Method for eliminating delay errors of troposphere of GNSS atmospheric probing data

A tropospheric delay and atmospheric sounding technology, applied in measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve problems such as reduced model accuracy, small application range, and uneven model accuracy.

Inactive Publication Date: 2013-09-25
SOUTHEAST UNIV
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Problems solved by technology

[0004] The Hopfield and Saastamoinen models require meteorological parameters at the location of the station, but the general station does not have the conditions for the measured meteorological parameters. If the standard meteorological parameters are used instead, the accuracy of the model will be reduced; the scope of application of the EGNOS and UNB

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  • Method for eliminating delay errors of troposphere of GNSS atmospheric probing data
  • Method for eliminating delay errors of troposphere of GNSS atmospheric probing data

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Embodiment Construction

[0047] The present invention will be further explained below in conjunction with the accompanying drawings.

[0048] The present invention proposes a new method for determining global tropospheric delay, comprising the following steps:

[0049] (1) Calculate the temperature and air pressure of the station using the GPT model:

[0050]The input parameters of the GPT model are: station longitude, station latitude, geodetic height, and annual cumulative days. The output values ​​of the GPT model are: temperature, air pressure, and elevation anomalies. The elevation anomaly is the difference between the geodetic height and the normal height;

[0051] Firstly, the annual mean value a of the temperature and air pressure at the location of the station is obtained by using the 9th order 9th spherical harmonic function 0 , annual variation range A and elevation anomaly N:

[0052]

[0053] Where: P nm Represents the Legendre polynomial; A nm and B nm Indicates the coefficient o...

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Abstract

The invention discloses a method for eliminating delay errors of the troposphere of GNSS atmospheric probing data. The method for eliminating the delay errors of the troposphere of the GNSS atmospheric probing data is characterized in that a GPT model, a UNB3m model and a classic troposphere model are merged together, the classic troposphere model is a Hopfield or Saastamoinen model. The method for eliminating the delay errors of the troposphere of the GNSS atmospheric probing data includes the following steps that the temperature and the air pressure of a probing station are calculated out by means of the GPT model, the hydrosphere pressure of the probing station is calculated out by means of the UNB3m model and finally, a global mapping function is used for calculating out delay correction of the troposphere in the gazing direction of a satellite receiver. The method for eliminating the delay errors of the troposphere of the GNSS atmospheric probing data is capable for accurately calculating out a priori value of troposphere delay with insufficient actually measured meteorological data and can be applied to the fields such as GNSS positioning and GNSS meteorology.

Description

technical field [0001] The invention belongs to the GNSS atmospheric detection technology. The GNSS technology provides a powerful tool for atmospheric detection, which has the characteristics of no calibration, all-weather, high precision, high vertical resolution, and uniform global coverage; it is particularly related to accurately determining the GNSS atmospheric detection. Elimination method of tropospheric delay error. Background technique [0002] Use GNSS technology to obtain relevant parameters such as the temperature, pressure and humidity of the earth's atmosphere. In GNSS observations, the delay caused by electromagnetic signals passing through the atmosphere is one of the main sources of error, referred to as atmospheric error. Various GNSS errors include satellite clock error, receiver clock error, atmospheric delay and other errors; GNSS atmospheric error mainly includes tropospheric delay and ionospheric delay. Among them, the ionospheric delay is related t...

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Application Information

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IPC IPC(8): G01W1/08G01S19/07
Inventor 潘树国陈伟荣聂文锋
Owner SOUTHEAST UNIV
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