Method of and apparatus for integration of Loran-C and satellite navigation system (SNS) technologies for improved system accuracy, availability and integrity
First Claim
1. In a satellite navigation system having a plurality of satellite transmitting radio navigation signals to ground user receivers and also communicating augmenting data messages to improve the accuracy and integrity of the navigation signals, a method, that comprises, at each ground receiver, receiving also Loran-C radio navigation signals, and integrating the received augmented satellite navigation signals and messages with the received Loran-C signals to use the Loran-C signals as a communications signal and a supplemental navigation signal;
- timing the Loran-C signals to provide position information additional to that of the satellite navigation signals and to smooth user position and velocity data between any satellite signal augmentation data messages and between any added and deleted satellites communication available to the user receiver position and velocity determination.
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Accused Products
Abstract
A method of apparatus for integrating Loran-C and satellite navigation system technologies in a manner in which the Loran-C navigation signal transmissions are further modulated to provide a communications signal and a supplemental navigation signal, timed to provide additional position information, and used to smooth user position and velocity data between augmentation data messages and between adding and deleting or losing satellite contributing signals.
46 Citations
15 Claims
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1. In a satellite navigation system having a plurality of satellite transmitting radio navigation signals to ground user receivers and also communicating augmenting data messages to improve the accuracy and integrity of the navigation signals, a method, that comprises, at each ground receiver, receiving also Loran-C radio navigation signals, and integrating the received augmented satellite navigation signals and messages with the received Loran-C signals to use the Loran-C signals as a communications signal and a supplemental navigation signal;
- timing the Loran-C signals to provide position information additional to that of the satellite navigation signals and to smooth user position and velocity data between any satellite signal augmentation data messages and between any added and deleted satellites communication available to the user receiver position and velocity determination.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for integrating Loran-C navigation and communications signals and satellite navigation system radio navigation signals and augmentation data message signals, including one or more of satellite clock offset, orbital parameters propogation conditions and/or pseudo range corrections, for improving system accuracy, availability and integrity, said apparatus having, in combination, user ground receiver means for receiving satellite radio navigation signals and augmenting data message signals;
- at each such receiver means, Loran-C receiver means for receiving the Loran-C signals as a communications signal and a supplemental navigation signal, with means for smoothing the user positions and velocity data between the satellite signal augmentation data messages and between the added and deleted satellite communication available to the user receiver means position and velocity determination.
- View Dependent Claims (10, 11, 12, 13, 14, 15)
Specification