MADIS Radiometer Variables - Numeric
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Code       Name                                Units      Max     Notes      Max Number   Database
                                                       QC Level               of Levels  FSL  AWIPS*
---------------------------------------------------------------------------------------------------


Profiles                                                            1           100  
--------

T         air temperature                      K            2       2                     X
TV        virtual temperature                  K            2       2                     X
TD        dewpoint temperature                 K            2       3                     X
RH        relative humidity                    %            2       3                     X
Q         specific humidity                    kg/kg        2       3                     X
DPD       dewpoint depression                  K            2       3                     X
AH        absolute humidity                    g/(m**3)     2       3                     X
WVMR      water vapor mixing ratio             kg/kg        2       3                     X
CLD       cloud liquid density                 g/(m**3)     2                             X
P         pressure                             Pa           0       4                     X
HT        geometric height                     m            0                             X


Single-level Observations
-------------------------

CBH       cloud base height                    m            2                             X
CBT       infrared cloud base temperature      K            2                             X
ILW       integrated liquid water              m            2                             X
PWV       integrated water vapor               m            2                             X


Station Information                                                
-------------------

STATYPE   station type                                      0       1                     X


MADIS Radiometer Variables - Character
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Code       Name                                Character          Notes
                                               Size
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STALOC    station location                     51                 5                       X


Notes
-----

1.  The radiometer dataset includes meteorological "profiles" from microwave
    radiometers.  The station type variable is used to specify the type of 
    radiometer that's in use, with these code values:

       Value      Meaning
       -----      -------
         1        Radiometrics WVR-1100
         2        Radiometrics WVP-1500
         3        Radiometrics TP-2500
         4        Radiometrics TP/WVP-3000
         5        Unspecified

    The number of levels (up to 100) and the heights of those levels may vary by 
    the station type.  Station types 1 through 4 all report 47 levels, from 0
    to 1 km in 100 m steps, then from 1 km to 10 km in 250 m steps.

2.  Air temperature is the temperature variable stored in the database.  The user
    can optionally select virtual temperature, which will then be calculated by 
    the MADIS API.  The QC results from air temperature will apply in either 
    case.  If virtual temperature cannot be calculated (missing or bad relative 
    humidity), and the air temperature passed all QC checks, the air temperature 
    will be returned instead, and a QC data descriptor value of "T" will be 
    assigned.  Also note that pressure is needed for the virtual temperature
    conversion; this is done by using the U.S. Standard Atmosphere calculation
    to calculate pressure from height.

3.  Relative humidity and absolute humidity are the moisture variables reported and 
    stored in the database.  The user can optionally select dewpoint temperature, 
    dewpoint depression, specific humidity, or water vapor mixing ratio.  These 
    values will then be calculated by the MADIS API.  The QC results from relative
    humidity will apply to any of the calculated variables.  As with the virtual 
    temperature conversion mentioned above, the specific humidity conversion uses 
    pressure calculated from the heights.  Also note that absolute humidity is 
    sometimes referred to as "vapor density", these are in fact the same quantity.

4.  The true vertical coordinate is height.  If the user selects pressure as the 
    vertical coordinate, the heights are converted to pressure using the U.S. 
    Standard Atmosphere calculation.

* The radiometer data are only available with the FSL database.

