GENERAL                       

Project                       2313
Survey area                   Beaconsfield
Located data type             1 Second Radiometric Data

Surveyed by                   GPX AIRBORNE PTY LTD.
Job number                    2313
Processed by                  GPX AIRBORNE PTY LTD.
Creation date                 October 2007

SURVEY SPECIFICATIONS         

Survey flown                  September 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                 50 metres

LOCATED DATA FORMAT           

Variable                      Units          Undefined      Format    

Line number                                  9999999        I8        
Easting (GDA94 MGA55)         metres         9999999.99     F11.2     
Northing (GDA94 MGA55)        metres         9999999.99     F11.2     
Fiducial                                     99999.99       F9.2      
Flight number                                999            I4        
Direction (1=E, 2=N, 3=W, 4=S)               9              I2        
Date (YYYYMMDD)                              99999999       I9        
Time (GPS)                    seconds        99999.99       F9.2      
Longitude (GDA94)             degrees        999.999999     F11.6     
Latitude (GDA94)              degrees        999.999999     F11.6     
Easting (AGD66 AMG55)         metres         9999999.99     F11.2     
Northing (AGD66 AMG55)        metres         9999999.99     F11.2   
Radar altimeter               metres         9999.9         F7.1      
Pressure                      millibars      9999.9         F7.1      
Temperature                   degrees C      99.9           F5.1      
Raw total count               cps            999999         F7.0      
Raw potassium                 cps            9999           F5.0      
Raw uranium                   cps            9999           F5.0      
Raw thorium                   cps            9999           F5.0      
Raw cosmic                    cps            99999.9        F5.0      
Final total count             cps            99999.99       F9.2      
Final potassium               cps            99999.99       F9.2      
Final uranium                 cps            99999.99       F9.2      
Final thorium                 cps            99999.99       F9.2      
Raw 256 channel data          cps            999            I4        
Energy calibrated 256 channel cps            9999.9         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 50m 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                                0.2540             
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
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

