cops_supr_rlidar_bs532_5_d: particle backscattering coeff. at 532nm from BASIL
Dataset
Summary
The Raman lidar system BASIL (Univ. of BASILicata Raman Lidar) makes use of a Nd:YAG laser source equipped with second and third harmonic generation crystals and capable of emitting pulses at 355, 532, and 1064 nm, with an average power of 7, 8, and 7 W, respectively. Laser beams at the three wavelengths are simultaneously transmitted along the zenith direction. The receiver is built around a telescope in Newtonian configuration (45 cm diameter).The Raman receiving module is equipped with 9 measurement channels located on a low weight and encumbrance optical bench. Collected radiation is split into these 9 channels by means of dichronic or partially reflecting mirrors: specifically, two signal portions are fed into the channels used for temperature measurements (Low J- and High J-channels), while two portions are sent to the water vapor (407.5 nm) and nitrogen (386.7 nm) Raman channels. Another two signal portions are fed into the 355 and 532 nm elastic channels. Relative humidity is obtained from above mentioned lidar measurements of atmospheric temperature and mixing ratio, while lidar ratio at 355/532 nm is obtained from the lidar measurements of particle backscatter and extinction at 355/532 nm. The size of the instrument is 6x2.3xH2.4 m. The instrument is transportable based on the use of an air-ride trailer. Power consumption is 6000 VA (i.e. 4000 VA for laser source and 2000 VA for receiver/data acquisition system).The University of Rome implemented two additional small receivers (50 mm diameter) located close to the main telescope, which are used for the detection of the low level signals at 532 nm (parallel and cross-polarized) and 1064 nm. Specific information and improved particle backscatter analysis can be provided on request (email:
Longitude 8.07
Latitude 48.64
Altitude: 140 m relativ to NN
Temporal Coverage
2007-06-01
to 2007-08-31
(calendrical)
Use constraints
For scientific use only. No commercial use allowed.
Please be aware of the common COPS/GOP/D-PHASE data policy (http://cops.wdc-climate.de/)
Data Catalog
World Data Center for Climate
Access constraints
Authorized Persons
Size
180.34 MiB (189104115 Byte)
Format
NetCDF
Status
completely archived
Creation Date
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Accuracy report
For a time resolution of 5 min and a vertical resolution of 150 m, typical random error at 2 km altitude for day-time measurements is: ...
Description
For a time resolution of 5 min and a vertical resolution of 150 m, typical random error at 2 km altitude for day-time measurements is: -5% for the particle backscattering coefficient (at all wavelengths), while for night-time measurements is: -2% for the particle backscattering coefficient (at all wavelengths). Based on 5 min integration time, range for day-time measurements is: 0 km lt z lt tropopause for particle backscatter (at all wavelengths), while for night-time measurements is: 0 km lt z lt tropopause for particle backscatter (at all wavelengths).
Consistency report
For the present field campaign, vertical resolution of the rough data was set to 30 m. Temporal...
Description
For the present field campaign, vertical resolution of the rough data was set to 30 m. Temporal resolution of the rough data was set to 1 min from start of COPS till 12 June 2007, 20 sec from 14 June till 30 July 2007, and 5 sec from 31 July 2007 till end of COPS.