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Coarse orbit spacecraft and Beidou No.3 satellite inter-satellite link signal bidirectional capture method

An inter-satellite link and Beidou satellite technology, which is applied in the field of two-way signal acquisition of the inter-satellite link between a coarse-orbit spacecraft and Beidou-3 satellite, can solve the problems of inability to measure the precise orbit of the spacecraft and the clock difference, and improve the signal. The effect of capturing time uncertainty metrics

Pending Publication Date: 2021-01-12
INNOVATION ACAD FOR MICROSATELLITES OF CAS +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for two-way acquisition of the inter-satellite link signal between a rough-orbit spacecraft and the Beidou No. 3 satellite, to solve the problem that the ground master control station cannot Problems in Precise Orbit Determination and Clock Error Determination of Spacecraft

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  • Coarse orbit spacecraft and Beidou No.3 satellite inter-satellite link signal bidirectional capture method
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  • Coarse orbit spacecraft and Beidou No.3 satellite inter-satellite link signal bidirectional capture method

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[0044] The method for two-way acquisition of inter-satellite link signals between a rough-orbit spacecraft and a Beidou-3 satellite proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0045] In addition, unless otherwise stated, features in different embodiments of the present invention can be combined with each other. For example, a feature in the second embodiment may be used to replace a corresponding or functionally identical or similar feature in the first embodiment, and the resulting embodiment also falls within the scope of disclosure or description of t...

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Abstract

The invention provides a coarse orbit spacecraft and Beidou No.3 satellite inter-satellite link signal bidirectional capture method, which comprises the following steps that: an inter-satellite link module of a coarse orbit spacecraft is switched to a signal large-range capture working mode, and the coarse orbit spacecraft captures an inter-satellite link signal of a Beidou satellite in one direction; the coarse orbit spacecraft obtains a one-way precise distance measurement value of the Beidou satellite, and an orbit determination algorithm and time synchronization algorithm module of the coarse orbit spacecraft processes the one-way precise distance measurement value to obtain a precise orbit of the coarse orbit spacecraft and a precise clock error of the coarse orbit spacecraft; the inter-satellite link module of the coarse orbit spacecraft is switched to a signal compensation transceiving working mode, and when the inter-satellite link module of the coarse orbit spacecraft performssignal transceiving, the arrival time of signals is calculated in real time according to the precise orbit of the coarse orbit spacecraft and a pre-injected coarse orbit error, and parameter compensation is performed on receiving, capturing, modulating and sending of inter-satellite link signals, and bidirectional capture of inter-satellite link signals between the coarse orbit spacecraft and theBeidou satellite is automatically completed.

Description

technical field [0001] The invention relates to the technical field of satellite communication and signal processing, in particular to a method for bidirectionally capturing inter-satellite link signals between a rough-orbit spacecraft and a Beidou No. 3 satellite. Background technique [0002] In July 2020, China has built the Beidou-3 global navigation and positioning system. Among them, the inter-satellite link system based on the time-division space-division multiplexing system is a major feature of the Beidou global system. The system is configured through each Beidou-3 satellite. The microwave inter-satellite link terminal realizes the two-way ranging and communication functions with other satellites; and realizes the communication ranging between the same satellite and multiple satellites through the time division switching of signal sending and receiving, and the signal pointing to space division multiplexing ; Through the routing method of node storage and forwardin...

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Application Information

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IPC IPC(8): G01S19/26G01S19/12G01S19/37
CPCG01S19/26G01S19/12G01S19/37
Inventor 赵帅龚文斌林宝军赵亚慧
Owner INNOVATION ACAD FOR MICROSATELLITES OF CAS
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