Technique for determining relative yaw using phase windup
US7123187B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2004 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Apr 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A technique uses “phase windup” to determine relative yaw of a craft from a plurality circularly polarized signals transmitted from one or more transmission sources. A first difference in carrier phase measurements taken simultaneously at time t1 is determined for first and second circularly polarized signals from a given transmitting source A second difference is then determined from simultaneous carrier phase measurements taken at time t2. A third difference, which is the difference between the first and second differences, is then used to determine the relative yaw based on a difference in wavelengths of the two signals. If more than one transmitting source is in view, a mean average of the third differences associated with the respective transmitting sources may be used to determine the relative yaw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.