Architecture for providing forecasts of GNSS obscuration and multipath
US11287531B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2021 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Jul 13, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0968
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method of providing dilution of precision (DOP) forecasts for GNSS navigation and optionally degree of confidence, for routing of vehicles or alerting humans in vehicles: accessing a 3D map of an area including structure solids and generating cuboids in spaces not contained in the structure solids, and iteratively over time increments, calculating GNSS satellites visible from the cuboids using the 3D map and, using at least the calculated visibility, determining a DOP forecast for GNSS signals observable in the cuboids at the time increments. The disclosed method also includes compressing the calculated DOP forecast spatially and temporally, and distributing the compressed DOP forecast via a content delivery network (CDN), responsive to queries from requestors to an API of the CDN, whereby the requestors' systems can take into account the DOP forecast for routing the vehicles or alerting the humans in the vehicles to a predicted navigation impairment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.