Method and apparatus for determining universal coordinated time from Loran-C transmissions
US5220333A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R40/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining Universal Coordinated Time from Loran-C transmissions at at least two Group Repetition Intervals. With time known to within a few seconds of Universal Coordinated Time, and position known to within approximately five miles, the present invention permits time transfer substantially to Universal Coordinated Time by receiving first and second Loran-C transmissions at first and second Group Repetition Intervals. Then, a coincidence interval between the two Group Repetition Intervals is calculated, and time is transferred to coincide substantially with Universal Coordinated Time based on the calculated coincidence interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.