Sensing vertical and horizontal visibility
US4520360A · kind A · utility
11Cited by
12References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1982 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Sep 20, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G5/727
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Unattended measurements of horizontal and vertical visibility are broadcast, along with the results of time trend analysis so as to provide for short-term prediction of visibility. A calibration mechanism is provided along with sensors to determine mis-alignment of the apparatus. Broadcast information is particularly useful to pilots approaching unattended airports for landing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.