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GrismNR - The refractive index at the reference wavelength

Description:
This attribute holds refractive index of the grism material at the reference wavelength (given by attribute GrismWaveR). The default value is 1.0.
Type:
Double precision.
Class Applicability:
GrismMap
All GrismMaps have this attribute.


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Next: GrismNRP - The rate of change of refractive index with wavelength
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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