Fast Fourier transformation in the Earth gravity field analysis at the Antarctic region
Fast Fourier transformation (FFT) was considered which substantially saves time when processing large data arrays due to the summation in the spectral domain instead of the multiplication in the space ones. With using of space, aerial, terrestrial and marine gravimetric data the spatial distribution of gravity anomalies in Antarctic region territory on a uniform grid 2′×2′ was constructed and a terrain correction was introduced. Using of FFT-method the regional model of quasigeoid of Antarctic continent and adjoining water areas was constructed.