I was redirected here from EE.SE with the possibility that you guys could answer my question, let me know if this isn't on topic.
I've been reading about Gravitational Models and they mention something about "geopotential models of the Earth consisting of spherical harmonic coefficients complete to degree and order 360". Would asking a question about such be on topic here?
"20th degree and order EGM2008 model is used to calculate gravity gradients" This is another example.