Ionospheric error prediction and correction in satellite positioning systems
First Claim
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1. A method for correcting ionospheric errors in a satellite positioning system (“
- SPS”
) having a SPS server with known positional coordinates and a mobile SPS receiver, the method comprising;
receiving SPS signals from SPS satellites at the SPS server;
calculating a position of the SPS server using the SPS signals from the SPS satellites;
comparing calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates;
determining ionospheric errors in response to comparing the calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates;
creating an ionospheric model of predicted ionospheric errors from the determined ionospheric errors, the ionospheric model having ionospheric model parameters; and
transmitting the ionospheric model parameters to the mobile SPS receiver, where the mobile SPS receiver uses the ionospheric model parameters to create an SPS receiver ionospheric model.
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Abstract
A GPS server capable of receiving information for use in determining ionospheric errors using mathematical formulas and sending ionospheric error correction information to GPS receivers that are in a location capable of receiving the ionospheric error correction information.
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Citations
28 Claims
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1. A method for correcting ionospheric errors in a satellite positioning system (“
- SPS”
) having a SPS server with known positional coordinates and a mobile SPS receiver, the method comprising;receiving SPS signals from SPS satellites at the SPS server; calculating a position of the SPS server using the SPS signals from the SPS satellites; comparing calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates; determining ionospheric errors in response to comparing the calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates; creating an ionospheric model of predicted ionospheric errors from the determined ionospheric errors, the ionospheric model having ionospheric model parameters; and transmitting the ionospheric model parameters to the mobile SPS receiver, where the mobile SPS receiver uses the ionospheric model parameters to create an SPS receiver ionospheric model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- SPS”
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14. A satellite positioning system (“
- SPS”
) comprising;a SPS server configured to detect ionospheric errors in received SPS signals from SPS satellites, to create an ionospheric error model of predicted ionospheric errors, to determine ionospheric model parameters from the ionospheric error model, and to transmit the ionospheric model parameters via a communication link; a mobile SPS receiver in signal communication with the SPS server via the communication link, the mobile SPS receiver configured to receive both the received SPS signals from the SPS satellites and the ionospheric model parameters transmitted from the SPS server and, in response to receiving both the received SPS signals and ionospheric model parameters the mobile SPS receiver is capable of creating the ionospheric error model using the ionospheric model parameters to compensate for the ionospheric errors in the received SPS signals. - View Dependent Claims (15, 16, 17, 18, 19)
- SPS”
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20. A satellite positioning system (“
- SPS”
) comprising;means for detecting ionospheric errors in received SPS signals transmitted from SPS satellites at a SPS server; means for creating an ionospheric error model of predicted ionospheric errors and determining ionospheric error model parameters from the ionospheric error model in response to detecting the ionospheric errors with the detecting means; and a mobile SPS receiver in signal communication with the detecting means and creating means via a communication link, the mobile SPS receiver capable of receiving both the received SPS signals and the ionospheric model parameters, the mobile SPS receiver is capable of creating the ionospheric error model using the ionospheric model parameters to compensate for ionospheric errors in the receiver SPS signals. - View Dependent Claims (21, 22)
- SPS”
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23. A computer-readable storage medium having instructions encoded thereon executable by a computer, the instructions when executed on a computer perform the steps of:
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correcting ionospheric errors in an satellite positioning system (“
SPS”
) having a SPS server with known positional coordinates and a SPS receiver,receiving SPS signals at the SPS server; creating an ionospheric model of predicted ionospheric errors from the determined ionospheric errors, the ionospheric model having ionospheric model parameters; and transmitting the ionospheric model parameters to the SPS receiver. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification