Method and apparatus for checking ionospheric correction parameters for satellite navigation for a vehicle

Patent metadata

Field	Value
Publication number	US-11333768-B2
Application number	US-201916400136-A
Country	US
Kind code	B2
Filing date	May 1, 2019
Priority date	May 3, 2018
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

The disclosure relates to a method for checking ionospheric correction parameters for satellite navigation for a vehicle. The method has a step of reading a provider signal from an interface with a correction data provider. The provider signal represents ionospheric correction parameters for correcting ionospheric influences for a geographic position in satellite navigation. The method also has a step of determining correction data using information relating to the state of the ionosphere between a satellite receiver of the vehicle at the geographic position and at least one satellite. The state information is defined using at least one satellite signal transmitted between the at least one satellite and the satellite receiver. The method also has a step of performing a comparison between the ionospheric correction parameters and the correction data in order to check the ionospheric correction parameters.

First claim

What is claimed is:

1. A method for checking ionospheric correction parameters for satellite navigation for a vehicle, the method comprising:
reading a provider signal from an interface with a correction data provider, the provider signal representing ionospheric correction parameters for correcting ionospheric influences for a geographic position in satellite navigation;
determining correction data using state information relating to a state of an ionosphere between a satellite receiver of the vehicle at the geographic position and at least one satellite, the state information defined using a signal change of at least one satellite signal, transmitted between the at least one satellite and the satellite receiver, as the at least one satellite signal passes through the ionosphere; and
checking the ionospheric correction parameters by comparing the ionospheric correction parameters and the correction data.

2. The method according to claim 1 , the checking the ionospheric correction parameters further comprising:
generating a comparison result that represents at least one of (i) a deviation between the ionospheric correction parameters, which are model-based, and the correction data, which are observation-based, (ii) a fluctuation in the ionospheric correction parameters, and (iii) a fluctuation in the correction data.

3. The method according to claim 2 , the checking the ionospheric correction parameters further comprising:
identifying local ionospheric interference depending on at least one of (i) the deviation between the ionospheric correction parameters and the correction data, (ii) the fluctuation in the ionospheric correction parameters, and (iii) the fluctuation in the correction data.

4. The method according to claim 1 further comprising:
supplying a check signal depending on a comparison result of the comparing to at least one of (i) the satellite receiver, (ii) the correction data provider, and (iii) a satellite navigation device of the vehicle.

5. The method according to claim 1 , wherein the satellite receiver performs at least one of (i) the reading of the provider signal, (ii) the determining of the correction data, and (iii) the checking of the ionospheric correction parameters.

6. The method according to claim 1 , wherein the signal change represents a result of a comparison of at least one signal property in relation to at least two transmission frequencies of the at least one satellite signal.

7. The method according to claim 1 , the determining the correction data further comprising:
determining correction data using state information that represents a total electron content as a characteristic variable of Earth's ionosphere, the total electron content being defined as a product of electron density and path, measured in electrons per square meter.

8. The method according to claim 1 , wherein the method is carried out by executing a computer program.

9. An apparatus for checking ionospheric correction parameters for satellite navigation for a vehicle, the apparatus having suitable units configured to:
read a provider signal from an interface with a correction data provider, the provider signal representing ionospheric correction parameters for correcting ionospheric influences for a geographic position in satellite navigation;
determine correction data using state information relating to a state of an ionosphere between a satellite receiver of the vehicle at a geographic position and at least one satellite, the state information defined using a signal change of at least one satellite signal, transmitted between the at least one satellite and the satellite receiver, as the at least one satellite signal passes through the ionosphere; and
check the ionospheric correction parameters by comparing the ionospheric correction parameters and the correction data.

10. A non-transitory machine-readable storage medium that stores a computer program for checking ionospheric correction parameters for satellite navigation for a vehicle, the computer program being configured to:
read a provider signal from an interface with a correction data provider, the provider signal representing ionospheric correction parameters for correcting ionospheric influences for a geographic position in satellite navigation;
determine correction data using state information relating to a state of an ionosphere between a satellite receiver of the vehicle at a geographic position and at least one satellite, the state information defined using a signal change of at least one satellite signal, transmitted between the at least one satellite and the satellite receiver, as the at least one satellite signal passes through the ionosphere; and
check the ionospheric correction parameters by comparing the ionospheric correction parameters and the correction data.

Assignees

• Bosch Gmbh Robert

Inventors

• Limberger Marco
• Langer Markus

Classifications

• G01S19/07 Primary

  providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections · CPC title

• G01S19/25

  involving aiding data received from a cooperating element, e.g. assisted GPS · CPC title

• G01S19/06

  employing an initial estimate of the location of the receiver as aiding data or in generating aiding data · CPC title

• G01S19/072 Primary

  Ionosphere corrections · CPC title

• G01S19/20

  Integrity monitoring, fault detection or fault isolation of space segment · CPC title