Method of determining local electromagnetic sensor refractivity
US7869951B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2008 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Mar 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Local ES refractivity for a geographical position on a given date is determined by locating the geographical position within one of the Delaunay triangles in a grid of Delaunay triangles defined by a plurality of data points in a database containing temporal (e.g. monthly) average refractivity values at various locations around the globe. Each of the data points in the database form the vertices of the Delaunay triangles and by interpolating the temporal averaged refractivity of the vertices of the triangle enclosing the geographical position to the given date and then interpolating the refractivity of the vertices to the geographical position within the triangle, the local ES refractivity of the geographical position is estimated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.