hhmmss sLLLL sNNNNN PPPP.P GGGGG XXXX.X sTTT sddd wwwSSS MMM KKK ppp FF WXWXA

hhmmss: Observation time, in hours, minutes and seconds (UTC). The observation time is the midpoint of the 30-s averaging interval used for the record. 
s: Sign of the latitude, longitude, temperature or dew point (+ or -).
sLLLL: The latitude of the aircraft at the observation time in degrees (LL) and minutes (LL).
sNNNN: The longitude of the aircraft at the observation time, in degrees (NNN) and minutes (NN).
PPPP.P: Aircraft static air pressure, in tenths of mb
GGGGG: Aircraft geopotential height, in meters, at the observation time. //// indicates missing value. 
XXXX.X: Extrapolated surface pressure or D-value (30-s average). Encoded as extrapolated surface pressure if aircraft static pressure is 550.0 mb or greater (i.e., flight altitudes at or below 550 mb). Format for extrapolated surface pressure is the same as for static pressure. For flight altitudes higher than 550 mb, XXXX is encoded as the D-value, in meters. Negative D-values are encoded by adding 5000 to the absolute value of the D-value. /// indicates missing value. 
sTTT: The air temperature in degrees and tenths Celsius, decimal omitted (30-s average). //// indicates missing value.
sddd: The dew point temperature, in degrees and tenths Celsius, decimal omitted (30-s average). //// indicates missing value. 
www: Flight level wind direction in degrees (30-s average). North winds are coded as 000. /// indicates missing value. 
SSS: Flight level wind speed, in kt (30-s average). /// indicates missing value. 
MMM: Peak 10-second average flight level wind speed occurring within the encoding interval, in kt. /// indicates missing value. 
KKK: Peak 10-second average surface wind speed occurring within the encoding interval from the Stepped Frequency Microwave Radiometer (SFMR), in kt. /// indicates missing value. 
ppp: SFMR-derived rain rate, in mm hr-1, evaluated over the 10-s interval chosen for KKK. /// indicates missing value. 
FF: Quality control flags. First column indicates status of positional variables as follows: 0 All parameters of nominal accuracy, 1 Lat/lon questionable, 2 Geopotential altitude or static pressure questionable, 3 Both lat/lon and GA/PS questionable. Second column indicates status of meteorological variables as follows: 0 All parameters of nominal accuracy, 1 T or TD questionable, 2 Flight-level winds questionable, 3 SFMR parameter(s) questionable, 4 T/TD and FL winds questionable, 5 T/TD and SFMR questionable, 6 FL winds and SFMR questionable, 9 T/TD, FL winds, and SFMR questionable 
WXWXA: Mission ID

****** HRD HDOB format is a slightly modified version of the operationally sent HDOBs documented in the NHOP ******
****** HRD Contact: Heather Holbach (heather.holbach@noaa.gov) ******