 

                            
=====================================================================

Project: 		TASMANIA 2001

Survey name: 		Area C - Western Tasmania.
			Area E - D'Aguilar Range.

=====================================================================

		
Co-ordinates of the vertices of Area C.

	Projection: TMAMG55,
	Datum AGD66
   mE          mN
360000.0    5440000.0
360000.0    5450000.0
389000.0    5450000.0
389000.0    5430000.0
421000.0    5430000.0
421000.0    5420000.0
445000.0    5420000.0
445000.0    5390000.0
416000.0    5390000.0
416000.0    5397000.0
410000.0    5397000.0
410000.0    5392000.0
398000.0    5388000.0
398000.0    5385600.0
407000.0    5384600.0
405000.0    5373600.0
397000.0    5368000.0
390000.0    5368000.0
393500.0    5349000.0
403000.0    5347000.0
399000.0    5336000.0
395000.0    5336000.0
395000.0    5325000.0
388000.0    5325000.0
388000.0    5310000.0
380000.0    5310000.0
380000.0    5314000.0
374000.0    5315091.0
374000.0    5340000.0
353787.0    5340000.0
353500.0    5345000.0
335500.0    5369000.0
329000.0    5380000.0
351500.0    5380000.0
351500.0    5404000.0
341000.0    5410000.0
341000.0    5437000.0
338000.0    5440000.0
360000.0    5440000.0


Co-ordinates of the vertices of Area E.

	Projection: TMAMG55, 
	Datum AGD66
   mE          mN
379000.0    5292000.0
387000.0    5292000.0
393181.0    5275000.0
379000.0    5275000.0
379000.0    5292000.0

-------------------------------------------------------------------------


=========================================================================
		LOCATED DATA FILES
=========================================================================

Data type: 		Final ASCII ASEG GDF2 located data

Archive Media: 		CDs (Joliet format)
               		

DATA FILE CONTENTS:
------------------

Area C - Western Tasmania.:
----------------------------
AREA_C_MAG_Trav1.dat 		( magnetic data for lines 10011 - 11601)
AREA_C_MAG_Trav2.dat 		( magnetic data for lines 11611 - 12601)
AREA_C_MAG_Trav3.dat 		( magnetic data for lines 12611 - 14001)
AREA_C_MAG_Trav4.dat 		( magnetic data for lines 14011 - 15401)
AREA_C_MAG_Trav5.dat 		( magnetic data for lines 15411 - 17371)
AREA_C_MAG_Ties.dat 		( magnetic data for tie lines)

AREA_C_RAD_Trav.dat 		( radiometric data for all lines)
AREA_C_RAD_Ties.dat		( radiometric data for tie lines)

AREA_C_RAD256_Trav1.dat 	( radiometric data for lines 10011 - 11601)
AREA_C_RAD256_Trav2.dat 	( radiometric data for lines 11611 - 12601)
AREA_C_RAD256_Trav3.dat 	( radiometric data for lines 12611 - 14001)
AREA_C_RAD256_Trav4.dat 	( radiometric data for lines 14011 - 15401)
AREA_C_RAD256_Trav5.dat 	( radiometric data for lines 15411 - 17371)
AREA_C_RAD256_Ties.dat 		( radiometric data for tie lines)   

Area E - D'Aguilar Range.                                       
----------------------------                                    
AREA_E_MAG.dat 			(magnetic data for all lines)   
AREA_E_RAD.dat 			(radiometric data for all lines)
       
AREA_E_RAD256.dat 		(radiometric 256 data for all lines)

Test Lines - complete survey.
----------------------------
TESTLINES_MAG.dat 		(magnetic data for test lines)
TESTLINES_RAD256.dat 		(radiometric 256 data for test lines)


=========================================================================
 		MAGNETIC LOCATED DATA FORMAT
=========================================================================

