Ground proximity warning system with time and altitude based mode switching
US4433323A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Feb 4, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/935
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To increase the effectivity of warnings and to decrease nuisance warnings in a ground proximity warning system having several modes of operation, the switching from one mode to another is done as a function of radio altitude and time. In addition, in a ground proximity warning system where a warning signal is generated in accordance with a predetermined relationship between flight parameters, one or more of these parameters can be varied as a function of radio altitude and time in order to, for example, increase the altitude above ground as a function of radio altitude and time from take-off that a terrain clearance warning is generated or to decrease as a function of radio altitude and time, the radio altitude below which a negative climb after take-off warning is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.