User Tools

Site Tools


instruments:ceilo:ceilometer_jen

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
instruments:ceilo:ceilometer_jen [2014/01/17 12:24] – [Specifications] janinstruments:ceilo:ceilometer_jen [2021/01/22 22:17] (current) – external edit 127.0.0.1
Line 1: Line 1:
 ====== Ceilometer Jenoptik CHM15k Nimbus ====== ====== Ceilometer Jenoptik CHM15k Nimbus ======
-//Mentor: AHirsikko//+ 
 +//Mentor: [[http://www.geomet.uni-koeln.de/das-institut/mitarbeiter/schween/|J.HSchween]]//
  
 ===== Principle ===== ===== Principle =====
-The CHM 15k ceilometer measures aerosol height profiles. It determines cloud base heights and penetration depths, mixing layer height and vertical visibility. Within its operating range up to 15 kilometers (50,000 feet), it reliably detects multiple cloud layers and cirrus clouds. The CHM 15k mesures and processes data using the LIDAR technique.+The CHM 15k ceilometer is a robust, autonomous and low power lidar for measuring vertical profiles of backscatter signal from aerosol particles and hydrometeorsFrom the backscatter profiles cloud base heights and signal penetration depths, aerosol layer heights and vertical visibility are determined. Within its operating range up to 15 kilometers (50,000 feet), the CHM 15k reliably detects multiple cloud layers and cirrus clouds. 
  
 ===== Instrument ===== ===== Instrument =====
 {{:instruments:ceilo:chm15k.jpg?200|}}\\ {{:instruments:ceilo:chm15k.jpg?200|}}\\
-Current setup at [[http://www.fz-juelich.de/|Research Center Jülich]] on the roof of IEK-8:  [[http://www.jenoptik.com/en_40156_chm_15k_family|Jenoptik]] CHM15k ceilometer.+CEILOMETER (CHM 15k) at [[http://www.fz-juelich.de/|Forschungszentrum Jülich]] on the roof of the IEK-8 ([[http://www2.fz-juelich.de/icg/icg-2/|Institut für Energie- und Klimaforschung: Troposphäre]]).
  
 ===== Data ===== ===== Data =====
 +  * If you are interested in receiving data please contact: [[http://www.geomet.uni-koeln.de/allgemein/das-institut/mitarbeiter/detailansicht/f93e43fbbe15a16f8a85792ec07ed119/?tx_wtdirectory_pi1[show]=42&tx_rggooglemap_pi1[poi]=42|U. Löhnert]]
 +  * [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser2.html?site=JOYCE&date=-1&UpperLeft=Ceilo_chm15k_raw&UpperRight=Ceilo_chm15k_uncalibrated&LowerRight=default&LowerLeft=default|quicklook archive]]
 +  * Current observations:
  
 <html> <html>
 <center> <center>
-<a href="http://gop.meteo.uni-koeln.de/~hatpro/jue/ceilo/jenopt/" target="_blank"> +<a href="http://atmos.meteo.uni-koeln.de/~hatpro/jue/ceilo/jenopt/" target="_blank"> 
-<img src="http://gop.meteo.uni-koeln.de/~hatpro/jue/ceilo/jenopt/ceilo_jenoptik.png" width=420>+<img src="http://atmos.meteo.uni-koeln.de/~hatpro/jue/ceilo/jenopt/ceilo_jenoptik.png" width=420>
 </a>  </a> 
-<br>click to enlarge 
 </center> </center>
 </html>      </html>     
        
 +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 ==== ===== History ====
 ^  Period  ^  Place  ^  Project  ^ ^  Period  ^  Place  ^  Project  ^
Line 36: Line 40:
 | Pulse duration | 1 ... 5 ns | | Pulse duration | 1 ... 5 ns |
 | Pulse repetition rate (prr) | 5 - 7 kHz | | Pulse repetition rate (prr) | 5 - 7 kHz |
-| Number of pulses per profile | 105600±1000((varies in time)) |+| Number of pulses per profile | 105650±100((varies in time)) |
 | Beam diameter | expanded to: 90 mm | | Beam diameter | expanded to: 90 mm |
 | Laser divergence | < 0.3 mrad | | Laser divergence | < 0.3 mrad |
 | FOV Receiver | 0.45 mrad | | FOV Receiver | 0.45 mrad |
 +| range gate length | 15m |
 +| temporal resolution | 15sec |
 | Voltage | 230VAC, +/- 10 % / 50 Hz | | Voltage | 230VAC, +/- 10 % / 50 Hz |
 | Max. power consumption | 0,8 kW (all heater are running) | | Max. power consumption | 0,8 kW (all heater are running) |
 +| Manufacturer | [[http://www.jenoptik.com/en_home|Jenoptik]] |
  
      
instruments/ceilo/ceilometer_jen.txt · Last modified: 2021/01/22 22:17 by 127.0.0.1