Using code minus carrier measurements to mitigate spatial decorrelation errors caused by ionosphere delays
US9921314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Feb 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Ground-Based Augmentation System (GBAS) includes a plurality of Global Navigation Satellite System (GNSS) reference receivers configured to receive and process GNSS satellite measurements. The GBAS further includes at least one processing module communicatively coupled to the plurality of GNSS reference receivers, configured to: determine a respective ionosphere quality metric along lines of sight for of observable GNSS satellites using code minus carrier measurements from the observable GNSS satellites; define one or more valid ionosphere regions where at least one respective ionosphere quality metric meets a threshold; determine which of the observable GNSS satellites have an ionosphere pierce point within the one or more valid ionosphere regions; and output at least one overbounded Vertical Ionosphere Gradient standard deviation (σvig) corresponding to the one or more valid ionosphere regions and an indication of which observable GNSS satellites have an ionosphere pierce point within the one or more valid ionosphere regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.