USAFR C-130 'J' data files

The United States Air Force Reserve 53rd WRS records flight level parameters at one second intervals during reconnaissance missions into tropical disturbances. Each month an Air Force Quality Control officer will review all of the data collected during the previous month, and produce reduced ten second files for each flight. However, sometimes this data is retained at the one second interval.
These files are in ASCII. They consist of several header lines identifying the mission ID, start time and date for the data, software and file version numbers, and tail number of the aircraft in use. This is followed by a text line conatining headers identifying the parameter recorded in each column. Below is listing of those headers along with a full parameter name and the units that the data was recorded in.

USAF data headers
Current

Header	Description	Units
GMT Time	Time of Day (UTC)	Hours:Minutes:Seconds
ADR	Air Density Ratio	none
AOA	Angle of Attack	degrees
BCA	Baor-Corrected Altitude	millibars
BSP	Baroset Pressure	millibars
CAS	Calibrated Air Speed	knots
CSP	Corrected Static Pressure	millibars
DPR	Dynamic Pressure	millibars
GPSA	GPS Altimeter	meters
GS	Ground Speed	knots
IA	Inertial Altimeter	meters
ISP	Inertial Static Pressure	millibars
LAT	Latitude	degrees
LON	Longitude	degrees
PA	Pressure Altitude	meters
PITCH	Pitch angle	degrees
PR	Pressure Ratio	none
PT	Total Pressure	millibars
RA	Radar Altitude	meters
ROLL	Roll angle	degrees
SS	Side Slip	degrees
TA	Corrected Static Air Temperature	°C
TAS	True Air Speed	knots
THD	True Heading	degrees
TRK	Track	degrees
TT	Total Temperature	°C
VE	Velocity East	knots
VN	Velocity North	knots
VV	Vertical Velocity	knots
WDIR	Wind Direction	degrees
WSPD	Wind Speed	knots
TD	Dew Point Temperature - Digital	°C
RR	Rain Rate (SFMR)	mm/hr
SWS	Surface Wind Speed (SFMR)	knots
CC	Course Correction	degrees
DVAL	Deviation Value	meters
GA	Geopotential Altitude	meters
HSS	Height of Standard Surface	meters
SLP	Sea Level Pressure	millibars
WD	Wind Direction (calculated)	degrees
WS	Wind Speed (calculated)	knots
Valid Flags	Parameter validity flags	binary
Source Tags	Data Source Tags	hexidecimal
SATCOM	Satellite Communications status	binary
ARC210	Motorola ARC-210 Radio status	binary
AD	Analog/Digital Card status	binary
DDPH	Digital Dew Point Hygrometer status	binary
1553	Main aircraft data bus	digital
SFMR	Stepped Frequency Microwave Radiometer output	hexidecimal

The order of the parameters has varied over the years. Not all parameters listed above are available in previous versions. In addition some parameters are listed in pervious versions which are not longer available and they are listed below.

USAF data headers
Previous

TDA	Dew Point Temperature - Analog	°C
TDD	Dew Point Temperature - Digital	°C

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