Method for calibrating spatial errors, and method and system for estimating the attitude of a vehicle
US9846243B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 2013 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Oct 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calibrating spatial errors induced by phase biases having a detrimental effect on the measurements of phase differences of radio signals received by three unaligned receiving antennas of a vehicle. An inter-satellite angular deviation of a pair of satellites is estimated in two different ways: on the basis of the respective positions of the vehicle and of the satellites to obtain a theoretical inter-satellite angular deviation; and on the basis of the respective directions of incidence of the satellites relative to the vehicle, which are determined from phase measurements, to obtain an estimated inter-satellite angular deviation. The space errors are estimated on the basis of said theoretical and estimated inter-satellite angular deviations. Also, a method and system for estimating the attitude of a vehicle, in particular a spacecraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.