SLA_DCC2S - Cartesian to Spherical   

ACTION:

Cartesian coordinates to spherical coordinates (double precision).

CALL:

CALL sla_DCC2S (V, A, B)

GIVEN:

$$[\,x,y,z\,]$$ V

RETURNED:

A,B spherical coordinates in radians

NOTES:

1.

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.

2.

If V is null, zero A and B are returned.

3.

At either pole, zero A is returned.