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+#     23-SEP-2005 (PTW):
+#        Suppression of compiler warnings.
+#        Improved sla_UE2PV.
+#        Package version number changed to 2.5-4.
+
+SLALIB_Version_2.5.5
+
+* The SLALIB C wrapper now optionally uses the CNF library to serialise
+calls from C to Fortran, there-by ensuring that the C functions are
+thread-safe. This dependency on CNF can be switched off by configuring
+SLALIB with the "--without-cnf" option, in which case CNF will not be
+used and the C wrappers will not be thread-safe.
+
+SLALIB_Version_2.5.4
+
+* Changes to sla_EL2UE, sla_FITXY, sla_PV2EL, sla_REFRO, sla_UE2PV and
+  sla_SVD to avoid warnings if compiled with -Wall and -g -O.
+
+* Changes to sla_UE2PV to improve convergence in high-eccentricity
+  cases.
+
+SLALIB_Version_2.5.3                                  Expiry 30 June 2006
+
+* 2006 January 1 leap second added to sla_DAT.
+
+SLALIB_Version_2.5.2                                  Expiry 31 March 2006
+
+* Bug-fix to sla_DSEPV.  Precisely antipodal vectors returned zero
+  instead of pi.
+
+SLALIB_Version_2.5.1                                  Expiry 31 March 2006
+
+* An additional Earth position/velocity routine, sla_EPV, has been
+  added.  It is bigger and slower than sla_EVP but much more accurate.
+  Position accuracy is a few km;  velocity accuracy is a few mm/s.
+  The sla_PERTUE and sla_PLANTU routines now call this routine in
+  order to deliver better predictions for near-Earth objects.
+
+SLALIB_Version_2.4-14                              Expiry 31 December 2005
+
+* Cosmetic changes to about 20% of the routines.
+
+* Updated optical refraction model in REFCOQ and REFRO.
+
+SLALIB_Version_2.4-12
+
+* SLALIB has been autoconfed and integrated into the new Starlink build
+  system.
+
+* It has been released under the Gnu General Public License
+
+SLALIB_Version_2.4-11                                 Expiry 31 March 2004
+
+The latest releases of SLALIB include the following changes:
+
+* A new routine PLANTU has been added.  It predicts the topocentric
+  apparent RA,Dec of a solar-system body given the Universal Elements.
+  It is a Universal-Elements counterpart to PLANTE, which uses
+  conventional spherical elements (and which now calls PLANTU).
+
+* The documentation for the suite of heliocentric orbital elements
+  routines has been improved to make it easier and more obvious how
+  to use of elements from JPL Horizons and from the Minor Planet
+  Center.
+
+  Confusion over epochs has often arisen, because the epoch of osculation
+  (when the elements are momentarily correct) is completely separate from
+  the epochs that locate a body in its orbit, the former having a role
+  only when appying perturbations.  Part of the reason for this confusion
+  is that for major and minor planets it is conventional to adopt the
+  same epoch for (i) osculation and (ii) computing the anomaly or longitude
+  that fixes the body, even though they could in principle be different.
+  For the comet case this convention is impossible because the choice of
+  perihelion dictates the epoch fixing the body, and hence the existence
+  of (and need for) two independent concepts of epoch is exposed.
+
+  The SLALIB routines in question, especially slaPlante, now have extra
+  explanation dealing with the three distinct epochs (date of observation,
+  fixing the body, and osculation) and also some notes dealing with JPL
+  and MPC elements.  Additionally, a table has been added to SUN/67
+  showing how to use the JPL and MPC elements.
+
+ P.T.Wallace
+ 8 April 2005
+
+ ptw@tpsoft.demon.co.uk
+ +44-1235-531198
+--------------------------------------------------------------------------