GPS correction methods, apparatus and signals
US6862526B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Apr 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus are described and illustrated for producing GPS corrections, comprising: collecting measurements from a plurality of network reference stations; determining network corrections from the measurements; determining residual errors at one or more vernier-cell reference stations; and preparing vernier-cell corrections to compensate the residual errors within a vernier-cell region. Network correction streams are described and illustrated which contain network corrections derived from a plurality of network reference stations and residual error corrections derived from one or more vernier-cell reference stations. Methods and apparatus are described for employing such network correction streams in a virtual reference station to produce corrections and/or virtual measurements for use in a GPS receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.