Next: Wavelength adjustment
Up: On-line determination of stellar
Previous: Telluric lines removal
The principle of the method is very simple : once the spectrum of an unknown object
is cleaned of instrumental effects, and spurious pixels or lines, it can be adjusted,
order by order, pixel by pixel,
against several reference spectra by a least square method. The reduced of the fit
is taken as a measure of resemblance between the target spectrum and
a reference spectrum.
There are two steps for this :
wavelength adjustment and signal amplitude adjustment.
9/11/1998