slepian_delta
Spatiospectral localization of data from the GRACE mission using Slepian functions as developed by:
Harig & Simons
Proc. Natl. Acad. Sc., 109 (49), 19934–19937, 2012, doi: 10.1073/pnas.1206785109
which you may cite if you find any of these routines useful!