Comparison study between airborne and ship‐borne full tensor gravity gradiometry (FTG) data

Mims, John; Selman, Dean; Dickinson, Jade L.; Murphy, Colm; Mataragio, James; Jorgensen, G.

doi:10.1190/1.3255906

Cited by 8 publications

(5 citation statements)

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“…Noise having 0.9 E RMS was added to the target GG response to represent the current state-of-art of data acquisition. Mims et al (2009) also note that an airborne system flown over the same test area yielded GG data with 2.9 E RMS noise in the same bandwidth.…”

Section: The Effect Of Gg Noise On Tos and Bos Interpretationmentioning

confidence: 95%

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Gravity Gradient Interpretation of Salt Bodies in Nil‐Zone Regimes

Hatch

Annecchione

2010

SEG Technical Program Expanded Abstracts 2010

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Section: The Effect Of Gg Noise On Tos and Bos Interpretationmentioning

confidence: 95%

“…Mims et al (2009) indicate the noise of a Bell Geospace system mounted on a ship to be 0.9 E at wavelengths greater than 4 km. For the salt body studied here the signal content at wavelengths greater than 4 km is negligible.…”

Section: The Effect Of Gg Noise On Tos and Bos Interpretationmentioning

confidence: 99%

Gravity Gradient Interpretation of Salt Bodies in Nil‐Zone Regimes

Hatch

Annecchione

2010

SEG Technical Program Expanded Abstracts 2010

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“…The FTG system therefore requires precise calibration and continuous feedback. The difference between the vertical gradients acquired on repeat surveys is less than 0.8 Eotvos (Mims, et al, 2009), and airborne vertical gradient (Tzz) data repeat to better than 3.5 Eotvos over 400 meter spacial wavelengths (Murphy et al, 2006).…”

Section: Gravity Gradiometrymentioning

confidence: 97%

Airborne Full Tensor Gravity

Mims

Mataragio

2010

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010

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The gravity tensor measures changes in the three dimensional gravity field along the three axes of motion, giving a nine component array of differentials. Because of symmetry and the Laplacian character of gravity, only five of the components are independent. Gravity has been used for resource exploration since the early 20 th century. The first exploration gravity surveys used a ground based gradiometer that was eventually replaced with ground based gravimeters. In the late 20 th century, a moving platform full tensor gradiometer was developed for use on submarines. Eventually the technology was declassified and applied to commercial resource exploration using marine and airborne acquisition. Since much of acceleration caused by the vessel motion is removed as the gradient is being measured, the gradiometer can provide a high resolution gravity image in a fraction of the time it takes for an equivalent ground gravity survey to be completed. A case study of alluvial diamond exploration provides one example of using airborne gravity gradiometry for resource exploration. SAGEEP 2010Keystone, Colorado

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“…FTG gravity data are measured onboard airborne and marine platforms and have been demonstrated to achieve Tzz detectability thresholds of 2 to 3 E over 200 to 300m for airborne applications. Marine applications offer substantially better accuracy with less than 1E detectability (Mims et al, 2009).…”

Section: Ftg Gravitymentioning

confidence: 99%