-------------------------------------------------------------------------
Field        Null Value  Description
-------------------------------------------------------------------------
Column  1    99999         line number          
Column  2    999           flight          
Column  3    99999999      date (YYYYMMDD)           
Column  4    9999999       julian_day  (YYYYDDD)     
Column  5    999999        fiducial            
Column  6    99.99999      time (decimal hours)          
Column  7    999999.99     AGD66 easting  (metres, TMAMG Zone 55)
Column  8    9999999.99    AGD66 northing (metres, TMAMG Zone 55)
Column  9    999999.99     GDA94 easting  (metres, MGA Zone 55)
Column 10    9999999.99    GDA94 northing (metres, MGA Zone 55)
Column 11    999.99999999  GDA94 longitude (decimal degrees, GEODETIC)
Column 12    -99.99999999  GDA94 latitude  (decimal degrees, GEODETIC)
Column 13    99999.999     Raw uncompensated magnetics (nanoTeslas)
Column 14    99999.999     Compensated magnetics (nanoTeslas)
Column 15    99999.999     Diurnal & IGRF corrected magnetics (nanoTeslas)
Column 16    99999.999     Levelled magnetics  (nanoTeslas)
Column 17    99999.999     Final magnetics microlevelled(nanoTeslas)
Column 18    999999.99     Diurnal (nanoTeslas)
Column 19    999999.99     IGRF (nanoTeslas)
Column 20    9999.9        Final digital terrain model (metres, AHD)
Column 21    9999.9        Final barometric pressure (millibars)
Column 22    9999.9        Final radar altimeter (metres) 
Column 23    9999.9        Final barometric pressure (metres)    
Column 24    9999.9        Final gps height (metres)        
Column 25    999.9         Final temperature (degrees celsius)  
Column 26    9             Data used_flag (0=unused, 1=used)


-----------------------------------------------------------------------
ASEG GDF2 .dfn FILE FOR MAGNETIC LOCATED DATA:
-----------------------------------------------------------------------
             
DEFN 1 ST=RECD,RT=;lineNumber_FINAL:I6:NULL=99999
DEFN 2 ST=RECD,RT=;FlightNumber:I4:NULL=999
DEFN 3 ST=RECD,RT=;Date_YYYYMMDD:I9:NULL=99999999
DEFN 4 ST=RECD,RT=;JulianDay_YYYYDDD:I8:NULL=9999999
DEFN 5 ST=RECD,RT=;Fiducial:I7:NULL=999999
DEFN 6 ST=RECD,RT=;Local_Time_DecHrs:F9.5:NULL=99.99999
DEFN 7 ST=RECD,RT=;AGD66TMAMG55_EAST:F10.2:NULL=999999.99
DEFN 8 ST=RECD,RT=;AGD66TMAMG55_NORTH:F11.2:NULL=9999999.99
DEFN 9 ST=RECD,RT=;GDA94MGA55_EAST:F10.2:NULL=999999.99
DEFN 10 ST=RECD,RT=;GDA94MGA55_NORTH:F11.2:NULL=9999999.99
DEFN 11 ST=RECD,RT=;GDA94GEODETIC_LAT:F13.8:NULL=999.99999999
DEFN 12 ST=RECD,RT=;GDA94GEODETIC_LONG:F13.8:NULL=-99.99999999
DEFN 13 ST=RECD,RT=;Magnetics_Raw_Uncompensated:F10.3:NULL=99999.999
DEFN 14 ST=RECD,RT=;Magnetics_Compensated:F10.3:NULL=99999.999
DEFN 15 ST=RECD,RT=;Magnetics_DiurnalIGRFCorrected:F10.3:NULL=99999.999
DEFN 16 ST=RECD,RT=;Magnetics_levelled:F10.3:NULL=99999.999
DEFN 17 ST=RECD,RT=;Magnetics_Final_microlevelled:F10.3:NULL=99999.999
DEFN 18 ST=RECD,RT=;Diurnal:F11.2:NULL=999999.99
DEFN 19 ST=RECD,RT=;IGRF:F11.2:NULL=999999.99
DEFN 20 ST=RECD,RT=;Digital_Terrain_Model_AHD_metres:F7.1:NULL=9999.9
DEFN 21 ST=RECD,RT=;Pressure_Millibars:F7.1:NULL=9999.9
DEFN 22 ST=RECD,RT=;Radar_Altimeter_metres:F7.1:NULL=9999.9
DEFN 23 ST=RECD,RT=;Barometric_Height_metres:F7.1:NULL=9999.9
DEFN 24 ST=RECD,RT=;GPS_Height_metres:F7.1:NULL=9999.9
DEFN 25 ST=RECD,RT=;Temperature_DegC:F6.1:NULL=999.9
DEFN 26 ST=RECD,RT=;Data_Used_yes1:I2:NULL=9;END DEFN


