Regarding the effect of longitude, rather than fiddling with the offset, I think you want two terms, sin(lon) and cos(lon). Together they model a sinusoid with any offset.
Huh, that is neat!
Regarding the effect of longitude, rather than fiddling with the offset, I think you want two terms, sin(lon) and cos(lon). Together they model a sinusoid with any offset.
Huh, that is neat!