GENERAL Project 2273 Survey area Heemskirk, NW Tasmania Located data type 1 Second Radiometric Data Surveyed by GPX AIRBORNE PTY LTD. Job number 2273 Processed by GPX AIRBORNE PTY LTD. Creation date March 2007 SURVEY SPECIFICATIONS Survey flown February 2007 Traverse line spacing 50 metres Traverse line direction 090-270 degrees Tie line spacing 500 metres Tie line direction 000-180 degrees Survey height 80 metres LOCATED DATA FORMAT Variable Units Undefined From To Format Line number 9999999 1 8 I8 Easting (Transverse Mercator) metres 9999999.99 9 19 F11.2 Northing (Transverse Mercator)metres 9999999.99 20 30 F11.2 Fiducial 99999.99 31 39 F9.2 Flight number 999 40 43 I4 Direction (1=E, 2=N, 3=W, 4=S) 9 44 45 I2 Date (YYYYMMDD) 99999999 46 54 I9 Time (GPS) seconds 99999.99 55 63 F9.2 Longitude (WGS84) degrees 999.999999 64 74 F11.6 Latitude (WGS84) degrees 999.999999 75 85 F11.6 Radar altimeter metres 9999.9 86 92 F7.1 Pressure millibars 9999.9 93 99 F7.1 Temperature degrees C 99.9 100 104 F5.1 Raw total count cps 999999 105 111 F7.0 Raw potassium cps 9999 112 116 F5.0 Raw uranium cps 9999 117 121 F5.0 Raw thorium cps 9999 122 126 F5.0 Raw cosmic cps 99999.9 127 131 F5.0 Final total count cps 99999.99 132 140 F9.2 Final potassium cps 99999.99 141 149 F9.2 Final uranium cps 99999.99 150 158 F9.2 Final thorium cps 99999.99 159 167 F9.2 Raw 256 channel data cps 999 168 1191 I4 Energy calibrated 256 channel cps 9999.9 1192 2983 F7.1 DATA PROCESSING COORDINATE DATA All lines are scissored to the following rules: 1) A 'smooth' edge outside the area boundary. 2) Maximum line overlap of 0 fiducials within the area boundary. The local projection is a UTM projection based on the WGS84 spheroid with a central meridian of 147 East degrees. System parallax of 0.6 fiducial has been removed. RADIOMETRIC DATA NASVD has been applied to channel data prior to windowing System parallax of 0.0 fiducial has been removed. Height attenuated to 80m AGL Airborne radon has been removed AIRCRAFT BACKGROUND UNITS Total Count 81.67 cps Potassium 23.35 cps Uranium 0.59 cps Thorium 0.67 cps COSMIC STRIPPING RATIOS Total Count 0.811201 Potassium 0.044663 Uranium 0.038646 Thorium 0.043791 COMPTON STRIPPING RATIOS alpha 0.250 beta 0.400 gamma 0.810 a 0.060 HEIGHT ATTENUATION COEFFICIENT Total Count 0.006928 per metre Potassium 0.009043 per metre Uranium 0.007186 per metre Thorium 0.006892 per metre WINDOW ENERGY LEVELS Low Energy High Energy Total Count 410.0 2810.0 keV Potassium 1370.0 1570.0 keV Uranium 1660.0 1860.0 keV Thorium 2410.0 2810.0 keV