USGS Open-File Report 2006-1327

Data are compressed (zipped).

Line data in the file named lbv_linedata_xyz.zip are archived in ASCII xyz format,
described as follows:

LINE - Line Number
DLon - WGS84 Longitude (decimal degrees)
DLat - WGS84 Latitude  (decimal degrees)
X - NAD27 Easting, UTM Zone 13  (m)
Y - NAD27 Northing, UTM Zone 13  (m)
X_84 - WGS84 Easting, UTM Zone 13 (m)
Y_84 - WGS84 Northing, UTM Zone 13 (m)
fiducial - counter
DATE - Date YYYY/MM/DD
Time_HMS - GMT Time  (hh:mm:ss.ss)
Ralt1A_Lag - Lagged Radar Altimeter (m)
BALT - Barometric Altimeter (m)
DGPSZ - GPS Altitude (m a.s.l.)
BaseMag1 - Diurnal from BaseMag 1 (nT)
MBc_Lag - Lagged, Compensated Tail Magnetometer (nT)
MBc_DC1 - Diurnally Corrected Magnetics (nT)
MBc_DC1_resid - Diurnally Corrected Magnetics, IGRF 2000 removed (nT)
Mag_Lev - Leveled Magnetics (nT)
Mag_Lev_resid - Leveled Magnetics, IGRF 2000 Removed (nT)
      
Line data in the file named lbv_linedata_gdb.zip are archived in Geosoft 
data base archive format.  The following channels were delivered by
the contractor as described in their report (Appendix 1).

BALT 		      BAROMETRIC ALTIMETER
BaseMag1		DIURNAL BASE MAGNETIC FIELD 1, DE-SPIKED, FILTERED
BaseMag2		DIURNAL BASE MAGNETIC FIELD 2, DE-SPIKED, FILTERED
DATE			CALENDAR DATE
DLat			DIFFERENTIALLY CORRECTED GPS LATITUDE
DLon			DIFFERENTIALLY CORRECTED GPS LONGITUDE
Fiducial		LINE FIDUCIAL COUNTER
GHoriz		TOTAL HORIZONTAL GRADIENT (SUM OF SQUARES)
GTIME			GPS TIME
GXc			LATERAL GRADIENT, COMPENSATED
GXc_Lag		LATERAL GRADIENT, LAGGED
GXn			LATERAL GRADIENT, NORMALIZED
GXu			LATERAL GRADIENT, UNCOMPENSATED
GYc			LONGITUDINAL GRADIENT, COMPENSATED
GYc_Lag		LONGITUDINAL GRADIENT, LAGGED
GYn			LONGITUDINAL GRADIENT, NORMALIZED
GYu			LONGITUDINAL GRADIENT, UNCOMPENSATED
GZ_hp			VERTICAL GRADIENT
GZc			VERTICAL GRADIENT, COMPENSATED
GZc_Lag		VERTICAL GRADIENT, LAGGED
GZn			VERTICAL GRADIENT, NORMALIZED
GZu			VERTICAL GRADIENT, UNCOMPENSATED
IGRF			INTERNATION GEOMAGNETIC REFERENCE FIELD 2000, UPDATED
Line			LINE NUMBER
Lat_27		LATITUDE, NAD27
Lon_27		LONGITUDE, NAD27 
Mag_Lev		TIE LINE LEVELED TOTAL FIELD
Mag_Lev_Resid	TIE LINE LEVELED TOTAL FIELD, IGRF REMOVED
MBc			LOWER TAIL MAG, COMPENSATED
MBc_D4		LOWER TAIL MAG, 4TH DIFF NOISE
MBc_DC1		LOWER TAIL MAG, COMPENSATED, DIURNAL 1 CORRECTED
MBc_DC1_resid	LOWER TAIL MAG, COMPENSATED, DIURNAL 1 CORRECTED, IGRF rem.
MBc_DC2		LOWER TAIL MAG, COMPENSATED, DIURNAL 2 CORRECTED
MBc_Lag		LOWER TAIL MAG, COMPENSATED, LAGGED
MBu			LOWER TAIL MAG, UNCOMPENSATED
MLc			LEFT WING MAG, COMPENSATED
MLc_D4		LEFT WING MAG, 4TH DIFF NOISE
MLc_Lag		LEFT WING MAG, COMPENSATED, LAGGED
MLu			LEFT WING MAG, UNCOMPENSATED
MRc			RIGHT WING MAG, COMPENSATED
MRc_D4		RIGHT WING MAG, 4TH DIFF NOISE
MRc_Lag		RIGHT WING MAG, COMPENSATED, LAGGED
MRu			RIGHT WING MAG, UNCOMPENSATED
ONLINE		IN / OUT GRID LOGICAL FLAG
RadarTopo		RADAR ALTIMETER / GPS DERIVED TOPOGRAPHIC ALTITUDE
RALT1A		RADAR ALTIMETER NUMBER 1, ANALOG INPUT
RAlt1A_Lag		RAD ALT 1, LAGGED
RALT2			RADAR ALTIMETER NUMBER 2
RAlt2_Lag		RAD ALT 2, LAGGED
Time_HMS		Time in hours, minutes, seconds
Velocity		AIRCRAFT VELOCITY IN M/S
X			X CHANNEL IN USE
X_27			NAD 27 E, UTM Zone 13
X_84			WGS 84 E, UTM Zone 13
Y			Y CHANNEL IN USE
Y_27			NAD 27 N, UTM Zone 13
Y_84			WGS 84 N, UTM Zone 13