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+.help map Jun99 "Slalib Package"
+.nf
+
+      SUBROUTINE slMAP (RM, DM, PR, PD, PX, RV, EQ, DATE, RA, DA)
+
+     - - - -
+      M A P
+     - - - -
+
+  Transform star RA,Dec from mean place to geocentric apparent
+
+  The reference frames and timescales used are post IAU 1976.
+
+  References:
+     1984 Astronomical Almanac, pp B39-B41.
+     (also Lederle & Schwan, Astron. Astrophys. 134,
+      1-6, 1984)
+
+  Given:
+     RM,DM    dp     mean RA,Dec (rad)
+     PR,PD    dp     proper motions:  RA,Dec changes per Julian year
+     PX       dp     parallax (arcsec)
+     RV       dp     radial velocity (km/sec, +ve if receding)
+     EQ       dp     epoch and equinox of star data (Julian)
+     DATE     dp     TDB for apparent place (JD-2400000.5)
+
+  Returned:
+     RA,DA    dp     apparent RA,Dec (rad)
+
+  Called:
+     slMAPA       star-independent parameters
+     slMAPQ       quick mean to apparent
+
+  Notes:
+
+  1)  EQ is the Julian epoch specifying both the reference
+      frame and the epoch of the position - usually 2000.
+      For positions where the epoch and equinox are
+      different, use the routine slPM to apply proper
+      motion corrections before using this routine.
+
+  2)  The distinction between the required TDB and TT is
+      always negligible.  Moreover, for all but the most
+      critical applications UTC is adequate.
+
+  3)  The proper motions in RA are dRA/dt rather than
+      cos(Dec)*dRA/dt.
+
+  4)  This routine may be wasteful for some applications
+      because it recomputes the Earth position/velocity and
+      the precession/nutation matrix each time, and because
+      it allows for parallax and proper motion.  Where
+      multiple transformations are to be carried out for one
+      epoch, a faster method is to call the slMAPA routine
+      once and then either the slMAPQ routine (which includes
+      parallax and proper motion) or slMAPZ (which assumes
+      zero parallax and proper motion).
+
+  P.T.Wallace   Starlink   19 January 1993
+
+  Copyright (C) 1995 Rutherford Appleton Laboratory
+  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
+
+.fi
+.endhelp