poster_L_piauilino_SBGf_2019.pdf (4.36 MB)

# Poster: Estimative of the gravity-gradient data from vertical component of the gravitational attraction by using the fast Fourier transform and equivalent-layer techniques

poster

posted on 2019-09-25, 21:13 authored by Larissa S. PiauilinoLarissa S. Piauilino, Valeria C. F. BarbosaValeria C. F. Barbosa, Vanderlei C. Oliveira Jr.Vanderlei C. Oliveira Jr.We
present a comparison between the computing of gravity gradient tensor
components from the vertical component of the gravitational attraction using
the fast Fourier transform and the equivalent-layer techniques. In this
comparison, we consider that the observed data
consist of: (1) the residual gravity field (produced by local sources) and (2)
the overlapping of regional and residual gravity fields. Applications to synthetic data show that the
fast Fourier transform technique amplifies the noise to calculate the six
components of the tensor. Comparing the
FFT and the equivalent-layer results with the true gravity gradient components
produced by local source without regional gravity field, the equivalent-layer
result yields a better result because it shows a smaller residual. However,
when the observed data have a regional
gravity field overlapped to the residual gravity field both techniques yield unacceptable
results, indicating the need of new methodologies to
deal with regional field.