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Calibration system for satellite clock and calibration method thereof

A technology for calibrating systems and satellites, applied to clocks, electronic timers, and changing time indications, etc., can solve problems such as no instructions or reports found, no data collected, etc., and achieve the effect of reliable satellite work accuracy

Active Publication Date: 2012-07-11
SHANGHAI SATELLITE ENG INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • Calibration system for satellite clock and calibration method thereof
  • Calibration system for satellite clock and calibration method thereof
  • Calibration system for satellite clock and calibration method thereof

Examples

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Embodiment Construction

[0027] The preferred embodiment of the calibration system of the satellite clock of the first solution of the present invention will be described below in conjunction with the accompanying drawings.

[0028] figure 1 It is a clock calibration system block diagram of the present invention; as figure 1 As shown in the example, the calibration system includes:

[0029] Satellite clock source 1: connected with measurement and control system 2 and load system 3, providing stable clock microsecond counting; the clock source is a constant temperature crystal oscillator, which provides n-bit (for example: 64-bit) continuous microsecond counting, and the clock is corrected before satellite launch The source is powered on and assigned an initial value of all zeros, and the n-bit is not corrected on the star; the current real-time 64-bit clock information on the star can be added to the data collected by the payload;

[0030] Satellite measurement and control system 2: receive remote c...

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PUM

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Abstract

The invention relates to the calibration of a satellite clock, and discloses a calibration system for a satellite clock and a calibration method of the system. The calibration system comprises a satellite clock source, a satellite measuring and controlling system, a satellite load system, a ground measuring and controlling station, a ground application station and a clock error fitting server. The calibration method comprises the following steps: 1) compiling a satellite program control operation sheet and loading to a satellite; 2) executing program control operation; 3) generating load data; 4) downloading load data; 5) analyzing the load data to calculate current UTC (Coordinated Universal Time); and 6) carrying out clock data fitting, and giving a corresponding relation between satellite time and the UTC. According to the calibration system for a satellite clock and the calibration method, the current problem that only satellite clock source precision is blindly improved to cause the complicated design of the satellite clock system and a control system, but the improvement effect of the practical working precision is not obvious can be solved. The working precision of the satellite is economically and reliably improved with a large-system closed loop feedback method.

Description

technical field [0001] The invention relates to a calibration system of a satellite clock, and also relates to a calibration method of the satellite clock calibration system. Background technique [0002] The clock on the artificial satellite has an alias called "positioning clock", that is, when the precise orbit of the satellite is known, according to the time tag of the satellite at a certain moment, the accuracy of the image or data collected by the satellite from the earth can be determined. Location. The flying speed of the earth's artificial satellite is about 8 kilometers per second. When the clock error is 1 millisecond, the positioning accuracy is 8 meters. It can be seen that to improve the positioning accuracy of remote sensing image data, it is necessary to improve the accuracy of the clock. [0003] At present, the methods used to improve clock accuracy on satellites are mainly through the use of expensive high-precision and high-stability clock sources, such...

Claims

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Application Information

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IPC IPC(8): G04G5/00G04R20/06
Inventor 朱海园李巍赵彦彭攀
Owner SHANGHAI SATELLITE ENG INST
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