<?xml version="1.0" encoding="UTF-8"?>
<metadata creationDate="Thu, 24 Mar 2022"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<PID>de.koeln.rrzk/amd.de.sups/lac.mwr00.l2.prw</PID>
	<standard>SAMD v1.0</standard>
	<language>en</language>
	<project>HD(CP)2</project>
	<dsName version="00">sups_lac_mwr00_l2_prw</dsName>
	<dsTitle>HD(CP)2 long term observations, path of integrated water vapor
		data of Microwave radiometer (no. 00), by Supersite LACROS, data
		version 00</dsTitle>
	<subtitle>Microwave radiometer retrieved prw</subtitle>
	<dsAuthor>Ulrich Loehnert (loehnert@meteo.uni-koeln.de)</dsAuthor>
	<institution>Leibniz Institute for Tropospheric Research (TROPOS),
		Leipzig, Germany</institution>
	<processingDate>Fri Aug 4 19:00:20 2017</processingDate>
	<conventions>CF-1.6</conventions>
	<dependencies>sups_lac_mwr00_l1_tb_v00</dependencies>
	<versionHistory>Data processed with mwrpro-v04 by TROPOS; Retrieval
		version: deb_rt00</versionHistory>
	<fileFormat>NETCDF3_CLASSIC</fileFormat>
	<fileAverageSize unit="[MB]">2</fileAverageSize>
	<datatype>daily</datatype>
	<level>2</level>
	<licence>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.</licence>
	<provenance>none</provenance>
	<contactPersons>
		<contactPerson number="1">
			<institute>Leibniz Institute for Tropospheric Research, Leipzig</institute>
			<forename>Patric</forename>
			<surname>Seifert</surname>
			<code>+49</code>
			<phone>341 2717-7080</phone>
			<email>seifert@tropos.de</email>
		</contactPerson>
	</contactPersons>
	<temporalExtent>
		<startDate>2011-02-09</startDate>
		<endDate>2016-09-23</endDate>
	</temporalExtent>
	<temporalResoultion unit="[s]">2 - 3</temporalResoultion>
	<horizontalResoultion unit="[m]">n.a.</horizontalResoultion>
	<verticalResoultion unit="[m]">n.a.</verticalResoultion>
	<location>The instrument is part of the LACROS facility that is
		operated in the area around TROPOS in Leipzig.</location>
	<productDescription>The used microwave radiometer HATPRO 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 prw as a function of measurement time, elevation and
		azimuth angle observing direction. prw is based on multi-variate
		regression retrievals. Provided uncertainties describe the expected
		standard error of prw. Note, that prw 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.</productDescription>
	<limitations>none</limitations>
	<comments>prw errors are given as a function of retrieval elevation
		angle. Note, observations may occur at different angles
		(interpolation).</comments>
	<instruments>
		<instrument number="1">
			<source>RPG Microwave Radiometer HATPRO, Generation 2</source>
			<latitude unit="[°]">51.353</latitude>
			<longitude unit="[°]">12.434</longitude>
			<altitude unit="[m]">117</altitude>
			<height unit="[m]">2</height>
			<specification>none</specification>
		</instrument>
	</instruments>
	<keywordLists>
		<keywordList number="1">
			<experimentType>Long term observations</experimentType>
			<measurementType>Local observations</measurementType>
			<mainGroup>Variable groups</mainGroup>
			<variableGroup>Atmospheric state</variableGroup>
		</keywordList>
		<keywordList number="2">
			<experimentType>Long term observations</experimentType>
			<measurementType>Local observations</measurementType>
			<mainGroup>Instrument groups</mainGroup>
			<variableGroup>MWR</variableGroup>
		</keywordList>
		<keywordList number="3">
			<experimentType>Long term observations</experimentType>
			<measurementType>Local observations</measurementType>
			<mainGroup>Supersites</mainGroup>
			<variableGroup>LACROS</variableGroup>
		</keywordList>
	</keywordLists>
	<references>
		<reference number="1">
			<form>paper</form>
			<publicationDate>2003</publicationDate>
			<author>S. Crewell and U. Loehnert</author>
			<title>Accuraccy of cloud liquid water path from ground-based
				microwave radiometry. Part I. Dependency on Cloud model statistics.</title>
			<abstract>none</abstract>
			<publish>Radio Science, 38(3), 8041, 2003, doi:10.1029/2002RS002654.</publish>
		</reference>
	</references>
	<dimensions>
		<n_ret>1</n_ret>
		<nv>2</nv>
		<time>58425</time>
	</dimensions>
	<variables>
		<variable>
			<name>time</name>
			<dimension>time</dimension>
			<standard_name>time</standard_name>
			<long_name>none</long_name>
			<units>seconds since 1970-01-01 00:00:00 UTC</units>
		</variable>
		<variable>
			<name>lat</name>
			<dimension>none</dimension>
			<standard_name>latitude</standard_name>
			<long_name>none</long_name>
			<units>degree_north</units>
		</variable>
		<variable>
			<name>lon</name>
			<dimension>none</dimension>
			<standard_name>longitude</standard_name>
			<long_name>none</long_name>
			<units>degree_east</units>
		</variable>
		<variable>
			<name>zsl</name>
			<dimension>none</dimension>
			<standard_name>altitude</standard_name>
			<long_name>altitude above mean sea level</long_name>
			<units>m</units>
		</variable>
		<variable>
			<name>azi</name>
			<dimension>time</dimension>
			<standard_name>sensor_azimuth_angle</standard_name>
			<long_name>none</long_name>
			<units>degree</units>
		</variable>
		<variable>
			<name>ele</name>
			<dimension>time</dimension>
			<standard_name>none</standard_name>
			<long_name>sensor elevation angle</long_name>
			<units>degree</units>
		</variable>
		<variable>
			<name>ele_ret</name>
			<dimension>n_ret</dimension>
			<standard_name>none</standard_name>
			<long_name>retrieval elevation angle</long_name>
			<units>degree</units>
		</variable>
		<variable>
			<name>prw</name>
			<dimension>time</dimension>
			<standard_name>atmosphere_mass_content_of_water_vapor</standard_name>
			<long_name>none</long_name>
			<units>kg m-2</units>
		</variable>
		<variable>
			<name>prw_offset</name>
			<dimension>time</dimension>
			<standard_name>none</standard_name>
			<long_name>atmosphere_mass_content_of_water_vapor offset correction
				based on brightness temperature offset</long_name>
			<units>kg m-2</units>
		</variable>
		<variable>
			<name>prw_off_zenith</name>
			<dimension>time</dimension>
			<standard_name>none</standard_name>
			<long_name>off zenith path integrated water vapor</long_name>
			<units>kg m-2</units>
		</variable>
		<variable>
			<name>prw_off_zenith_offset</name>
			<dimension>time</dimension>
			<standard_name>none</standard_name>
			<long_name>off zenith path integrated water vapor offset correction
				based on brightness temperature offset</long_name>
			<units>kg m-2</units>
		</variable>
		<variable>
			<name>prw_err</name>
			<dimension>n_ret</dimension>
			<standard_name>none</standard_name>
			<long_name>These values denote the standard error of atmosphere mass
				content of water vapor or off zenith path integrated water vapor at
				the corresponding retrieval elevation angle.</long_name>
			<units>kg m-2</units>
		</variable>
		<variable>
			<name>flag</name>
			<dimension>time</dimension>
			<standard_name>none</standard_name>
			<long_name>quality control flags</long_name>
			<units>none</units>
		</variable>
	</variables>
</metadata>