The changes fall into the following categories:

- Change in the copyright status of the DAT routine.
- Implementation of two new categories of routines, viz:
- There are three routines for the horizon/equatorial plane coordinates.
- There are six routines dealing with gnomonic (tangent plane) projections.

- Due to the introduction of these new routines, The Astrometry Tools Cookbook, the test program and other supporting files have also been updated.
- Other minor documentation/typographical corrections to various files.

- iau_DAT.for — Code now classified as "user-replaceable support
routine". Thus the terms and conditions at the end
are also modified.

sofa_ts_f.pdf — Updated Cookbook to include information about the change in status. - iau_AE2HD — (azimuth, altitude) to (hour angle, declination)

iau_HD2AE — (hour angle, declination) to (azimuth, altitude)

iau_HD2PA — parallactic angle - iau_TPORS — solve for tangent point, spherical

iau_TPORV — solve for tangent point, vector

iau_TPSTS — project tangent plane to celestial, spherical

iau_TPSTV — project tangent plane to celestial, vector

iau_TPXES — project celestial to tangent plane, spherical

iau_TPXEV — project celestial to tangent plane, vector - t_sofa_f.for — Validation program

sofa_ast_f.pdf — Astrometry Tools Cookbook, with added information on the new routines - board.lis, copyr.lis, intro.lis, sofa_lib.lis & title.lis — updated compononents of the manual.
- The following routines/files have had very minor documentation changes, mostly typographical:
- iau_ATIOQ
- iau_EECT00
- iau_EQEQ94
- iau_FK52H
- iau_FK5HIP
- iau_GMST82
- iau_H2FK5
- iau_PLAN94
- sofa_pn_f.pdf

- iauDat.c — Code now classified as "user-replaceable support
routine". Thus the terms and conditions at the end
are also modified.

sofa_ts_c.pdf — Updated Cookbook to include information about the change in status. - iauAe2hd — (azimuth, altitude) to (hour angle, declination)

iauHd2ae — (hour angle, declination) to (azimuth, altitude)

iauHd2pa — parallactic angle - iauTpors — solve for tangent point, spherical

iauTporv — solve for tangent point, vector

iauTpsts — project tangent plane to celestial, spherical

iauTpstv — project tangent plane to celestial, vector

iauTpxes — project celestial to tangent plane, spherical

iauTpxev — project celestial to tangent plane, vector - sofa_h — The include file updated with the new routines

t_sofa_c.c — Validation program

sofa_ast_c.pdf — Astrometry Tools Cookbook, with added information on the new routines - board.lis, copyr.lis, intro.lis, sofa_lib.lis & title.lis — updated compononents of the manual.
- The following routines/files have had very minor documentation changes, mostly typographical:
- iauDtdb
- iauEect00
- iauEpv00
- iauEqeq94
- iauFk52h
- iauFk5hip
- iauG2icrs
- iauGmst82
- iauH2fk5
- iauIcrs2g
- iauNut00a
- iauNut00b
- iauNut80
- iauPlan94
- iauS00
- iauS06
- iauXy06
- sofa_pn_c.pdf

SOFA Release 14: This changes file was updated on 2018 January 29.