Two angle range and altitude measurement system and methods
US4626861A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2205/03
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A passive system and related methods for detecting range and/or elevation of a target by using an X beam antenna system and by measuring the time delay between receipt of signals in the two planes of the X beam which are received directly from the target and by measuring the time delay between receipt of signals in the two planes of the X beam which signals are emitted by the target but reflected from a remote surface. By knowing these two time delays, the height of the antenna system, the fixed angle between the two planes of the X beam and the rate of rotation of the X beam, a direct calculation is established to determine the range and/or elevation of the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.