Generating high precision ionospheric ground-truth measurements
US7289061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Jan 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method, apparatus and article of manufacture provide ionospheric ground-truth measurements for use in a wide-area augmentation system (WAAS). Ionospheric pseudorange/code and carrier phase data as primary observables is received by a WAAS receiver. A polynomial fit is performed on the phase data that is examined to identify any cycle slips in the phase data. The phase data is then leveled. Satellite and receiver biases are obtained and applied to the leveled phase data to obtain unbiased phase-leveled ionospheric measurements that are used in a WAAS system. In addition, one of several measurements may be selected and data is output that provides information on the quality of the measurements that are used to determine corrective messages as part of the WAAS system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.