Free Access

Fig. 2.

image

Spherically averaged foreground-avoidance power spectra errors (absolute difference) without GPR foreground subtraction, compared to the directly Fourier transformed data. k values that fall under the wedge are excluded. Gridding parameters are abbreviated as follows: o = oversampling factor, s = gridding kernel size, nwl = number of w-layers, and p = padding factor.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.