Title:		Microwave radiometer brightness temperature and retrieval data
Location:	Courtland Airport Site for MESO18-19
Lat/Lon:	34.659014 degN, -87.344131 degE
Contact: 	Dave Turner, NOAA (dave.turner@noaa.gov) or Elizabeth Smith, NOAA (elizabeth.smith@noaa.gov)
System:  	HATPRO Microwave Radiometer; part of CLAMPS1

--- Background

A RPG HATPRO  microwave radiometer was integrated into CLAMPS-1.  This system observes downwelling microwave radiance data (expressed as brightness temperature in units of Kelvin).  These brightness temperatures span a range of frequencies from 22.2 to 60.0 GHz.  From these observations, time-series of precipitable water vapor (PWV) and liquid water path (LWP) have been retrieved using the statistical method of Turner et al. (2007).  

This microwave radiometer has a Vaisala all-weather met station included.  This station is positioned about two feet above the back of the CLAMPS trailer.  It is possible that the trailer is affecting these met station observations in some conditions.  Note that the wind directions in this file may in error if the orientation of the trailer is not accounted for in the netCDF files.  In that case, the wind direction data should be rotated 90 degrees (e.g., winds that are reported as 0 degrees (i.e., northerly) are really 270 degrees (i.e., westerly).  Note that the data files may mistakenly say that the orientation was accounted for, when it was not. Verify before using.

Note: There is a large gap in the data between 29 Dec 2018 and 15 Jan 2019.  MWR processing froze on the 29th, and due to the government shutdown it was not not noticed for several weeks.

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