=======================================================================
		RADIOMETRIC LOCATED DATA FORMAT:
=======================================================================

-----------------------------------------------------------------------
Field        Null Value    Description
-----------------------------------------------------------------------
Column  1    99999         line number          
Column  2    999           flight          
Column  3    99999999      date (YYYYMMDD)           
Column  4    9999999       julian_day  (YYYYDDD)     
Column  5    999999        fiducial            
Column  6    99.99999      time (decimal hours)          
Column  7    999999.99     AGD66 easting  (metres, AMG Zone 55)
Column  8    9999999.99    AGD66 northing (metres, AMG Zone 55)
Column  9    999999.99     GDA94 easting  (metres, MGA Zone 55)
Column 10    9999999.99    GDA94 northing (metres, MGA Zone 55)
Column 11    999.99999999  GDA94 longitude (decimal degrees, GEODETIC)
Column 12    -99.99999999  GDA94 latitude  (decimal degrees, GEODETIC)
Column 13    99999.999     Final magnetics (nanoTeslas)
Column 14    999.99        live time (milliseconds)        
Column 15    9999          Cosmic_background (cps)           
Column 16    9999          Raw potassium (cps)              
Column 17    9999          Raw uranium (cps)                 
Column 18    9999          Raw thorium (cps)                 
Column 19    99999         Raw total count (cps)                  
Column 20    9999.999      Final Potassium_percent     
Column 21    9999.999      Final Uranium ppm           
Column 22    9999.999      Final Thorium (ppm)          
Column 23    99999.999     Final Total Count (nG/h)    
Column 24    9999.9        Final digital terrain model (metres, AHD)  
Column 25    9999.9        Final barometric pressure (metres)      
Column 26    9999.9        Final barometric pressure (millibars)          
Column 27    9999.9        Effective_STP_Height_metres   
Column 28    9999.9        Final radar altimeter (metres)        
Column 29    9999.9        Final gps height (metres)               
Column 30    999.9         Final temperature (degrees celsius)               
Column 31    9             Data used_flag (0=unused, 1=used)             
                 

-----------------------------------------------------------------------
ASEG GDF2 .dfn FILE FOR RADIOMETRIC LOCATED DATA:
-----------------------------------------------------------------------
                                                 
