slaDtp2s -

SYNOPSYS

void slaDtp2s(xi, eta, raz, decz, ra, dec)

PARAMETERS

double xi
double eta
double raz
double decz
double *ra
double *dec

DESCRIPTION 


  Transform tangent plane coordinates into spherical.

  (double precision)

Given

     xi,eta      double   tangent plane rectangular coordinates
     raz,decz    double   spherical coordinates of tangent point

Returned

     *ra,*dec    double   spherical coordinates (0-2pi,+/-pi/2)

Called 

 slaDranrm

  P.T.Wallace   Starlink   31 October 1993

SEE ALSO