This DVD+R contains FINAL gridded data from the
SOUTH WEST TASMANIAN OFFSHORE AIRBORNE MAGNETIC SURVEY (SWTOAMS)
airborne geophysical survey of 2008.

The survey consists of 1 area.
Aircraft used was:
  VH-WAM Aerocommander 500S

The survey was flown and compiled from January 2008 to May 2008 by
Fugro Airborne Surveys Pty Ltd for Geoscience Australia and is located
on the following 1:250,000 map sheets.
Tasmania North West
Tasmania South West


Gridded data has been supplied in FINAL form.

All grids are in ERMapper format.
Datum =      GDA94
Projection = MGA55

The directory structure is:
<PROJ>/gridded/<GRID FILES>
where:
  PROJ = Geoscience Australia project number

<GRID FILES>
  Grid file names are of the form:
    <gridded_parameter>
    where
       gridded parameters are:
       mag     = Magnetic intensity                                 (nT)
       magS    = Magnetic intensity (smoothed)                      (nT)
       rtp     = Magnetic intensity reduced to the pole             (nT)
       rtp1vd  = 1VD of RTP (2D Fourier)                            (nT/m)
       rtpS    = Magnetic intensity (smoothed) reduced to the pole  (nT)
       rtpS1vd = 1VD of RTPSM (2D Fourier)                          (nT/m)

NOTES:
mag and magS grids gridded using the bi-cubic spline method.

mag:  Corrected for diurnal, IGRF & parallax.
      Tie line levelled and micro-levelled.

magS: As per mag and then a low pass filter was applied to selected areas.

RTP:  Inclination and declination used to compute the RTP.
      Position:     320000 E, 5260000 N, 85 m (MGA55, height is ellipsoidal)
      IGRF:         Model 2005, Date 2008/01/15
      Inclination:  -72.957
      Declination:   13.441

RTPS: Inclination and declination used to compute the RTP.
      Position:     320000 E, 5260000 N, 85 m (MGA55, height is ellipsoidal)
      IGRF:         Model 2005, Date 2008/01/15
      Inclination:  -72.957
      Declination:   13.441