DEFN 1 ST=RECD,RT=;lineNumber_FINAL:I6:NULL=99999
DEFN 2 ST=RECD,RT=;FlightNumber:I4:NULL=999
DEFN 3 ST=RECD,RT=;Date_YYYYMMDD:I9:NULL=99999999
DEFN 4 ST=RECD,RT=;JulianDay_YYYYDDD:I8:NULL=9999999
DEFN 5 ST=RECD,RT=;Fiducial:I7:NULL=999999
DEFN 6 ST=RECD,RT=;Local_Time_DecHrs:F9.5:NULL=99.99999
DEFN 7 ST=RECD,RT=;AGD66TMAMG55_EAST:F10.2:NULL=999999.99
DEFN 8 ST=RECD,RT=;AGD66TMAMG55_NORTH:F11.2:NULL=9999999.99
DEFN 9 ST=RECD,RT=;GDA94MGA55_EAST:F10.2:NULL=999999.99
DEFN 10 ST=RECD,RT=;GDA94MGA55_NORTH:F11.2:NULL=9999999.99
DEFN 11 ST=RECD,RT=;GDA94GEODETIC_LAT:F13.8:NULL=999.99999999
DEFN 12 ST=RECD,RT=;GDA94GEODETIC_LONG:F13.8:NULL=-99.99999999
DEFN 13 ST=RECD,RT=;Magnetics_Final_microlevelled:F10.3:NULL=99999.999
DEFN 14 ST=RECD,RT=;live_time_milliseconds:F6.0:NULL=99999
DEFN 15 ST=RECD,RT=;Cosmic_background_cps:F5.0:NULL=9999
DEFN 16 ST=RECD,RT=;Raw_potassium_cps:F5.0:NULL=9999
DEFN 17 ST=RECD,RT=;Raw_uranium_cps:F5.0:NULL=9999
DEFN 18 ST=RECD,RT=;Raw_thorium_cps:F5.0:NULL=9999
DEFN 19 ST=RECD,RT=;Raw_total_cps:F5.0:NULL=99999
DEFN 20 ST=RECD,RT=;Final_Potassium_percent:F8.4:NULL=999.9999
DEFN 21 ST=RECD,RT=;Final_Uranium_ppm:F8.4:NULL=999.9999
DEFN 22 ST=RECD,RT=;Final_Thorium_ppm:F8.4:NULL=999.9999
DEFN 23 ST=RECD,RT=;Final_Total_Count_nGh:F9.3:NULL=99999.999
DEFN 24 ST=RECD,RT=;Digital_Terrain_Model_metres:F7.1:NULL=9999.9
DEFN 25 ST=RECD,RT=;Barometric_Height_metres:F7.1:NULL=9999.9
DEFN 26 ST=RECD,RT=;Pressure_Millibars:F7.1:NULL=9999.9
DEFN 27 ST=RECD,RT=;Effective_STP_Height_metres:F7.1:NULL=9999.9
DEFN 28 ST=RECD,RT=;Radar_Altimeter_metres:F7.1:NULL=9999.9
DEFN 29 ST=RECD,RT=;GPS_Height_metres:F7.1:NULL=9999.9
DEFN 30 ST=RECD,RT=;Temperature_DegC:F6.1:NULL=999.9
DEFN 31 ST=RECD,RT=;Data_Used_yes1:I2:NULL=9;END DEFN
 
***************************************************************************

Radiometric 256 channel Data:
=============================
Files:			2016Rad256.LDT.dat
			2016Rad256.LDT.dfn
		
Format:			ASEG GDF2 :  ASCII Columns
Null:			-999

-----------------------------------------------------------
Field     	Description
-----------------------------------------------------------
Line_Number	Line number    (1000+ for Traverses, 7000+ for Tie Lines )      
Fiducial   	Fiducial Geo Instruments system  
Time_Seconds   	Time (Decimal Hours) 
Julian   	Julian_day  (DDD, year 2000)                
  Y1       	Northing ( WGS84  metres, SUTM55)
  X1       	Easting  ( WGS84  metres, SUTM55)                
  Y2       	Northing ( GDA94 metres, MGA55)
  X2       	Easting  ( GDA94 metres, MGA55)
  Y3       	Northing ( ISG553 metres, TMAMG55)
  X3       	Easting  ( ISG553 metres, TMAMG55)
Radalt   	Radar altimeter (metres)
Baroalt    	Baroalt  (raw)
Temperature    	Temperature (deg C)
LiveTime	System livetime (milliseconds)
Cosmic		Cosmic (counts )
Potas_Raw	Potassium Raw (counts) 
Thor_Raw	Thorium Raw (counts) 
Uran_Raw	Uranium Raw (counts) 
Totalc_Raw	Total count Raw (counts) 
Potas_Corrected	Potassium Corrected (Percent)
Thor_Corrected	Thorium Corrected (PPM) 
Uran_Corrected	Uranium Corrected (PPM) 
Totalc_Corrected Total count Corrected (counts) 
TMI_FINAL	Final magnetics  (microlevelled)  (nanoTeslas)
DTM_FINAL    	Final digital terrain model (metres)
Spectrum	GR820 257 channel radiometric spectrum (counts)

