Summary of changes

This is the list of updates and changes that are actual errors. Minor improvements and typographical adjustments are not listed. They include changing capitalisation, e.g. AU -> au and Of -> of, and consistent spelling i.e. catalogue -> catalog.

Corrections to code in the SOFA FORTRAN Library

STARPV & PVSTAR — Code changes to make better use of machine precision

Corrections to code in the SOFA C Library

Starpv & Pvstar — Code changes to make better use of machine precision

Updated parameters in the SOFA FORTRAN Library

DAT — PARAMETER ( IYV = 2023 )

Updated parameters in the SOFA C Library

Dat — enum { IYV = 2023 };

Corrections to comments in the SOFA FORTRAN Library

1. A2TF & D2TF — Notes: 3, last line
   * by testing for IHMSF(1)=24 and setting IHMSF(2-4) to zero.

2. ATOIQ — Notes: 1, first line
   * 1) "Observed" Az,ZD means ...

3. C2T06A — Notes: 1, 2nd line, i.e. the end of the first sentence is
   * apportioned in any convenient way between the two arguments.

4. FK45Z — Notes: 4, last sentence
   * stars, whether polar or not. At epoch J2000.0, ...

5. FK54Z — Notes 3, first line is
   3) Conversion from J2000.0 FK5 to B1950.0 FK4 only is provided for.

6. HFK5Z — Notes: 6, first line
   6) See also iau_FK52H, iau_H2FK5, iau_FK5HZ.

7. LTPB — Notes: 1, line 3
   * where P_ICRS is a vector in the International Celestial Reference

Corrections to comments in the SOFA C Library

1. A2tf — Note 3, last line
   ** by testing for ihmsf[0]=24 and setting ihmsf[1-3] to zero.

2. Atoiq — Notes: 1, first line
   ** 1) "Observed" Az,ZD means ...

3. C2t06a — Notes: 1, 2nd line, i.e. the end of the first sentence is
   < ** apportioned in any convenient way between the two arguments.

4. Fk45z — Notes: 4, last sentence
   ** motions for all stars, whether polar or not. At epoch J2000.0,

5. Fk54z — Notes 3, first line is
   ** 3) Conversion from J2000.0 FK5 to B1950.0 FK4 only is provided for.

6. Hfk5z — Notes: 6, first line
   ** 6) See also iauFk52h, iauH2fk5, iauFk5hz.<

7. The test program t_sofa_c.c. In the routine t_atccq the list of called routines is
   ** Called: iauApci13, iauAtccq, vvd

SOFA Release 19: This changes file was updated on 2023 May 31.