From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 8 Jul 2015 20:46:52 -0400 Subject: Initial commit --- math/slalib/doc/tp2v.hlp | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 math/slalib/doc/tp2v.hlp (limited to 'math/slalib/doc/tp2v.hlp') diff --git a/math/slalib/doc/tp2v.hlp b/math/slalib/doc/tp2v.hlp new file mode 100644 index 00000000..e81c60d1 --- /dev/null +++ b/math/slalib/doc/tp2v.hlp @@ -0,0 +1,40 @@ +.help tp2v Jun99 "Slalib Package" +.nf + + SUBROUTINE slTP2V (XI, ETA, V0, V) + + - - - - - + T P 2 V + - - - - - + + Given the tangent-plane coordinates of a star and the direction + cosines of the tangent point, determine the direction cosines + of the star. + + (single precision) + + Given: + XI,ETA r tangent plane coordinates of star + V0 r(3) direction cosines of tangent point + + Returned: + V r(3) direction cosines of star + + Notes: + + 1 If vector V0 is not of unit length, the returned vector V will + be wrong. + + 2 If vector V0 points at a pole, the returned vector V will be + based on the arbitrary assumption that the RA of the tangent + point is zero. + + 3 This routine is the Cartesian equivalent of the routine slTP2S. + + P.T.Wallace Starlink 11 February 1995 + + Copyright (C) 1995 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp -- cgit