abrudana WWA.Core by: abrudana 5,644 total downloads last updated 8/18/2020 Latest version: 1.2.0 World Wide Astronomy - SOFA WWA by: abrudana 1,242 total downloads last updated 3/1/2019 Latest version: 2018.1.30.2 SOFA astronomy calendars timescales ecliptic ephemerides precession nutation Set of C# algorithms and procedures that implement standard models used in fundamental astronomy.