Method and device for determining global ionized layer grid model

An ionosphere and model technology, applied in the direction of measuring devices, satellite radio beacon positioning systems, radio wave measurement systems, etc., can solve the problems of ionospheric data incapability, systematic deviation, fusion, etc.

Inactive Publication Date: 2017-02-15
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for determining a global ionospheric grid model, which are used to solve the problem that there is a

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  • Method and device for determining global ionized layer grid model
  • Method and device for determining global ionized layer grid model
  • Method and device for determining global ionized layer grid model

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Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] figure 1 It exemplarily shows a schematic flowchart of a method for determining a global ionospheric grid model provided by an embodiment of the present invention.

[0064] Such as figure 1 As shown, a method for determining a global ionospheric grid model provided in an embodiment of the present invention includes the following steps:

[0065] Step 101, according to the GNSS observation data, determine the total electron content VTEC in the first ver...

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Abstract

The invention provides a method and device for determining a global ionized layer grid model, belongs to the field of global navigation systems and space environment monitoring, and is used for solving the problems that systematic bias exists among various ionized layer data, and the various ionized layer data cannot be fused in a simple manner. The method includes determining an ionized layer VTEC1 in a zenith direction through formulae (1) and (2) according to GNSS observed data; adopting a formula (3) and combined with a smooth and resampling method to obtain an ionized layer VTEC2 in the zenith direction according to data of ocean height-measuring satellites; according to a double-frequency phase observed value of a DORIS, determining STEC<bias> through a formula (4), through a GIM interpolation principle, the double-frequency phase observed value of the DORIS and the STEC<bias>, determining corrected STEC, and determining an ionized layer VTEC3 in the zenith direction according to the corrected STEC and a calibration method; and performing fitting on the ionized layers VTEC1, VTEC2 and VTEC3 according to a spherical harmonics model, and determining the global ionized layer grid model based on multi-source data fusion.

Description

technical field [0001] The invention belongs to the field of global navigation system and space environment monitoring, and more specifically relates to a method and device for determining a global ionospheric grid model. Background technique [0002] The global ionospheric grid model (English: Global IonosphereMaps English abbreviation: GIM) established using GNSS (English: Global Navigation Satellite System, Chinese abbreviation: Global Satellite Navigation System) data is an important means to study ionospheric changes. However, the distribution of GNSS tracking stations is uneven, and the accuracy and reliability of GIM in areas lacking GNSS tracking stations such as oceans are low. [0003] The orbit of the ocean altimetry satellite can cover most of the ocean area, and the VTEC (English: Vertical Total Electron Content, Chinese abbreviation: vertical total electron content) at the sub-satellite point of the orbit can be obtained by transmitting dual-frequency signals. ...

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Application Information

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IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 陈鹏
Owner XIAN UNIV OF SCI & TECH
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