Using space-based augmentation system (SBAS) grid ionosphere vertical error (GIVE) information to mitigate ionosphere errors for ground based augmentation systems (GBAS)
US9945954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jul 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
GBAS includes reference receivers, processing module, and communication device. Processing module checks GNSS satellite measurements to determine proximity of GNSS satellite measurement's IPP to IGPs derived from SBAS geostationary satellites. Processing module determines that GNSS satellite measurement is safe for mitigation using overbounded Vertical Ionosphere Gradient standard deviation sigma-vig (σvig) when IGPs possess acceptable GIVE values. Processing module determines whether number of GNSS satellite measurements determined safe for mitigation using σvig are able to produce VPL that meets VAL required for precision approach. Communication device communicates overbounded σvig along with differential corrections and indication of which GNSS satellite measurements that are safe for mitigation using at least one overbounded σvig are able to produce VPL that meets VAL required for precision approach to GNSS receiver when number of GNSS satellite measurements determined safe for mitigation using overbounded σvig are able to produce VPL that meets VAL required for precision approach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.