Weighted dilution of precision calculation for GPS fix qualification
US7944395B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | May 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for qualifying a Satellite Positioning System (SPS) location determination. A method in accordance with the present invention comprises determining a constellation of satellites used in the location determination, making a measurement set based on signals received from the constellation of satellites, comparing the measurement set and the constellation of satellites used in the location determination to a predetermined threshold, and reporting the location determination only when the threshold is not exceeded.Such a method further optionally includes the threshold being user-selectable, the threshold being adjusted or disabled based on a pre-defined scheme, the threshold being adjusted in a sequential form based on a pre-defined scheme, and the measurement set being made in a Global Positioning System (GPS) receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.