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Aligned spectra

In the simplest case, the spectra have all the same resolution, reference channel and reference value: they are aligned and the channel mode (SET ALIGN CHANNEL) can be used. The intensity (temperature) $T(i)$ and weight $w(i)$ of the output sum $S$ are derived from a simple weighted mean of the input spectra:
\textsf{Averaged channel intensity and weight (...
...R(i) + w_T(i)} \\
w_S(i) & = & w_R(i) + w_T(i)
On return, $S$ weight array can vary across the abscissae axis, e.g. in COMPOSITE mode the overlapping channels typically have a double weight compared to the side channels.

Gildas manager 2014-07-01