Data description

Data base: DillinghamMag.xyz

Column Header           Column Description
=============           ==================
Line			Line number
GHead_deg		Flight Line direction in degrees from North
Lon_NAD27		Longitude, NAD-27
Lat_NAD27		Latitude, NAD-27
x_NAD27		        UTM 4N X (meters), NAD-27
y_NAD27		        UTM 4N Y (meters), NAD-27
RECS_		        Fiducial 
date			Year and Julian date
time			Time of date (UTC)
Galt_m		        GPS Height (meters)
Raltmf			Height above ground (radar altimeter) (meters)
Baro_m		        Barometric altitude (meters)
var_dil		        Diurnal collected on base station in Dillingham, offset 53909.08 nT                     
var_kol		        Diurnal collected on base station in Koliganak, offset 54090.17 nT
mag			Raw compensated Total Magnetic Intensity (TMI) in nT
magvd		        TMI corrected for diurnal (Dillingham) (nT)
mgvdl12		        TMI corrected for diurnal (Dillingham) and lag (1.2s) (nT)
maglev		        TMI - after conventional leveling applied (nT)
IGRF			IGRF - model 2000 (nT) 
Maglev_IGRF	        TMI leveled - IGRF removed (nT) 
TMI_IGRF		Micro-leveled TMI