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SourceVRF - Rest frame in which the source velocity is stored

Description:
This attribute identifies the rest frame in which the source velocity is stored (the source velocity is accessed using attribute SourceVel). When setting a new value for the SourceVel attribute, the source velocity should be supplied in the rest frame indicated by this attribute. Likewise, when getting the value of the SourceVel attribute, the velocity will be returned in this rest frame.

If the value of SourceVRF is changed, the value stored for SourceVel will be converted from the old to the new rest frame.

The values which can be supplied are the same as for the StdOfrest attribute (except that SourceVRF cannot be set to "Source"). The default value is "Helio".

Type:
String.

Class Applicability:
SpecFrame
All SpecFrames have this attribute.



next up previous
Next: SourceVel - The source velocity
Up: AST Attribute Descriptions
Previous: Skip - Skip irrelevant data?

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
30th April 2003
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2003 Central Laboratory of the Research Councils