- journal_title：The Leading Edge
- Contributor：M. Andy Kass
- Publisher：Society of Exploration Geophysicists
- Date：2013-08-01
- Format：text/html
- Language：en
- Identifier：10.1190/tle32080932.1
- journal_abbrev：The Leading Edge
- issn：1070-485X
- volume：32
- issue：8
- firstpage：932
- section：Special section: Gravity and potential fields
Line spacing and flight height are critical parameters in airborne gravity gradient surveys; the optimal trade-off between survey costs and desired resolution, however, is different for every situation. This article investigates the additional benefit of reducing the flight height and line spacing though a study of a survey conducted over the Great Sand Dunes National Park and Preserve, which is the highest-resolution public-domain airborne gravity gradient data set available, with overlapping high- and lower-resolution surveys. By using Fourier analysis and matched filtering, it is shown that while the lower-resolution survey delineates the target body, reducing the flight height from 80 m to 40 m and the line spacing from 100 m to 50 m improves the recoverable resolution even at basement depths.