Methods and apparatuses for reducing errors in the measurement of the coordinates and time offset in satellite positioning system receivers
US6337657B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/43
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are methods and apparatuses for generating the estimates of receiver's coordinates and/or time offset for a moment of time tn without large errors caused by short-term shading of a part of the observable global positioning satellites and also without large dynamic errors caused by the receiver movement. The receiver may be stationary or mobile (i.e., rovering). A set of snapshot-solution values for the position coordinates and time offset of the receiver at the time moment tn, and a set of predicted values for the position coordinates and time offset of the receiver at the time moment tn are generated. The accuracy of each of these sets are determined, and a set of refined estimates for the position and time offset of the receiver is generated based the snapshot solution values, the predicted position values, and the accuracies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.