Module gnomic 

Gnomonic projection

Functions

tpors

Solve for tangent point, spherical

tporv

Solve for tangent point, vector

tpsts

Deproject tangent plane to celestial, spherical

tpstv

Deproject tangent plane to celestial, vector

tpxes

Project celestial to tangent plane, spherical

tpxev

Project celestial to tangent plane, vector