USGS Open-File Report 2011-1165

Data are compressed (zipped).
Line data are archived in ASCII xyz format, described as follows:

Format     Description                Units

I6        line number                number
I8        heading	             degrees
F11.5     Latitude (WGS84)           decimal degrees
F11.5 	  Longitude (WGS84)          decimal degrees
F11.5     Latitude (NAD27)           decimal degrees
F11.5     Longitude (NAD27)          decimal degrees
F12.2     UTM X (WGS84)              meters
F12.2	  UTM Y (WGS84)		     meters
F12.2	  UTM X (NAD27)		     meters
F12.2	  UTM Y (NAD27)		     meters
I7	  fiducial		     number
F13.2     UTC time		     HH:MM:SS.S
F10.2     GPS ellipsoid height	     meters
		helicopter
F10.2 	  Pre-planned drape 	     meters
		surface
F10.2     GPS ellipsoid height	     meters
		bird (sensor)
F10.2 	  Radar altimeter (bird)     meters
F10.2	  Calculated topography	     meters
F10.2 	  Base station magnetics     nT
F10.2 	  Raw magnetics		     nT
F10.2 	  Diurnally corrected        nT
		magnetics (base
		station corrected)	
F10.2 	  DC (static)-levelled       nT
		and diurnally 
		corrected magnetics     
F10.2     Micro-leveled and	     nT
		diurnally corrected
		magnetics
F10.2 	  Calculated IGRF,	     nT
		2010 model
		(International
		Geomagnetic
		Reference Field)
F10.2	  Final magnetics	     nT
F10.2	  Final magnetics, residual  nT
		lag corrected

     
SAMPLE DATA:
10      269    36.73517    -106.00346    36.73512  -106.00335     410364.80     4065961.05      410455.68     4065758.14      93851   2010/279    22:38:05.1           2663.90      2668.20        2640.80      96.40    2544.40   50389.71   50897.93     50884.21             50890.95          50891.09         51040.59     -149.50         -150.08 
10      269    36.73517    -106.00351    36.73512  -106.00340     410360.61     4065960.85      410451.49     4065757.94      93852   2010/279    22:38:05.2           2664.00      2668.20        2640.80      96.30    2544.60   50389.70   50897.85     50884.13             50890.87          50891.04         51040.58     -149.54         -150.27 
10      269    36.73516    -106.00356    36.73512  -106.00344     410356.41     4065960.65      410447.29     4065757.74      93853   2010/279    22:38:05.3           2664.10      2668.30        2640.90      96.20    2544.70   50389.69   50897.74     50884.02             50890.76          50890.96         51040.57     -149.61         -150.46