Aircraft traffic alert and collision avoidance device
US5388047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1992 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Mar 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/933
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity warning device for aircraft responds solely to transmissions from transponders. The host aircraft has a host transponder and a signal is generated therein and coupled to the device to indicate transmission of a host reply. Selective suppression is implemented based on presence of an SSR beam which is indicated by the signal. Suppression pulses have a fixed duration but randomly selected intervening durations. Data collection proceeds without regard for suppression or the presence of host replies. The shaping of data collection intervals free of interference from suppression provides for improved efficiency for later data decoding and processing. The signal is used to specially mark collected data generated by a host reply. The ability to discriminate between host and other replies allows completely new performance monitoring functions. In one case, the health of the receiver is deduced from the amplitude of host replies. In another case the effectiveness of suppression is noted by capturing host replies in the presence of a suppression pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.