Jul 20, 2023

Set of algorithms and procedures used in fundamental astronomy

The SOFA Collection consists of libraries of routines in ANSI C. There is a suite of vector/matrix routines and various utilities that underpin the astronomy algorithms, which include routines for the following

  • Astrometry
  • Calendars
  • Time Scales
  • Ecliptic Coordinates
  • Earth Rotation and Sidereal Time
  • Ephemerides medium precision
  • Fundamental Arguments
  • Galactic Coordinates
  • Geocentric/Geodetic Transformations
  • Precession, Nutation and Polar Motion
  • Star Catalog Conversion

Checkout these related ports:
  • Xworld - Earth as seen from the direction of the sun
  • Xtide - Harmonic tide clock and tide predictor
  • Xplanet - Draw pictures of the earth textured by an image
  • Xphoon - Set the root window to the moon in its current phase
  • Xmoontool - Version of John Walker's classical moontool for X11/Motif
  • Xephem - Interactive astronomical ephemeris program
  • Xeartk - Small demo for tkgeomap
  • Xearth - Set the root window to the image of earth
  • Wmsun - Dockapp that displays the rise and set times of the Sun
  • Wmspaceweather - DockApp that shows the weather at geosynchronous orbit
  • Wmsolar - Dockapp that displays the Solar System viewed from the top
  • Wmmoonclock - Displays the phase of the moon, plus orbital data
  • Wmjupiter - Dockapp that displays information on Jupiter
  • Wmglobe - Neat xearth-like WindowMaker dockapp
  • Weather - Utility to provide current weather conditions and forecasts