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To get a year dataset please use one of the links below to download the wget script:
2011, 2012, 2013, 2014, 2015, 2016, 2017,

Description

The used microwave radiometer TOPHAT has seven K band (22.235-31.4 GHz) channels that are sensitive to the humidity profile (hua), the path integrated amount of cloud liquid water (clwvi) and the path integrated amount of water vapor (prw). These files contain clwvi as a function of measurement time, elevation and azimuth angle observing direction. clwvi is based on multi-variate regression retrievals. Provided uncertainties describe the expected standard error of prw. Note, that clwvi values are given for all available times so that it is up to the user to decide whether or not to use the values if quality flags are set. Additionally included are temperature, pressure and humidity at the instrument location as well quality flags characterizing the instrument and retrieval performance. For details on TOPHAT at the JOYCE supersite please refer to http://gop.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:tophat:tophat. TOPHAT was installed at JOYCE on 22.7.2010 as has been measuring in a 24/7 mode since then.

Limitations: none
Provenance: MWR is part of JOYCE, data processed by IMGK, University of Cologne
Comments: clwvi errors are given as a function of retrieval elevation angle. Note, actual observations may occur at different angles. Errors are then interpolated.

• Source: RPG Microwave Radiometer HATPRO, Generation 2
• Descriptive Instrument location: The instrument is located at the JOYCE supersite, on top of the roof of IEK-8 (building 5.2) of the Forschungszentrum Juelich.

• PID: de.koeln.rrzk/amd.de.sups/joy.mwr00.l2.clwvi
• Project: HD(CP)2
• Level: 2
• Updated version: 01
• File format: NETCDF3_CLASSIC
• Convention: CF-1.6
• Average File Size Uncompressed: 2 Mb
• File name: sups_joy_mwr00_l2_clwvi_v[VV]_[YYYYMMDDhhmmss].nc
• Start: 2011-01-01
• End: 2017-06-26

Name	Dimension	CF standard_name	long_name	Unit
clwvi	time	atmosphere_cloud_liquid_water_content	none	kg m-2
clwvi_err	n_ret	none	standard error of atmosphere cloud liquid water content at retrieval elevation angle	kg m-2
clwvi_off_zenith	time	none	off zenith path integrated liquid water	kg m-2
clwvi_off_zenith_offset	time	none	off zenith path integrated liquid water offset correction based on brightness temperature offset	kg m-2
clwvi_offset	time	none	atmosphere_cloud_liquid_water_content offset correction based on brightness temperature offset	kg m-2
clwvi_offset_zeroing	time	none	atmosphere_cloud_liquid_water_content clear sky zeroing offset correction	kg m-2
zsl	none	altitude	altitude above mean sea level	m

Research Center Juelich Institute for Energy and Climate Research IEK8

Ulrich Loehnert (ulrich.loehnert@uni-koeln.de)

S. Crewell and U. Loehnert,Accuraccy of cloud liquid water path from ground-based microwave radiometry. Part I. Dependency on Cloud model statistics.

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 .