COMMGENERAL
COMM
COMMProject                       GEOSCIENCE AUSTRALIA MAG/SPEC SURVEY
COMMSurvey area                   NORTH EAST TASMANIA
COMMLocated data type             1 Second FINAL RADIOEMTRIC Data
COMM
COMMSurveyed by                   GPX AIRBORNE PTY LTD.
COMMJob number                    2249
COMMProcessed by                  GPX AIRBORNE PTY LTD.
COMMCreation date                 November 2007
COMM
COMMSURVEY SPECIFICATIONS
COMM
COMMSurvey flown                  March - September 2007
COMMTraverse line spacing         200 metres
COMMTraverse line direction       090-270 degrees
COMMTie line spacing              2000 metres
COMMTie line direction            000-180 degrees
COMM
COMMSurvey height                 90 metres
COMM
COMMLOCATED DATA FORMAT
COMM
COMMVariable                      Units          Undefined      From  To    Format
COMM
COMMProject number                               9999           1     5     I5
COMMLine number                                  9999999        6     13    I8
COMMEasting (MGA55)               metres         9999999.99     14    24    F11.2
COMMNorthing (MGA55)              metres         9999999.99     25    35    F11.2
COMMFiducial                                     99999999       36    44    F9.0
COMMFlight number                                999            45    48    I4
COMMDate (YYYYMMDD)                              99999999       49    57    I9
COMMLongitude (GDA94)             degrees        999.999999     58    68    F11.6
COMMLatitude (GDA94)              degrees        999.999999     69    79    F11.6
COMMBearing                       degrees        999            80    83    F4.0
COMMRadar altimeter               metres         9999.9         84    90    F7.1
COMMPressure                      millibars      9999.9         91    97    F7.1
COMMTemperature                   degrees C      99.9           98    102   F5.1
COMMFinal dose rate smoothed      nGy/hr         999.999        103   110   F8.3
COMMFinal potassium smoothed      %              99.999         111   117   F7.3
COMMFinal uranium smoothed        ppm            99.999         118   124   F7.3
COMMFinal thorium smoothed        ppm            999.999        125   132   F8.3
COMMFinal total count not smoothednGy/hr         999.999        133   141   F9.3
COMMFinal potassium not smoothed  %              99.999         142   148   F7.3
COMMFinal uranium not smoothed    ppm            99.999         149   155   F7.3
COMMFinal thorium not smoothed    ppm            999.999        156   163   F8.3
COMM
COMMDATA PROCESSING
COMM
COMMCOORDINATE DATA
COMMAll lines are scissored to the following rules:
COMM1) A 'smooth' edge outside the area boundary.
COMM2) Maximum line overlap of 0 fiducials within
COMMthe area boundary.
COMM
COMMThe local projection is a UTM projection based on the
COMMGDA94 spheroid with a central meridian of 147 East degrees.
COMMSystem parallax of 0.6 fiducial has been removed.
COMM
COMMRADIOMETRIC DATA
COMM
COMMRaw channel data provided has been energy calibrated
COMMNASVD has been applied to channel data prior to windowing
COMMSystem parallax of 0.0 fiducial has been removed.
COMMHeight attenuated to 90m AGL
COMMAirborne radon has been removed
COMM
COMMAIRCRAFT BACKGROUND                                UNITS
COMMTotal Count                           81.67          cps
COMMPotassium                             23.35          cps
COMMUranium                                0.59          cps
COMMThorium                                0.67          cps
COMMCOSMIC STRIPPING RATIOS
COMMTotal Count                        0.811201
COMMPotassium                          0.044663
COMMUranium                            0.038646
COMMThorium                            0.043791
COMMCOMPTON STRIPPING RATIOS
COMMalpha                                 0.250
COMMbeta                                  0.400
COMMgamma                                 0.810
COMMa                                     0.060
COMMHEIGHT ATTENUATION COEFFICIENT
COMMTotal Count                        0.006928    per metre
COMMPotassium                          0.009043    per metre
COMMUranium                            0.007186    per metre
COMMThorium                            0.006892    per metre
COMMSENSITIVITY CONSTANTS
COMMTotal Count - nGy/hr              31.243915          cps
COMMPotassium - 1%                   113.982381          cps
COMMUranium - 1ppm                    10.549335          cps
COMMThorium - 1ppm                     6.479314          cps
COMMWINDOW ENERGY LEVELS             Low Energy High Energy
COMMTotal Count                           410.0      2810.0          keV
COMMPotassium                            1370.0      1570.0          keV
COMMUranium                              1660.0      1860.0          keV
COMMThorium                              2410.0      2810.0          keV
