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.help dcc2s Jun99 "Slalib Package"
.nf
SUBROUTINE slDC2S (V, A, B)
- - - - - -
D C 2 S
- - - - - -
Direction cosines to spherical coordinates (double precision)
Given:
V d(3) x,y,z vector
Returned:
A,B d 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 July 1989
Copyright (C) 1995 Rutherford Appleton Laboratory
Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
.fi
.endhelp
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