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Method for determining an adaptive model of an electron density distribution

A technology of electron distribution and electron density, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as non-uniform data quality

Active Publication Date: 2019-09-27
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] - non-uniform data quality,

Method used

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  • Method for determining an adaptive model of an electron density distribution
  • Method for determining an adaptive model of an electron density distribution

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Embodiment Construction

[0041] figure 1 Schematically shows the map view figure 1 , where the station distribution of the IGS network is shown. An IGS network is proposed here as an example, since its stations 2 can be used in connection with the solution proposed here as static supply locations from which ion distribution data can be ascertained. exist figure 1 Different observation scenarios are emphasized in , namely regions with dense observation distribution 3 , regions with sparse observation distribution 4 , and regions with large missing data 5 .

[0042] figure 2 A diagram of a polynomial B-spline 6 is schematically shown, which can be used in the solution proposed here for the interpolation of the ascertained electron density data as a function of a defined resolution accuracy. figure 2 A polynomial B-spline with uniformly distributed base points 7 is shown as an example. Basic point 7 is formed in connection with the solution proposed here by a stationary delivery point and / or by a ...

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Abstract

The invention relates to a method for determining a model of an electron distribution in the Earth's atmosphere, which is used to correct propagation time measurements of signals emitted by earth satellites for position determination operations using signal receivers, having at least the following steps of: a) determining local electron density data relating to provision locations (2), b) determining a local resolution accuracy on the basis of a local density of provision locations, c) determining functions for interpolating the electron density distribution determined in step a) on the basis of the resolution accuracy determined in step b), d) creating the model of the electron density distribution using the data determined in step a) and the functions determined in step c).

Description

technical field [0001] The invention relates to a method for determining an adaptive model of the electron density distribution in the atmosphere, in particular in the so-called ionosphere. Background technique [0002] The ionosphere is described as the region of the upper Earth's atmosphere that extends between approximately 50km and 1000km altitude and enters the plasmasphere above. The ionosphere is characterized by an increased concentration of charged particles produced by an ionization process dependent on solar radiation. Depending on the frequency and strength of the ionization, electromagnetic signals in the ionosphere are refracted. This results in a propagation time delay. Several application areas are covered such as satellite-based positioning and navigation. In code and carrier phase observations of Global Navigation Satellite Systems (GNSS) such as US GPS or European Galileo, propagation time delays depending on ionospheric state can lead to path errors in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07
CPCG01S19/072G01S19/09
Inventor M·林贝格尔M·朗格尔
Owner ROBERT BOSCH GMBH
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