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Method for correcting influences of atmosphere inclination on ground star observation values

An atmosphere and observation value technology, applied in the direction of measuring devices, special data processing applications, instruments, etc., can solve problems such as atmospheric refraction correction residuals, inability to fully describe the true state of the atmosphere, and inaccurate atmospheric refraction correction, etc., to improve measurement The effect of precision

Active Publication Date: 2013-01-16
YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the problem that the existing concentric spherical stratified atmosphere cannot fully describe the real state of the atmosphere, which makes the correction of atmospheric refraction inaccurate, that is, there is a residual error in the correction of atmospheric refraction, the present invention provides a method for correcting stellar observation values. The method of atmosphere tilting, its technical scheme is as follows:

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  • Method for correcting influences of atmosphere inclination on ground star observation values
  • Method for correcting influences of atmosphere inclination on ground star observation values
  • Method for correcting influences of atmosphere inclination on ground star observation values

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[0036] The true zenith distance Z of the measured star in the meridian direction is defined as: instantaneous latitude Subtract the apparent declination δ of the measured star, namely: In this way, the sign of the zenith distance is given: the south of the zenith is positive, and the north of the zenith is negative. The difference between the observed apparent zenith distance z and the true zenith distance Z is the instantaneous astronomical atmospheric refraction value R, and there is: Z=z+R.

[0037] Let’s clarify a few concepts first: the true zenith distance Z is calculated, and the apparent zenith distance z is a measured value obtained by observation. The position calculated by the star catalog (respectively referring to right ascension and declination), that is, the apparent position, is calculated from the flat position of the star catalog epoch (such as B2000.0), plus precession, nutation and proper motion, aberration, annual parallax, etc. Corrected.

[0038] Th...

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Abstract

The invention belongs to the technical field of astrometry and relates to a method for correcting influences of atmosphere inclination on ground star observation values. The method is used for correcting influences of the atmosphere inclination on astronomical longitude and latitude measured values obtained during ground star observation and solves the problem of inaccuracy of existing atmospheric refraction error correction. The method includes the steps: firstly, selecting a plurality of stars as sample stars, establishing a regression model among the observation values of the sample stars, and resolving influence quantity of atmosphere isodensity layer inclination caused by factors such as climate change in observation of each star group; and secondly, correcting the observation values of the stars according to the resolved quantity of the atmosphere isodensity layer inclination. By the method, an apparent zenith distance measured value of each star obtained by observation and star passing record moments can be accurately corrected for atmosphere isodensity layer inclination, and measurement accuracy of astrometric and geodetic instruments is improved.

Description

technical field [0001] The invention belongs to the technical field of astrometry, and in particular relates to a method for correcting measurements of stars by atmospheric isodensity layers. Background technique [0002] When light travels through an atmosphere that is denser at the top and denser at the bottom, the path will be inflected. In the field of astrometry, atmospheric refraction specifically refers to the refraction phenomenon caused by the radiation emitted by celestial bodies passing through the earth's atmosphere, and the change of the observation direction of celestial bodies caused by the above phenomena. The amount of change is called the effect of atmospheric refraction, also referred to as atmospheric refraction. It has an impact on radar positioning, Doppler speed measurement, communication, and navigation. The accuracy of the target angle, distance, height and other results measured in these works are all affected by atmospheric refraction. The effec...

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Application Information

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IPC IPC(8): G01C25/00G06F19/00
Inventor 苏婕陈林飞杨磊程向明王建成李彬华冒蔚铁琼仙
Owner YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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