Passive determination of ground target location
US7359038B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jun 22, 2006 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Jul 29, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/51
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ground targets can be passively identified on uneven terrain from an observation point elevation above a known reference point, a line-of-sight inclination angle, an azimuth angle and a digital terrain elevation database wherein actual elevations of surrounding latitude and longitude coordinates are stored and retrievable. Using the observation point's elevation above the known reference point and using the line-of-sight elevation angle from the observation point to the ground target, an initial estimate of the latitude and longitude coordinates of the ground target is made and used as an index into a digital terrain elevation database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.