Laser ceilometer signal processing means
US4289397A · kind A · utility
28Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Jul 20, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For use in a pulsed-laser lidar such as a laser ceilometer, there are shown several examples of signal processing means for separating desired pulses due to targets such as clouds from strong background signals due to suspended particles causing poor visibility. The several examples belong to a class of means having the property of applying, to an electrical signal pulse waveform, a time-distributed signed electrical weighting function having negligible total weight, with alternations of sign of weights separated by intervals of the order of the width of the desired pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.