---------------------------------------------------------------------------
AGEG GDF2 format '.dfn' file included for Radiometric 256 channel data:
---------------------------------------------------------------------------
DEFN 1 ST=RECD,RT=;lineNumber_FINAL:I6:NULL=99999
DEFN 2 ST=RECD,RT=;flight:I4:NULL=999
DEFN 3 ST=RECD,RT=;Date_YYYYMMDD:I9:NULL=99999999
DEFN 4 ST=RECD,RT=;JulianDay_YYYYDDD:I8:NULL=9999999
DEFN 5 ST=RECD,RT=;Fiducial:I7:NULL=999999
DEFN 6 ST=RECD,RT=;Local_Time_DecHrs:F9.5:NULL=99.99999
DEFN 7 ST=RECD,RT=;AGD66TMAMG55_EAST:F10.2:NULL=999999.99
DEFN 8 ST=RECD,RT=;AGD66TMAMG55_NORTH:F11.2:NULL=9999999.99
DEFN 9 ST=RECD,RT=;GDA94MGA55_EAST:F10.2:NULL=999999.99
DEFN 10 ST=RECD,RT=;GDA94MGA55_NORTH:F11.2:NULL=9999999.99
DEFN 11 ST=RECD,RT=;GDA94GEODETIC_LAT:F13.8:NULL=999.99999999
DEFN 12 ST=RECD,RT=;GDA94GEODETIC_LONG:F13.8:NULL=-99.99999999
DEFN 13 ST=RECD,RT=;Magnetics_Final_microlevelled:F10.3:NULL=99999.999
DEFN 14 ST=RECD,RT=;live_time_milliseconds:F6.0:NULL=99999
DEFN 15 ST=RECD,RT=;Cosmic_background_cps:F5.0:NULL=9999
DEFN 16 ST=RECD,RT=;Raw_potassium_cps:F5.0:NULL=9999
DEFN 17 ST=RECD,RT=;Raw_uranium_cps:F5.0:NULL=9999
DEFN 18 ST=RECD,RT=;Raw_thorium_cps:F5.0:NULL=9999
DEFN 19 ST=RECD,RT=;Raw_total_cps:F5.0:NULL=99999
DEFN 20 ST=RECD,RT=;Final_Potassium_percent:F8.4:NULL=999.9999
DEFN 21 ST=RECD,RT=;Final_Uranium_ppm:F8.4:NULL=999.9999
DEFN 22 ST=RECD,RT=;Final_Thorium_ppm:F8.4:NULL=999.9999
DEFN 23 ST=RECD,RT=;Final_Total_Count_nGh:F9.3:NULL=99999.999
DEFN 24 ST=RECD,RT=;Digital_Terrain_Model_Meters:F7.1:NULL=9999.9
DEFN 25 ST=RECD,RT=;Barometric_Height_Meters:F7.1:NULL=9999.9
DEFN 26 ST=RECD,RT=;Pressure_Millibars:F7.1:NULL=9999.9
DEFN 27 ST=RECD,RT=;Effective_STP_Height_meters:F7.1:NULL=9999.9
DEFN 28 ST=RECD,RT=;Radar_Altimeter_Meters:F7.1:NULL=9999.9
DEFN 29 ST=RECD,RT=;GPS_Height_Meters:F7.1:NULL=9999.9
DEFN 30 ST=RECD,RT=;Temperature_DegC:F6.1:NULL=999.9
DEFN 31 ST=RECD,RT=;Data_Used_yes1:I2:NULL=9;END DEFN
DEFN 32 ST=RECD,RT=;spectrum:I5:NULL=-999
DEFN 33 ST=RECD,RT=;spectrum:I5:NULL=-999
DEFN 34 ST=RECD,RT=;spectrum:I5:NULL=-999
.....
.....
.....
DEFN 289 ST=RECD,RT=;spectrum:I5:NULL=-999;END DEFN

