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Single-frequency PPP ionosphere weighting method based on region CORS

An ionosphere and ionosphere delay technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the problem of large impact on positioning results

Inactive Publication Date: 2014-04-30
SOUTHEAST UNIV
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Problems solved by technology

Although these ionospheric delay correction methods can weaken the influence of the ionosphere, the remaining residual error of the ionospheric delay still has a great influence on the positioning results

Method used

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  • Single-frequency PPP ionosphere weighting method based on region CORS
  • Single-frequency PPP ionosphere weighting method based on region CORS
  • Single-frequency PPP ionosphere weighting method based on region CORS

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Embodiment Construction

[0087] The present invention will be further described below in conjunction with the accompanying drawings.

[0088] Such as figure 1 As shown, a kind of regional CORS-based single-frequency PPP ionospheric weighting method provided by the present invention comprises the following steps:

[0089] (1) Estimation of the ionosphere by regional CORS sites

[0090] Based on the original observations of the regional CORS network, and using the precise coordinates of each reference station in the region, a non-difference and non-combination model Kalman filter is constructed to estimate the high-precision ionospheric delay value including satellite hardware delay items;

[0091] The non-integrated PPP uses the dual-frequency original observations of Global Navigation Satellite Systems (GNSS) as the basic observations, and its dual-frequency observation equation can be expressed as:

[0092] P k , i ...

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Abstract

The invention discloses a single-frequency PPP ionosphere weighting method based on a region CORS. Further improvement of single-frequency PPP moving station precision is mainly restricted by ionosphere delaying, and the correction precision of the regional continuous base station network precision modeling local region ionosphere delaying method to single-frequency users of sparse base station regions is limited. The single-frequency PPP ionosphere weighting method is based on the CORS network, non-combined PPP is conducted on base station data, a region ionosphere model is built, and satellite hardware delaying and receiver hardware delaying are separated to extract the ionosphere delaying value in the tilt direction of the satellite. The single-frequency PPP ionosphere weighting method based on the region CORS takes full advantage of high-precision ionosphere delaying information provided by region station points, and can effectively improve the single-frequency PPP user convergence time and positioning precision and achieve single-frequency PPP user centimeter-level high-precision positioning.

Description

technical field [0001] The present invention relates to the field of positioning and monitoring, in particular to a single-frequency PPP (Precise Point Positioning, precise point positioning) ionospheric weighting method based on regional CORS (Continuous Operational Reference System, continuous operation satellite positioning service integrated system), which is a regional An important part of CORS-enhanced PPP high-precision and fast positioning research. Background technique [0002] With the perfection and development of the satellite positioning system, the accuracy and reliability of the positioning and monitoring targets are getting higher and higher. In high-precision positioning and navigation calculations, the relative positioning method is usually used, but when the distance between the rover stations is long, the differential positioning method is affected by errors and cannot quickly and accurately obtain precise positioning results. Therefore, for large-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07
CPCG01S19/07
Inventor 潘树国汪登辉杨徉
Owner SOUTHEAST UNIV
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