chm15k
Table of Contents
Jenoptik/Lufft CHM15k Ceilometer
Jenoptik CHM15k ceilometer installed at Jülich
- Current observations (click on image):
The figure shows raw backscatter signal as functions of time and height. Red curves indicate cloud base heights and blue curves indicate aerosol layer heights as derived by the measurement software.
History
| Period | Place | Project |
|---|---|---|
| 03/2013 - today | Research Center Jülich, Germany | TR32 |
Specifications
| Parameter | Specification |
|---|---|
| Wavelength | 1064 nm |
| Bandwidth | 0.1 nm |
| Energy per pulse | 8µJ |
| Long-time stability over 12 month (prr) | < 10 % |
| Pulse to pulse variance of laser energy | < 3 % |
| Pulse duration | 1 … 5 ns |
| Pulse repetition rate (prr) | 5 - 7 kHz |
| Number of pulses per profile | 105650±1001) |
| Beam diameter | expanded to: 90 mm |
| Laser divergence | < 0.3 mrad |
| FOV Receiver | 0.45 mrad |
| range gate length | 15m |
| temporal resolution | 15sec |
| Voltage | 230VAC, +/- 10 % / 50 Hz |
| Max. power consumption | 0,8 kW (all heater are running) |
| Manufacturer | Jenoptik, today CHM15k is produced by Lufft |
1)
varies in time
chm15k.txt · Last modified: 2022/01/20 21:59 by bpospich