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GrismNRP
-
The rate of change of refractive index with wavelength
- Description:
- This attribute holds the rate of change of the refractive index of the
grism material with respect to wavelength at the reference wavelength
(given by attribute GrismWaveR). The default value is 0.0 (the
appropriate value for a pure grating disperser with no prism). The
units of this attribute should be consistent with those of attributes
GrismWaveR and GrismG.
- Type:
- Double precision.
- Class Applicability:
-
GrismMap
-
All GrismMaps have this attribute.
Next: GrismTheta - Angle between normal to detector plane and reference ray
Up: AST Attribute Descriptions
Previous: GrismNR - The refractive index at the reference wavelength
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