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Inter-satellite ranging method based on dual-satellite time synchronization

A technology for time synchronization and inter-satellite ranging, which is applied to measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation. Improve the effect of ranging accuracy and clock accuracy improvement

Active Publication Date: 2014-03-26
NO 513 INST THE FIFTH INST OF CHINA AEROSPACE SCI & TECH
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Problems solved by technology

[0007] It can be seen from the above description that the inter-satellite distance measurement using the inter-satellite two-way time comparison technology has low accuracy and cannot meet the existing ranging requirements.
The ranging technology based on the principle of GPS relative positioning is heavily dependent on the GPS navigation system, which is extremely risky in the system

Method used

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  • Inter-satellite ranging method based on dual-satellite time synchronization
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  • Inter-satellite ranging method based on dual-satellite time synchronization

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0032] The present invention is based on the inter-satellite ranging method of double-satellite time synchronization, which first completes the time synchronization between the two stars, and then completes the inter-satellite high-precision ranging function through the inter-satellite transmission of time codes, and does not affect the inter-satellite remote control and telemetry data while measuring the distance transmission.

[0033] In this method, to ensure the accuracy of time difference ranging, the time synchronization between the two stars is the most critical element. There are two types of time synchronization: frequency synchronization and clock synchronization. Frequency synchronization refers to maintaining the same frequency of each clock, but does not consider the instantaneous phase of each clock. Clock synchronization means that the clo...

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Abstract

The invention discloses an inter-satellite ranging method based on dual-satellite time synchronization. On the basis of not depending on GPS, ranging accuracy can be raised, and present ranging requirements can be met. Firstly, a main satellite and a following satellite make an appointment for time setting. At the moment of time setting, time synchronization of dual-satellite is carried out. After time synchronization, dual-satellite clock frequency synchronization is carried out. After the two steps of synchronization are finished, the dual satellites operate under the clock after the synchronization, and the distance between the dual satellites is determined through inter-satellite timing code transmission.

Description

technical field [0001] The invention belongs to the field of inter-satellite measurement, control and measurement, in particular to an inter-satellite distance measurement method based on double-satellite time synchronization, which can be widely used in measurement, control and measurement between double-satellites such as lunar exploration, Mars exploration, inter-satellite networking, and space station exit. distance and other tasks. Background technique [0002] In order to achieve precise measurement, accurate tracking, full airspace coverage, real-time control of space targets, and improve the survivability of the measurement and control system, satellite constellation and satellite formation flight technology must adopt methods and means. In order to meet the reliability of overseas satellite monitoring and emergency response, it is required to use the inter-satellite link to transmit data such as telemetry data, remote control commands, and command responses, as well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/08
CPCG01S13/74
Inventor 申景诗康旭辉李向阳王宁赵雪纲
Owner NO 513 INST THE FIFTH INST OF CHINA AEROSPACE SCI & TECH
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