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SpecVal - The spectral position at which flux values are measured

Description:
This attribute specifies the spectral position (frequency, wavelength, etc.), at which the values described by the FluxFrame are measured. It is used when determining the Mapping between between FluxFrames.

The default value and spectral system used for this attribute are both specified when the FluxFrame is created.

Type:
Floating point.
Class Applicability:
FluxFrame
All FluxFrames have this attribute.


next up previous 264
Next: StcsArea - Return the CoordinateArea component when reading an STC-S document?
Up: AST Attribute Descriptions
Previous: SpecOrigin - The zero point for SpecFrame axis values

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