accuracy of high-precision spacecraft include measurement geometry, measurement element accuracy, atmospheric correction accuracy, station site measurement accuracy, data processing methods, and many other aspects. As the key subsystem of the satellite platform, the S-band measurement and control transponder is responsible for the modulation and transmission of satellite telemetry data, the reception and demodulation of remote control data, and the completion of satellite-ground distance and speed measurement. The ranging accuracy of the S-band measurement and control transponder is a part of the system ranging and directly affects the ranging accuracy of the system. [0003] With the deepen...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the invention is that the ranging accuracy of the existing spaceborne S-band measurement and control transponder is at the decimeter level, and it is difficult to meet the application requirements of high-precision orbit determination

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