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LAS\MODIFY BEAM_EFF Value
LAS\MODIFY BEAM_EFF /RUZE [B0 Sigma]
Change the beam efficiency.
The first syntax allows to define the new beam efficiency from a single
value for the whole spectrum. If the beam efficiency previously had a
non zero value, the spectrum intensities and affected header parameters
are rescaled according to the old and new values. Otherwise, only the
beam efficiency is set to the new value.
The second syntax allows to use the Ruze's equation, which is more suit-
able for large band spectra:
Beeff(lambda) = B0*exp(-(4*pi*Sigma/lambda)**2)
B0 is the scaling factor with no units (between 0 and 1), and Sigma the
width factor in microns. If the beam efficiency previously had a non ze-
ro value, a rescale factor is evaluated for each channel and is applied
to the intensities, the new beam efficiency is set to the one at the
center of the spectrum, and the affected header parameters are rescaled
according to this new value. Otherwise, only the beam efficiency is set
to this new value.
B0 and Sigma can be omitted for 30M observations after 01-APR-2009. Val-
ues measured at the 30M will be displayed and used in this case.