. Next: Mirror Related CCF Components Up: CCF Components Previous: CCF Components Contents . Michael Smith 2011-09-20

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Next: History Item Up: Miriad Subroutine Library Previous: Scratch Files . ... This has led to the rather misleading use of the letters ``hd'' as a component of each of the following routine names. subroutine rdhda( tno , itemname , value , default ) subroutine rdhri( tno , itemname , value , default ) subroutine rdhdr( tno , itemname , value , default ) subroutine rdhdd( tno , itemname , value , default ) subroutine rdhdc( tno , itemname , value , ... The item can be arbitrarily large. ...

For non-spherical isotropic particles, the classic variant of the RDG approximation does not include the anisotropy of the shape and hence does not give the correct Rayleigh limit, say, for small ellipsoids. ... We call this variant a modified RDG approximation (MRDG). ... First, the MRDG leads to the correct Rayleigh limit. ... The second approach to generalization of the RDG is connected with the use of the Born iterations for the scattering integral equation [ 95 , 124 , 132 , 264 ]. ...

Next: The Echelle Relation Up: Wavelength Calibration Previous: Wavelength Calibration . A preliminary step to the wavelength calibration consists of extracting the orders of the WLC image which can then be used to determine the dispersion relation in two steps: . ... Both methods are based on the echelle relation and therefore are not applicable if the disperser is not an echelle grating, as it is the case for EFOSC which involves a grism disperser. ...

Next: RGCV for Steepest Up: Generalized Cross-Validation as a Previous: The Richardson-Lucy Algorithm . Cross-validation divides the data into two sets. ... Extending this concept, generalized cross-validation (GCV) uses each data point as the testing set, and then averages a weighted prediction error over the entire data set (Golub et al. ... The main drawback of the GCV criterion comes from the denominator of . ... and is now called the Randomized GCV (RGCV) criterion. ...