GENERAL                       

Project                       Ben Lomond
Survey area                   Ben Lomond
Located data type             1 Second Radiometric Data

Surveyed by                   GPX AIRBORNE PTY LTD.
Job number                    2310
Processed by                  GPX AIRBORNE PTY LTD.
Creation date                 November 2007

SURVEY SPECIFICATIONS         

Survey flown                  March - September 2007
Traverse line spacing         200 metres
Traverse line direction       090-270 degrees
Tie line spacing              2000 metres
Tie line direction            000-180 degrees

Survey height                 90 metres

LOCATED DATA FORMAT           

Variable                      Units          Undefined      From  To    Format    

Line number                                  9999999        1     8     I8        
Easting (MGA55)               metres         9999999.99     9     19    F11.2     
Northing (MGA55)              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 (GDA94)             degrees        999.999999     64    74    F11.6     
Latitude (GDA94)              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 dose rate               nGy/h          99999.99999    132   143   F12.5     
Final potassium               percent        99999.99999    144   155   F12.5     
Final uranium                 eppm           99999.99999    156   167   F12.5     
Final thorium                 eppm           99999.99999    168   179   F12.5     
Raw 256 channel data          cps            999            180   1203  I4        
Energy calibrated 256 channel cps            9999.9         1204  2995  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                      
GDA94 spheroid with a central meridian of 147 East degrees.                
System parallax of 2.5 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 90m AGL                                               
Airborne radon has been removed                                            

AIRCRAFT BACKGROUND                                UNITS
Total Count                           68.07          cps
Potassium                              8.74          cps
Uranium                                2.32          cps
Thorium                                1.43          cps
COSMIC STRIPPING RATIOS       
Total Count                        0.809713             
Potassium                          0.066459             
Uranium                            0.033387             
Thorium                            0.046899             
COMPTON STRIPPING RATIOS      
alpha                                0.2540             
beta                                 0.5145             
gamma                                0.7997             
a                                    0.0692             
HEIGHT ATTENUATION COEFFICIENT
Total Count                        0.009414    per metre
Potassium                          0.012094    per metre
Uranium                            0.009558    per metre
Thorium                            0.009178    per metre
SENSITIVITY CONSTANTS         
Total Count - nGy/h                   18.95          cps
Potassium - 1%                        57.26          cps
Uranium - 1ppm                         5.43          cps
Thorium - 1ppm                         3.97          cps
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

