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2011, 2012, 2013, 2014, 2015, 2016,

Description

Microwave Radiometer Type: HATPRO (Humidity and Temperature PROfiler) Generation 2, manufactored by Radiometer Physics GmbH, Meckenheim, Germany. HATPRO has seven K band (22.235-31.4 GHz) channels as well as seven V band channels (51.2-58.0 GHz). The brightness temeparature measurements in these band are sensitive for the humidity profile, the vertically integrated amount of cloud liquid water and the temperature profile, respectively. The files contain 14 brightness temperatures from boundary layer scans as a function of measurement time and elevation angle observing direction. Boundary layer scans are performed at the elevation angles 90, 42, 30, 19.2, 10.2 and 5.4 deg with a integration time on the order of 10s. Assuming horizontal homogeneity, these data can be used to gain a highly accurate temperature profile in the lowest 500 m above ground. Additionally included are temperature, pressure and humidity at the instrument location as well quality flags characterizing the instrument performance. Note, that brightness temperature 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. Provided uncertainties describe the expected random error of the brightness temperature channels (variance) for each measurement in addition to the covariances among the different channels. Also included is the expected systematic uncertainty for brightness temperature when carying out a absolute calibration (Maschwitz et al., 2012 in Atmospheric Measurement Techniques).

Limitations: none
Provenance: none
Comments: Home site of LACROS at TROPOS in Leipzig, Germany. LACROS is deployed here when not on campaign.

• Source: RPG Microwave Radiometer HATPRO, Generation 2
• Descriptive Instrument location: The instrument is part of the LACROS facility that is operated in the area around TROPOS in Leipzig.

• PID: de.koeln.rrzk/amd.de.sups/lac.mwrBL00.l1.tb
• Project: HD(CP)2
• Level: 1
• Updated version: 00
• File format: NETCDF3_CLASSIC
• Convention: CF-1.6
• Average File Size Uncompressed: 0.1 Mb
• File name: sups_lac_mwrBL00_l1_tb_v[VV]_[YYYYMMDDhhmmss].nc
• Start: 2011-02-09
• End: 2016-09-23

Name	Dimension	CF standard_name	long_name	Unit
hur	time	relative_humidity	relative humidity	1
pa	time	air_pressure	air pressure	Pa
ta	time	air_temperature	air temperature	K
tb	time, n_angle, n_freq	brightness_temperature	brightness temperatures	K
tb_bias	n_freq	none	systematic calibration uncertainty of brightness temperature, one standard deviation	K
tb_cov	n_freq, n_freq	none	error covariance matrix of brightness temperature channels	K*K
zsl	none	altitude	altitude above mean sea level	m

Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany

Patric Seifert (seifert@tropos.de)

S. Crewell and U. Loehnert,Accuracy of boundary layer temperature profiles retrieved with multi-frequency, multi-angle microwave radiometry

Rose, T. et al.,A network suitable microwave radiometer for operational monitoring of the cloudy atmosphere

S. Crewell and U. Loehnert,Accuracy of boundary layer temperature profiles retrieved with multi-frequency, multi-angle microwave radiometry

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 .