Measuring gravity gradient in rugged terrain: HeliFalcon survey in Aso-Oguni, Japan

Tianyou Chen; Mark Dransfield

doi:10.3997/1365-2397.n0124

ISSN: 0263-5046
E-ISSN: 1365-2397

Measuring gravity gradient in rugged terrain: HeliFalcon survey in Aso-Oguni, Japan
Authors Tianyou Chen¹, Mark Dransfield¹
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Affiliations: ¹ CGG Multi-Physics
Source: First Break, Volume 36, Issue 10, Oct 2018, p. 43 - 46
DOI: https://doi.org/10.3997/1365-2397.n0124
- Published online: 01 Oct 2018

Abstract

Since the first Falcon AGG survey in 1999 (van Leuwen et al., 2000), fixed-wing airborne gravity gradiometry (AGG) has proved to be a valuable tool for mining and oil and gas exploration (Dransfield, 2007). The more compact digital Falcon AGG allowed the system to be installed in a helicopter and helicopter AGG surveys began in 2006 (Boggs et al., 2007). Compared with fixed-wing aircraft, the helicopter platform can fly surveys low and slow, offering superior spatial resolution as well as an improved signal-to-noise ratio (Dransfield, 2007). The superior spatial resolution and improved signal-to-noise ratio provided by helicopter AGG enhances its capability to detect smaller targets and better delineate subtler features. Dransfield and Christensen (2013) reported a HeliFalcon performance of 6 Eö RMS at 45 m resolution in vertical gravity gradient, by far the finest spatial resolution of any airborne AGG system.

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Measuring gravity gradient in rugged terrain: HeliFalcon survey in Aso-Oguni, Japan

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Measuring gravity gradient in rugged terrain: HeliFalcon survey in Aso-Oguni, Japan

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