Thetype exposes the following members.
Convert degrees, arcminutes, arcseconds to radians.
Normalize angle into the range 0 <= a < 2pi.
Transform ICRS star data, epoch J2000.0, to CIRS using the SOFA Atci13 function.
ICRS RA,Dec to observed place using the SOFA Atco13 function.
Cleans up the SOFA object
Encode date and time fields into 2-part Julian Date (or in the case of UTC a quasi-JD form that includes special provision for leap seconds).
Equation of the origins, IAU 2006 precession and IAU 2000A nutation.
Unloads a library DLL
Transform star RA,Dec from geocentric CIRS to ICRS astrometric using the SOFA Atic13 function.
CIRS RA,Dec to observed place using the SOFA Atio13 funciton.
Loads a library DLL
Observed place at a groundbased site to to ICRS astrometric RA,Dec using the SOFA Atoc13 function.
Observed place to CIRS using the SOFA Atoi13 function.
Release date of the SOFA issue currently used by this component.
Major number of the SOFA issue currently used by this component.
Release date of the revision to the SOFA Issue that is actually being used by this component.
Time scale transformation: International Atomic Time, TAI, to Terrestrial Time, TT.
Time scale transformation: International Atomic Time, TAI, to Coordinated Universal Time, UTC.
Convert hours, minutes, seconds to radians.
Time scale transformation: Terrestrial Time, TT, to International Atomic Time, TAI.
Time scale transformation: Coordinated Universal Time, UTC, to International Atomic Time, TAI.
The class's functionality is provided by underlying DLLs compiled from unmodified original C source code distributed by SOFA but the class does not constitute software provided by and/or endorsed by SOFA. No change whatsoever has been made to the algorithms implemented by SOFA that realise IAU standards.
SOFA provides a validation routine to confirm that the compiled library provides expected results. 32 and 64bit versions of this routine (SofaTestXX.exe and SofaTestXX-64.exe, where XX is the issue number) are included in this distribution and can be found in the Common Files\ASCOM\Astrometry directory. To run them open a command prompt in the Astrometry directory and enter the commands SofaTest10 /verbose and SofaTest10-64 /verbose. The susbset of these tests that is relevant to the routines presented in this component have also been incorporated in the ASCOM Diagnostics tool and expected operation of the SOFA routnines can be confirmed through this tool.
Further information on the full library of SOFA routines is available here: http://www.iausofa.org/