The spherical coordinates are longitude ($+$ve anticlockwise looking from the $+$ve latitude pole) and latitude. The Cartesian coordinates are right handed, with the x axis at zero longitude and latitude, and the z axis at the $+$ve latitude pole.

palDcc2s( double v[3], double $\ast$a, double $\ast$b );

v = double [3] (Given)

a = double $\ast$ (Returned)

b = double $\ast$ (Returned)

• Uses eraC2s(). See SOFA/ERFA documentation for details.