Ground-based system and method to monitor for excessive delay gradients
US8094064B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2010 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Aug 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A processing function to monitor a horizontal delay gradient in satellite signals is provided. The processing function includes a satellite differencing module, a double differencing module, and a gradient estimator module. The satellite differencing module receives carrier phase measurements for at least two satellites from at least two reference receivers that have a known geometric relationship to each other. The satellites include a monitored satellite and at least one other satellite. The satellite differencing module determines differences in the carrier phase measurements between signals from the monitored satellite and at least one other satellite. The double differencing module forms double-differences between pairs of the at least two reference receivers; compensates the double-differences between the pairs for the known difference-in-position of the reference receivers; and averages the double differences. The gradient estimator module estimates a magnitude of the horizontal delay gradient based on the averaged compensated double-differences for the monitored satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.