Navigation system using external monitoring
US7548196B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | May 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A local area augmentation navigation system for determining the authenticity of the GPS signal. The system is provided with at least one reference station at a known location, a master station, a monitoring receiver, and a LAAS receiver. Each reference station receives a GPS signal from a GPS constellation and collects and outputs pseudo-range data from the GPS signal. The master station receives the pseudo-range data from the reference stations. The master station forms a correction message from the pseudo-range data and the known locations of the reference station. The master station broadcasts the correction message. The monitoring receiver receives the GPS signal from the GPS constellation and the correction message to determine the accuracy of at least one of the broadcasted correction message and the GPS signal. The LAAS receiver receives the correction message broadcast by the master station as well as a GPS signal from the GPS constellation and calculates the location of the LAAS receiver with the correction message and the GPS signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.