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  SOFA Library Issue 2009-02-01 for ANSI C

This is the master page for the SOFA Library Issue 2009-02-01 for ANSI C. From here you can find your way to all the resources comprising this Issue, including notes and source download pages.


Issue 2009-02-01 is the first release of the SOFA Library for ANSI C, revised on 2009-04-02.


The complete SOFA Library source set is available in a single download bundle for Unix, Macintosh or Windows systems. This is the preferred method of obtaining the SOFA Library. The ANSI C SOFA Library Issue 2009-02-01 is available to download in various formats.

Please note: Tarballs contain files with Unix line-terminations and Zip archives contain files with DOS line-terminations. Please download the appropriate file for your operating system.


The SOFA product documentation is available in Adobe Portable Document Format (pdf) or plain ASCII text files to guarantee platform independence.The manual may be downloaded as a single file or in sections if you prefer.

  • Complete manual [pdf (308841 bytes), ASCII].
Sections (in order):
  • Title page [pdf (1522 bytes), ASCII].
  • Introduction [pdf (7476 bytes), ASCII].
  • Vector/Matrix library [pdf (7475 bytes), ASCII].
  • Astronomy Library [pdf (10257 bytes), ASCII].
  • Routine descriptions (Complete manual only).
  • Copyright notice [pdf (3720 bytes), ASCII].
  • Constants [pdf (1726 bytes), ASCII].
  • SOFA Board [pdf (1704 bytes), ASCII].
  • Changes [pdf (1901 bytes), ASCII] since the previous release.

A cookbook (232763 bytes) explaining how to use the SOFA routines that address Earth attitude (precession-nutation, Earth rotation etc.) is available with this release.


The source for the SOFA Library may be viewed from the complete list index. In addition the routines are indexed by section and subsection:
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Last modified: 2017 April 23