Telemetry ground station pointing calibration method

A ground station, pointing angle technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of not being a point radiation source, affecting the accuracy of antenna calibration, and limiting practical applications, etc., to achieve a simple calibration process, reduce manpower and material resources, and improve standards. The effect of calibration accuracy

Active Publication Date: 2019-04-16
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

However, the traditional solar radiation source calibration has certain inherent defects, mainly because the sun has a certain angular diameter relative to the ground antenna, which is not an ideal point radiation source, making it difficu

Method used

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  • Telemetry ground station pointing calibration method
  • Telemetry ground station pointing calibration method
  • Telemetry ground station pointing calibration method

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Embodiment Construction

[0045] Such as figure 1 As shown, a telemetry ground station pointing calibration method includes the following steps:

[0046] (1) Using the maximum value tracking strategy, drive the antenna azimuth and pitch axis, and gradually approach the direction where the maximum solar radiation power appears. When the antenna tracking is stable, record the current antenna azimuth and pitch pointing angle;

[0047] (2) Obtain the azimuth and elevation angles of the center of the sun in the "east-north-sky" coordinate system relative to the ground station at the time of recording the pointing angle, and at the same time correct the antenna pointing angle to this value during stable tracking. This process is recorded as antenna pointing from measurement Coordinate transformation from the coordinate system to the northeast sky coordinate system;

[0048] (3) Obtain the pointing angle (A c ,E c ), calculate the direction vector r 0 , set the cone scanning cone angle γ, and calculate th...

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Abstract

The invention provides a telemetry ground station pointing calibration method. The method comprises the following steps that firstly, maximum tracking is carried out by utilizing solar radiation powerreceived by an antenna, then an antenna pointing angle is converted from a measurement coordinate system to an east-north-up coordinate system by utilizing the angle of the sun under the east-north-up coordinate system, a vector is scanned by utilizing the direction vector of the sun relative to a measurement and control station at the calibration moment, then an antenna is controlled to carry out cone scanning, iterative calculation is carried out through a solar radiation power variation coefficient so as to obtain a pointing deviation correction value of the corresponding scanning period,moreover, iteration correction is carried out on the antenna pointing direction, and finally, the above processes are repeated at different moments to obtain a plurality of groups of calculation values; and an equation set is constructed by utilizing an antenna pointing error correction model, a plurality of parameters in the error correction model are obtained through a minimization parameter fitting method, and an angle deviation value calculated through the error correction model is the pointing deviation of the antenna each time when the antenna is pointed in the follow-up process.

Description

technical field [0001] The invention relates to a pointing calibration method of a telemetry ground station, which is suitable for fast and high-precision calibration of antenna pointing errors of small telemetry ground stations. Background technique [0002] In recent years, the development of telemetry ground stations has entered the stage of commercialization, and the miniaturized and mobile commercial ground stations have begun to attract more and more attention from researchers. During the construction and use of the ground station, various system errors need to be calibrated and corrected to maintain the telemetry performance of the system. The antenna pointing calibration of the telemetry ground station is an important part of the ground station calibration. The traditional antenna pointing calibration usually uses the calibration tower method and the radio star method, but these two methods are not suitable for small and mobile commercial ground Both sites have inhe...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 贾建辉戴可人赵书阳马纪军汪洋张雪崔慧敏
Owner BEIJING RES INST OF TELEMETRY
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