COMM Kevron Geophysics Pty. Ltd. COMM --------------------------- COMM COMM GRIDDED DATA: COMM ------------- COMM Area : WTRMP Area A COMM Company Flown by: Kevron Geophysics Pty. Ltd. COMM Company Flown for: Tasmanian DIER COMM Company Processed: Kevron Geophysics Pty. Ltd. COMM COMM AIRBORNE SURVEY EQUIPMENT: COMM -------------------------- COMM Aircraft Rockwell Aerocommander 500S VH-KAC COMM Magnetometer Scintrex CS-2 Cesium Vapour COMM Magnetometer Resolution 0.001 nT COMM Magnetometer Compensation RMS AADC operating in real time COMM Magnetometer Sample Interval 0.1 seconds (approx 7.0 metres) COMM Data Acquisition RMS DAS-8 COMM Data Recording Hard Disk COMM Spectrometer Exploranium GR820 COMM Crystal Size 33.6lt downward array COMM Spectrometer Sample Interval 1.0 Seconds (approx 70 metres) COMM GPS Navigation System Ashtech XII GPS Receiver COMM COMM AIRBORNE SURVEY SPECIFICATIONS: COMM ------------------------------- COMM Flight Line Direction : 090 - 270 degrees COMM Flight Line Separation : 200 metres COMM Tie Line Direction : 000 - 180 degrees COMM Tie Line Separation : 2000 metres COMM Terrain Clearance : 80 metres (MTC) COMM COMM Survey flown : January 2001 COMM Kevron Geophysics job number : 1585 COMM COMM COMM COMM Data are in UTM Grid Zone 55 COMM COMM COMM GPS navigation data differentially corrected real time COMM using Fugro Omnistar. COMM COMM Boundary Co-ords COMM COMM 234500,5615100 COMM 240000,5615100 COMM 253000,5606300 COMM 256000,5576100 COMM 256000,5570100 COMM 254000,5562900 COMM 238000,5548100 COMM 235000,5548100 COMM 231000,5560000 COMM 228000,5575100 COMM 228000,5599100 COMM 234500,5615100 COMM COMM MAGNETIC CORRECTIONS: COMM -------------------- COMM Diurnal variations removed. COMM IGRF (2000) updated to 2001.05 removed. COMM COMM ELEVATION DATA: COMM --------------- COMM Elevation was calculated by subtraction of the radar altimetre from the gps height. COMM Tie line and micro levelling has been performed. COMM AUSGEOID 98 nval geoid elipsoid separation values subtracted to achieve AHD. COMM COMM COMMRADIOMETRIC CORRECTIONS AND COEFFICIENTS: COMM---------------------------------------- COMMData has been corrected for aircraft and cosmic backgrounds. COMMHeight corrected to a constant datum of 80 metres, COMMminimum height of 30 and a maximium of 300 metres. COMMData has also been corrected for radon using Minty's (1996 -Alt Method B) COMMand corrected for channel interaction. COMM COMMRAW CHANNELS REFERED TO IN DFN FILE HAVE BEEN DEAD TIME CORRECTED AND ENERGY CALIBRATED COMM COMMRAW_TOTAL_COUNT = DEAD TIME CORRECTED TOTAL COUNT COMMRAW_POTASSIUM = DEAD TIME CORRECTED POTASSIUM COMMRAW_URANIUM = DEAD TIME CORRECTED URANIUM COMMRAW_THORIUM = DEAD TIME CORRECTED THORIUM COMM COMM COMM COMMAIRCRAFT CALIBRATION COEFFICIENTS: COMM COMM COMM Tot.Count Potassium Uranium Thorium COMMArcft Bkg 38.32 5.31 1.15 0.52 COMMCosmic Bkg 0.785 0.04366 0.03613 0.0441 COMMHeight Attn -0.006906 -0.008726 -0.007199 -0.006774 COMM COMMSTRIPPING RATIOS: COMM---------------- COMM ALPHA 0.270648 COMM BETA 0.455881 COMM GAMMA 0.855276 COMM A 0.094817 COMM B 0.012177 COMM G 0.021550 COMM COMM COMM COMMSENSITIVITIES 80 metres (counts / unit concentration): COMM------------------------------------------------------- COMM COMM Potassium 108.85 COMM Uranium 7.75 COMM Thorium 5.44 COMM Total Count 26.34 COMM--------------------------------------------------------------------- COMM COMM COMM LOCATED DATA FOR RADIOMETRICS IN ASCII FORMAT - 1.0 second COMM --------------------------------------------------------------------- COMM COMM Logical Record Length: 335 bytes COMM Number fields: 31 COMM Name: field width format-C SUSstring COMM LineName [ 1] 12 %12.12s '-' COMM LineDate [ 2] 8 %8.8s '-' COMM fiducial [ 3] 11 %10.0f ' -9999999' COMM flight number [ 4] 5 %4.0f ' -999' COMM time hh dddd [ 5] 10 %9.5f ' -9999999.' COMM agd66 easting [ 6] 11 %10.2f ' -9999999.0' COMM agd66 northing [ 7] 11 %10.2f ' -9999999.0' COMM gda mga55 easting [ 8] 11 %10.2lf ' -9999999.0' COMM gda mga55 northing [ 9] 11 %10.2lf ' -9999999.0' COMM agd66 long [ 10] 13 %12.7lf ' -9999999.000' COMM agd66 lat [ 11] 13 %12.7lf ' -9999999.000' COMM wgs84 long [ 12] 13 %12.7lf ' -9999999.000' COMM wgs84 lat [ 13] 13 %12.7lf ' -9999999.000' COMM magnetics [ 14] 11 %10.3f ' -9999999.0' COMM deadtime corrected cosmic [ 15] 13 %12.3f ' -9999999.000' COMM deadtime corrected potassium [ 16] 13 %12.3f ' -9999999.000' COMM deadtime corrected uranium [ 17] 13 %12.3f ' -9999999.000' COMM deadtime corrected thorium [ 18] 13 %12.3f ' -9999999.000' COMM deadtime corrected total count [ 19] 13 %12.3f ' -9999999.000' COMM final potassium percent [ 20] 13 %12.3f ' -9999999.000' COMM final uranium ppm [ 21] 13 %12.3f ' -9999999.000' COMM final thorium ppm [ 22] 13 %12.3f ' -9999999.000' COMM final total count nGh [ 23] 13 %12.3f ' -9999999.000' COMM air_pressure [ 24] 8 %7.2f ' -999999' COMM temp degrees [ 25] 8 %7.2f ' -999999' COMM humid [ 26] 8 %7.2f ' -999999' COMM stp height [ 27] 8 %7.2f ' -999999' COMM rad alt [ 28] 8 %7.2f ' -999999' COMM baro alt [ 29] 8 %7.2f ' -999999' COMM gps height [ 30] 8 %7.2f ' -999999' COMM elevation [ 31] 8 %7.2f ' -999999' COMM COMM COMM COMM COMMDATA RANGE: COMM----------- COMM COMMTraverse Lines 10011 - 13370 COMMTie Lines 90010 - 90150 COMM(complete survey area) COMM COMM COMM COMM COMM COMM