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The following describes the most significant changes which have
occurred in the AST library between versions V4.5 and V4.6:
- The TimeFrame class now support Local Time as a time scale. The offset
from UTC to Local Time is specified by a new TimeFrame attribute called
LTOffset.
- A new class called Plot3D has been added. The Plot3D class allows
the creation of 3-dimensional annotated coordinate grids.
- A correction for diurnal aberration is now included when
converting between AZEL and other celestial coordinate systems. The
correction is based on the value of the ObsLat Frame attribute (the
geodetic latitude of the observer).
- A bug has been fixed which caused the DUT1 attribute to be ignored
by the SkyFrame class when finding conversions between AZEL and other
celestial coordinate systems.
Next: Changes Introduced in V5.0
Up: Changes and New Features
Previous: Changes Introduced in V4.5
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council