Abstract
A new class of locally supported radial basis functions on the (unit) sphere is introduced by forming an infinite number of convolutions of "isotropic finite elements." The resulting up functions show useful properties: They are locally supported and are infinitely often differentiable. The main properties of these kernels are studied in detail. In particular, the development of a multiresolution analysis is given based on locally supported zonal functions within the reference space of square-integrable functions over the sphere.
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Freeden, W., Schreiner, M. Multiresolution Analysis by Spherical Up Functions. Constr Approx 23, 241–259 (2006). https://doi.org/10.1007/s00365-005-0613-x
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DOI: https://doi.org/10.1007/s00365-005-0613-x