System and method for real time subset geometry screening satellite constellations
US9476985B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2013 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Feb 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for real time subset geometry screening comprises the steps of determining a list of satellites in view of a ground based augmentation system in a navigation satellite system for a subsequent time interval in the future, defining at least one set of subset geometries from the list of available satellites, calculating a respective first σvig for each of the at least one set of subset geometries, setting a respective broadcast σvig for each set of subset geometries as the larger of the first σvig and a second σvig, wherein the second σvig was calculated for the previous time interval, saving the first σvig for a next iteration of the method, and selecting from the plurality of broadcast σvig to match an available broadcast constellation. σvig is a vertical ionosphere gradient standard deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.