Airborne Gravity 2010 - Geoscience Australia

Airborne Gravity 2010
Figure 9. Flight altitude profiles for six passes along Line 200. The heavy black trace shows the
planned flight profile with a vertical relief of approximately 1,800 m. Graph taken from Studinger
et al. (2007), courtesy of LDEO.
Figure 10. Data profiles for the three accepted GT-1A repeat passes flown on Line 200 with an
RMS of 1.77 mGal compared to the value of 3.07 mGal reported for six passes by Studinger et
al. (2007). (which included two short segments in addition to the three full-length passes). We
rejected the two short segments because of their length and one of the four full-length passes
flown due to excessive turbulence that was outside the specifications of the GT-1A.
Line 300
Studinger et al. (2007) did not present any results for the AIRGrav data acquired for this line so the
corresponding GT-1A data have not been considered.
Line 400
This north-south line of length 176 km was also flown in loose drape mode. Flight 4 passes 1 and 2
were rejected due to excessive coarse channel saturations: 143 and 97 respectively or one every 16
to 24 seconds. These lines would not be accepted in a commercial GT-1A survey as they would be
rejected during in-field post-flight QC analyses. This leaves two passes from flight 3 with an RMS of
1.19 mGal using a 100-second filter, for which by comparison Studinger et al. (2007) reported an RMS
of 2.56 mGal for the GT-1A.
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