Method for establishing real-time troposphere grid product

A troposphere and zenith troposphere technology, applied in the field of satellite positioning, can solve problems such as slow convergence speed, and achieve fast convergence speed, high precision, and fast speed

Pending Publication Date: 2021-06-22
重庆两江卫星移动通信有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose is to provide a method for establishing real-time tropospheric grid products, solve the problem of slow convergence speed of GNSS PPP positioning technology, and improve the timeliness and accuracy of tropospheric grid products

Method used

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  • Method for establishing real-time troposphere grid product
  • Method for establishing real-time troposphere grid product
  • Method for establishing real-time troposphere grid product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] figure 1 It is a flowchart of a method for establishing a real-time tropospheric grid product in this embodiment. As shown, the method includes:

[0032] Step 1: Obtain the location information of the grid points, and establish a local coordinate system centered on the grid points.

[0033] The position information of the obtained grid points is represented by spatial rectangular coordinates (X, Y, Z), and the corresponding local coordinate system established changes with the position transformation of the grid points, which increases the flexibility of the method.

[0034] Step 2: Search for each reference station within the specified range under the local coordinate system, and determine the coordinates of each reference station under the local coordinate system.

[0035] The specified range refers to the distance range radiating from the grid point as the center under the local coordinate system. Then the geodetic coordinates of each reference station in the local...

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Abstract

The invention discloses a method for establishing a real-time troposphere grid product. The method mainly utilizes LEO / GNSS satellite observation data to carry out joint rapid PPP calculation, and zenith troposphere delay at each ground reference station position is obtained. The zenith troposphere delay at each specified grid point is obtained by using the zenith troposphere delay at each ground reference station, and the calculation of a grid product is completed. The method has the advantages that after a low-orbit satellite is added, more effective observation data can be obtained within corresponding time, inclined path troposphere delay of more satellites can be obtained, and troposphere delay obtaining efficiency can be improved; meanwhile, the GNSS / LEO combined rapid PPP is short in convergence time and higher in positioning precision, namely, the correspondingly obtained troposphere delay precision is also higher. Therefore, the precision and the timeliness of a troposphere grid product can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a method for establishing a real-time tropospheric grid product. Background technique [0002] The troposphere refers to the atmosphere from the ground to the range of 50km. The earth's troposphere is the layer of atmosphere closest to the earth's surface, which concentrates about 75% of the mass of the atmosphere and more than 90% of the mass of water vapor. When the electromagnetic wave signal passes through the troposphere, the propagation path will be bent and the distance will be deviated. This phenomenon is called tropospheric refraction. [0003] The influence of the troposphere on the refraction of electromagnetic waves has nothing to do with its propagation speed and frequency, but is closely related to the refractive index of the atmosphere and the propagation direction of electromagnetic waves, and the influence on the GNSS pseudo-range and carrier phase...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S19/29G01S19/30G01S19/39G01S19/40G01S19/44G01S19/07G01S19/33
CPCG01S19/29G01S19/30G01S19/396G01S19/393G01S19/40G01S19/44G01S19/072G01S19/33Y02A90/10
Inventor谭理庆曹阳彭琦唐帅刘俊杨鑫
Owner重庆两江卫星移动通信有限公司