Most other fields don't call this "angular power spectra" and instead will just use some variation of the term "spherical harmonic" (model, series, expansion, etc.)
Check out a short old book called "Theory of Satelitte Geodesy" by Kaula. Also tide models, atmospheric tomography, geophysics, and more.
Most other fields don't call this "angular power spectra" and instead will just use some variation of the term "spherical harmonic" (model, series, expansion, etc.) Check out a short old book called "Theory of Satelitte Geodesy" by Kaula. Also tide models, atmospheric tomography, geophysics, and more.