Package Contents

The coordConv package provides the following classes and functions. See the main documentation for an overview, example and installation instructions.

• Coord: represents a position on the sky, with proper motion and radial velocity; provides easy access to spherical and cartesian position. Coord includes spherical geometry methods angularSeparation, directionTo and offset.
• Coordinate system objects, including:
  • ICRSCoordSys
  • FK5CoordSys
  • FK4CoordSys
  • GalCoordSys
  • AppGeoCoordSys
  • AppTopoCoordSys
  • ObsCoordSys: refracted apparent topocentric
• Site: information about the observatory, current earth orientation data (using the IERS Earth Orientation bulletin if maximum accuracy is wanted) and refraction coefficients. The contents are required for conversions involving apparent coordinates and are ignored otherwise.
• PVT: an object representing a position, velocity and time.
• PVTCoord: a Coord with nonzero instantaneous cartesian velocity.
• Position conversion functions:
  • appTopoFromAppGeo, appGeoFromAppTopo
  • obsFromAppTopo, appTopoFromObs
• Time conversion functions:
  • julianEpochFromTAI and taiFromJulianEpoch
  • besselianEpochFromTAI and taiFromBesselianEpoch
  • lastFromTAI
• Utility functions:
  • 2d vector functions: rot2D, polarFromXY and xyFromPolar
  • computeRotationMatrix computes a 3d rotation matrix given an axial vector and amount of rotation
  • Trig functions in degrees: sind, cosd, tand, asind, acosd, atand and atan2d
  • Functions to wrap angles: wrapPos, wrapCtr and wrapNear
  • distanceFromParallax and parallaxFromDistance
  • hypot (not standard in C++ until C++11)