User Tools

Site Tools


Jenoptik/Lufft CHM15k Ceilometer

CT25K ©B. Pospichal
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.


Period Place Project
03/2013 - today Research Center Jülich, Germany TR32


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
varies in time
chm15k.txt · Last modified: 2022/01/20 21:59 by bpospich