USGS Open-File Report 2006-

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

Columns	      Description				
--------------    ----------------
	
 line			line number                           
 fltdir		flight direction deg from north       
 longitude		WGS84 longitude, degrees                                
 latitude		WGS84 latitude, degrees                              
 X			WGS84 x-direction, meters, UTM zone 13N                               
 Y			WGS84 y-direction, meters, UTM zone 13N                                
 nad27_x		NAD27 x-direction, meters, UTM zone 13N                              
 nad27_y		NAD27 y-direction, meters, UTM zone 13N                                                                   
 date			year.julian date                                 
 GPStime		time                                  
 balt			baropressure, in mbars                 
 galt			gps altimeter, in meters                               
 raltl_trim		radar altitude in feet, adjusted for instrument lag
 ralt_sm		ralt_trim, smoothed using a 50-pt running-average filter.                
 bmagf			base station magnetometer reading (diurnal), in nT        
 airmag		raw magnetometer reading, in nT                            
 magd			diurnal corrected magnetometer reading, in nT              
 magdh			heading- and level-corrected magnetometer reading, in nT    
 igrf			IGRF 2000 value, in nT
 resmag_int		Residual magnetometer reading, in nT, interpolated at 
				barometric altitude recording times
 miclev		resmag_int, microlevelled (see report).
 resmag_final		resmag_int, microlevelled and filtered at 62 
				problematic lines (only in qsp data set; see report).
      
SAMPLE DATA:
Line  1
    1.00      90.00 -105.95918  36.02184  413574.21  3986796.39  413623.77  3986589.93  2005.93  15:16:58.94  * 2037.00  440.05  440.05  50704.58        *         *         *   51288.75  -238.76  -238.31 
    1.00      90.00 -105.95915  36.02184  413576.78  3986796.31  413626.34  3986589.84  2005.93  15:16:59.00  * 2037.10  440.83  440.79  50704.58  51057.07  51052.50  51050.00  51288.73  -238.73  -238.28 
    1.00      90.00 -105.95910  36.02184  413580.88  3986796.13  413630.44  3986589.67  2005.93  15:16:59.10  * 2037.20  441.50  441.36  50704.57  51057.08  51052.50  51050.00  51288.74  -238.74  -238.29