Positioning system
US6741209B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Oct 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/51
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a positional system intended to supplement positional information derived by means of a Global Positioning System (GPS), so as to provide positional data coverage in situations where the GPS data may be unreliable, for example due to local attenuation of satellite signals, in order to permit members of a group traversing difficult terrain to retain reasonably accurate information as to the whereabouts of the other group members should the GPS system fail. The positional system of the invention provides each group member with a readily transportable and relatively inexpensive inertial navigation system to generate approximate positional data and utilises radio location techniques to improve the accuracy of the approximate positional data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.