de.koeln.rrzk/amd.de.hdfd/igmk.cmnet00.l2.zcb SAMD v1.0 en HD(CP)2 hdfd_igmk_cmnet00_l2_zcb HD(CP)2 long term observations, cloud base altitude data of Ceilometer network (no. 00), HD(CP)2 full domain observation by GeoMet, Uni Cologne, data version 03 Ceilometer cloud base altitudes Christopher Frank (cfrank@meteo.uni-koeln.de) University of Cologne Institute for Geophysics and Meteorology 2017-08-24 16:44:32 based on CF-1.6 external Ceilometer data received from DWD and adapted with create_hdcp_cmnet_v03.sh by University of Cologne. v01: Removed variable instr_type because information is not trustworthy. Corrected variable time_bnds. Corrected variables lat and lon which were switched. v02: Raw file format changed since 1. August 2013, new reading routine. v03: Corrected variable time which contained wrong years for 2009-2011, changed latitude and longitude to floating numbers NETCDF3_CLASSIC 0.3 daily 2 For non-commercial use only. This data is subject to the HD(CP)2/SAMD data policy to be found at https://doi.org/10.25592/uhhfdm.9823 and in the HD(CP)2/SAMD Observation Data Product Standard https://doi.org/10.5281/zenodo.1741363. Data of DWD Ceilometer network, provided by IMGK, University of Cologne. Institute of Geophysics and Meteorology, University of Cologne Susanne Crewell +49 221 470 5286 crewell@meteo.uni-koeln.de 2007-01-01 2018-04-30 600 none none Ground-based Ceilometer network. For exact location see respective variables in netCDF file. Cloud base altitude for a maximum of three cloud layers. Time steps where an instrument did not measure are flagged with _FillValue. Time steps where an instrument did measure but detected no cloud - either because of clear sky or because the lowest cloud layer was too thick to detect potential cloud layers lying above - are flagged with missing_value. Second and third cloud layer only detectable if first (lowest) cloud layer is not optically too thick. _FillValue=-999 indicates that the respective instrument was measuring but that no zcb was retrieved. The reason could be either clear-sky or an undetected upper cloud layer because the lowest cloud layer was too optically thick to be penetrated. missing_value=-888 indicates that the respective instrument was not measuring. Ceilometer network none none none none The network consists of different instrument types. For details on the instruments' specifications and on the retrievals please check the cited manuals. Long term observations Full domain observations Networks Ceilometer Long term observations Full domain observations Variable groups Cloud properties
manual
2011 none Jenoptik CHM 15k - Nimbus Ceilometer none Documentation number: 014008-550-22-HB1-G001. Copyright by ESW GmbH.
manual
1999 none CEILOMETER CT25K User’s Guide none Document version number: CT25K-U059en-2.1. Copyright by Vaisala. 27 3 161 2 time time time time seconds since 1970-01-01 00:00:00 UTC stat_id n_station none station_id none stat_long n_station, stat_long_len none station_long_name none lat n_station latitude latitude degrees_north lon n_station longitude longitude degrees_east zsl n_station altitude altitude_above_mean_sea_level m zcb time, n_station, n_cloudlayer cloud_base_altitude cloud_base_altitude_above_mean_sea_level m