Track model constraint for GPS position
US6728637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jun 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A track model is created for use with a GPS receiver. In one embodiment, the track model is a set of planar surfaces which approximate the contiguous surface on which navigation takes place. The GPS receiver searches for an appropriate planar surface associated with its approximate position. Having found the appropriate planar surface, the GPS receiver constrains its position using the planar surface associated with its approximate position. Using the track model improves the accuracy of the computed position at the time and improves the ambiguity estimation process so that positions with greatly improved accuracy are available sooner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.