Airborne Gravity 2010 - Geoscience Australia

Airborne Gravity 2010
Figure 16. (a) Ground free-air gravity upward continued 280 m to the survey altitude. (b) GT-2A
airborne free-air data. Line direction was north-south with a line spacing of 1 km.
(a)
(b)
Figure 17. A set of tight drape repeat lines were flown in a north-south direction across the centre
of the Vredefort Dome impact crater. (a) The RMS noise level of the free-air gravity data profiles
shown here was 1.2 mGal. (b) Elevation profiles with the aircraft profile in blue trace and the
ground surface in green. Terrain clearance was maintained at approximately 80 m to allow
collection of detailed magnetic and radiometric data simultaneously with the gravity data.
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