=======================================================================
			GRIDDED DATA FILES:
=======================================================================
Format:		ER Mapper

Cell size:	40 metres

Datum: 		AGD66
Projection:	TMAMG	
Zone:	 	55

Files:
	TMI..GRID              	Total magnetic intensity (nanoTeslas)
	TMI_1VD..GRID		First vertical derivative TMI (nT/m)
	DTM..GRID              	Digital terrain model (metres)
	Potassium_Perc..GRID    Potassium (percent)
	Thorium_PPM..GRID       Thorium (ppm)
	Uranium_PPM..GRID       Uranium (ppm)
	TotalC_Ngph..GRID	Total Dose Rate (Ngph)
	Radar_Altimeter..GRID	Radar_Altimeter (metres)

======================================================================
			QC PLOT FILES:
======================================================================

Format:		HPGL2

Files:	

AREA C - Western Tasmania. FIELD QC MAPS:
-------------------------------------------			
100K_TAS_N_4thDIFF.prn
100K_TAS_N_Flight_FieldLines.prn
100K_TAS_N_Misclosure.prn
100K_TAS_N_Radalt.prn
100K_TAS_S_4thDIFF.prn
100K_TAS_S_Flight_FieldLines.prn
100K_TAS_S_Misclosure.prn
100K_TAS_S_Radalt.prn
200K_TAS_NS_Flight_FieldLines.prn

AREA C - Western Tasmania. FINAL QC MAPS:
-------------------------------------------			

100K_TAS_N_Flight_FinalLines.prn
100K_TAS_S_Flight_FinalLines.prn
250K_Tas_1VD_Sun.prn
250K_Tas_DTM_Sun.prn
250K_Tas_Potas_Sun.prn
250K_Tas_RGB.prn
250K_Tas_TMI_Sun.prn
250K_Tas_Thor_Sun.prn
250K_Tas_TotalC_Sun.prn
250K_Tas_Uran_Sun.prn

AREA E - D'Aguilar Range. FIELD QC MAPS:
-------------------------------------------			

50K_TAS_SmallA_4thDIFF.prn
50K_TAS_SmallA_Flight_Fieldlines.prn
50K_TAS_SmallA_Misclosure.prn
50K_TAS_SmallA_Radalt.prn

AREA E - D'Aguilar Range. FINAL QC MAPS:
-------------------------------------------			

100K_TAS_DTM_Sun.prn
100K_TAS_Flight_FinalLines.prn
100K_TAS_Potas_Sun.prn
100K_TAS_RGB.prn
100K_TAS_TMI_1VD_Sun.prn
100K_TAS_TMI_Sun.prn
100K_TAS_Thor_Sun.prn
100K_TAS_Tot_Sun.prn
100K_TAS_Uran_Sun.prn

-------------------------------------------------------------------------------    

                            DATA ACQUISITION
-------------------------------------------------------------------------------    

 AIRBORNE SURVEY SPECIFICATIONS   

 Survey flown:                  January 2001 - March 2001
 Traverse line spacing:         200 metres
 Traverse line direction:       090/270 degrees
 Tie line spacing:              2000 metres
 Tie line direction:            000/180 degrees
 Survey height:                 Magnetometer on boom at 80m agl
                                Spectrometer detector in aircraft at 80m agl
 Data acquisition:              Geo Instruments Model G2001 system
 Aircraft:                      Bell 206BIII helicopter VH-JWF 
 
