slaDcc2s -

SYNOPSYS

PARAMETERS

double *v

double *a

double *b

DESCRIPTION

  Direction cosines to spherical coordinates.

  (double precision)

Given

     v      double[3]   x,y,z vector

Returned

     *a,*b  double      spherical coordinates in radians

  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.

  If v is null, zero a and b are returned.
  At either pole, zero a is returned.

  P.T.Wallace   Starlink   31 October 1993

SEE ALSO

• slalib.3