Description
This function sets how the spectra are aligned during the
averaging. If this is set to
NONE there is no
alignment. Channels are added in the order they occur
starting with the first channel and proceding until there
are no more channels. If the alignment options is
VELOCITY then averaging is done after first
aligning the data in by velocity. The first scan in the
average determines the velocity definition and reference
frame to use throughout the average. Subsequent scans
first have their x-axes converted to velocity using
that definition and reference frame. If the fractional
channel alignment is > 0.01 channels then a fourier
transform is used to do that portion of the alignment.
Velocity alignment always happens after any rest frequency
adjustment indicated by the
restshiftstate.
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2006-08-01
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