MADIS Radiometer Variables - Numeric

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Code       Name                                Units      Max     Notes      Max Number   Database
                                                       QC Level               of Levels  FSL  AWIPS*
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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
          -----      -------
            0        Unspecified
            1        Radiometrics WVR-1100
            2        Radiometrics WVP-1500
            3        Radiometrics TP-2500
            4        Radiometrics TP/WVP-3000
            5        Radiometrics TP/WVP-3001
            6        Radiometrics TP/WVP-3002
            7        Radiometrics TP/WVP-3005
            8        Radiometrics TP/WVP-3006
   

   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.