 MAGNETOMETER
 Type:                          Geometrics G822A Caesium vapour
 Resolution:                    0.001 nT
 Recording interval:            0.1 sec (approx. 3.0 metres sampling)
 Compensation:                  RMS AADCII real time system
 Installation:                  Magnetometer mounted on forward boom

 GAMMA SPECTROMETER
 Type:                          Exploranium GR820 256 channel
 Crystal volume:                Downward looking 16.8 litres
 Recording interval:            1.0 sec (approx. 30 metres sampling)
 Spectral windows IAEA:         Window Range            Energy (MeV)
                                From      To            From       To
 Total Count:                   34        233           0.41       2.81
 Potassium (K40):               115       131           1.37       1.57
 Uranium (Bi214):               139       155           1.66       1.86
 Thorium (Tl208):               202       233           2.41       2.81
 Cosmic:                         -         -            3.00      >6.00
 Calibration:                   Real-time automatic gain stabilisation
                                based on tracking of the Thorium peak

 NAVIGATION              
 Flight path navigation:        Real time satellite
                                Differential GPS system
 Navigation equipment:          Fugro OMNISTAR GPS receivers
 Flight path record:            WGS84 Easting/ Northing coordinates converted to
                                AGD66 XY coordinates 
 Radar altimeter:               Collins Alt50
 DGPS base station:             Fugro OMNISTAR(Wide Area Network)
                                

                 DATA PROCESSING

 MAGNETIC DATA
 The magnetic data has been corrected for regional gradient by
 subtraction of IGRF model 2001.2 and secular variation model
 1995-2000. Diurnal variations have been removed. System parallax
 has been removed. Tieline levelling has been applied.
 Microlevelling has been applied. The mean diurnal value and
 the IGRF base value have been added to the data.
 

 GAMMA SPECTROMETRIC DATA
 NASVD noise reduction applied using 4 retained components
 Live time corrected
 Cosmic and aircraft background removed
 Radon correction method:       Spectral ratioing  C1= 1.90 C2= 0.65
 Temperature and pressure corrected
 Compton stripping:             VH-JWF                  
 Alpha:                         0.2728                  
 Beta:                          0.4435                  
 Gamma:                         0.7861                  
 Height attenuated to:          73 metres mean terrain clearance
                                VH-JWF                  
 Total count:                   0.00630/metre          
 Potassium count:               0.00910/metre          
 Uranium count:                 0.00510/metre          
 Thorium count:                 0.00730/metre          
 Sensitivity constants:         VH-JWF                  
 Total Count - 1ngray/hr:       19.97 cps               
 Potassium - 1%:                76.00 cps                
 Uranium - 1ppm:                6.88 cps                 
 Thorium - 1ppm:                4.20 cps                
 Calibration ranges:            Bruthen Range (hovering)
                                Londonderry, NSW (CSIRO pads)
   
 GRIDDING
 Algorithm:                     Akima spline
 Grid mesh size:                40 x 40 metres
 Grid filter:                   None

 LINE NUMBERING
 Line numbers are in the form 'AbcdE' where
 A = Line type (1 = traverse, 7 = tie, 9 = test)
 bcd = line sequence number
 E = line attempt number
 eg: 10021 is traverse line 2 attempt 1
     70482 is tie lie 48 attempt 2
     91161 is the first test line from flight 116

 TECHNICAL SUPERVISION
 Mineral Resources Tasmania, & Geo Instruments Pty Ltd.

    
 BIBLIOGRAPHIC REFERENCE
 Surveyed by:                   GeoInstruments Pty Ltd, SYDNEY
 Geo Instruments job number:    2101
 Processed by:                  GeoInstruments Pty Ltd
 Grid production by:            GeoInstruments Pty Ltd
 