Method for calibrating radio wave refraction correction effects by virtue of precision trajectory
A technology of radio wave refraction and calibration method, which is applied in the direction of satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problem that the evaluation accuracy is limited by the observation time period and geographical location, and the laser ranging data is greatly affected. It cannot reflect the direction of radio wave propagation and other issues, and achieves the effect of concise and clear evaluation process, avoiding the influence of oscillation, and strong objectivity
Active Publication Date: 2016-10-26
CHINA XIAN SATELLITE CONTROL CENT
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In the practical application of spacecraft atmospheric refraction inspection and evaluation, these methods need to add corresponding standard observation equipment for evaluation at each station, and the detection time is limited, so evaluation cannot be continuously provided. The evaluation accuracy is affected by the observation period and geographical location. limit
Obtaining the atmospheric refraction profile is limited by the assumption error of the model formula, the conversion error of the refractive index formula, the error of the atmospheric st
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0025] The invention utilizes laser distance measurement or space-borne GPS distance measurement or altimeter data to obtain the precise ballistic trajectory of the satellite, and coordinates of the geometric center calibration of the measurement and control equipment obtained by geodesy. Through precise ephemeris and measurement and control equipment coordinate transformation, and space geometry vector calculation, the standard value of each measurement element in the external measurement is obtained, and the main error and residual error caused by atmospheric refraction are solved based on the observation value of the external measurement data and the standard value of each measurement element , designed a test model to quantitatively evaluate the correction effect of atmo...
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The invention provides a method for calibrating radio wave refraction correction effects by virtue of a precision trajectory. A precision trajectory of a satellite is obtained by virtue of laser ranging or satellite-born GPS ranging or altimeter data, a calibrated coordinate of a geometric center of measurement and control equipment is acquired by geodetic measurement, a standard value of each measurement element for exterior measurement is obtained by precise ephemeris and measurement and control equipment coordinate conversion as well as spatial geometric vector calculation, a main error and post-fit residual caused by atmospheric refraction are solved according to an observed value of exterior measurement data and the standard value of each measurement element, a testing model for quantitatively evaluating atmospheric refraction correction effects is designed, and the refraction correction accuracy is calculated. According to the method, time and space limits are broken, and the refraction correction effects of each measurement element for exterior measurement can be tested and evaluated in real time.
Description
technical field [0001] The invention relates to the field of on-orbit spacecraft measurement and control management, and is suitable for the inspection and evaluation of the atmospheric refraction correction effect of spacecraft external measurement data. Background technique [0002] Atmospheric refraction brings errors to the measurement data of the aerospace external measurement system and satellite navigation system. To improve the positioning and measurement accuracy of the spacecraft, it is necessary to correct the measured apparent distance, angle and speed of the radio wave refraction to compensate for the space environment. measurement error. Compensating the measurement error caused by atmospheric refraction is one of the tasks in the data processing of spacecraft external ballistic measurement. Atmospheric refraction correction methods currently used can be classified as corrections with models or measured atmospheric refractivity profiles and propagation correct...
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Login to view more IPC IPC(8): G01C25/00G01S19/40
CPCG01C25/00G01S19/40
Inventor 赵军王西京陈建荣洪涛张莹陈学军赵鞭张华张冲难浦仕保
Owner CHINA XIAN SATELLITE CONTROL CENT
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