Additional methods for the stable calculation of isotropic Gaussian filter coefficients: The case of a truncated filter kernel
D Piretzidis, MG Sideris�- Computers & Geosciences, 2020 - Elsevier
The isotropic Gaussian filter is frequently used as a post-processing method for mitigating
errors in Gravity Recovery and Climate Experiment (GRACE) time-variable gravity field
solutions. It is known that the recurrent calculation of isotropic Gaussian filter coefficients in
the spherical harmonic domain results in numerical instabilities. This issue has been
recently resolved by Piretzidis & Sideris (Computers & Geosciences 133: 104303) for the
case of a global Gaussian filter. In this paper, we extend this work for the case of a regional�…
errors in Gravity Recovery and Climate Experiment (GRACE) time-variable gravity field
solutions. It is known that the recurrent calculation of isotropic Gaussian filter coefficients in
the spherical harmonic domain results in numerical instabilities. This issue has been
recently resolved by Piretzidis & Sideris (Computers & Geosciences 133: 104303) for the
case of a global Gaussian filter. In this paper, we extend this work for the case of a regional�…
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