Detection and correction of anomalous measurements and ambiguity resolution in a global navigation satellite system receiver
US8760343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Apr 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A global navigation system includes a first navigation receiver located in a rover and a second navigation receiver located in a base station. Single differences of measurements of satellite signals received at the two receivers are calculated and compared to single differences derived from an observation model. Anomalous measurements are detected and removed prior to performing computations for determining the output position of the rover and resolving integer ambiguities. Detection criteria are based on the residuals between the calculated and the derived single differences. For resolving integer ambiguities, computations based on Cholesky information Kalman filters and Householder transformations are advantageously applied. Changes in the state of the satellite constellation from one epoch to another are included in the computations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.