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Creating a SkyFrame

The SkyFrame constructor function is particularly simple and a SkyFrame with default attributes is created as follows:

      INCLUDE 'AST_PAR'
      INTEGER SKYFRAME, STATUS

      STATUS = 0

      ...

      SKYFRAME = AST_SKYFRAME( ' ', STATUS )

Such a SkyFrame would represent the default celestial coordinate system which, at present, is the ICRS system (the default was "FK5(J2000)" in versions of AST prior to 3.0).


next up previous 264
Next: Specifying a Particular Celestial Coordinate System
Up: Celestial Coordinate Systems (SkyFrames)
Previous: The SkyFrame Model

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council