input,s,a,"",,,List of input spectra
output,s,a,"",,,List of output spectra
woutput,s,h,"",,,List of output weight spectra
apertures,s,h,"",,,Apertures to combine
group,s,h,"apertures","all|images|apertures",,Grouping option
combine,s,h,"average","average|sum",,Combining option
scale,s,h,"",,,Header keyword for scaling
weight,s,h,"","",,"Header keyword for weighting
"
w1,r,h,INDEF,,,Starting wavelength of output spectra
w2,r,h,INDEF,,,Ending wavelength of output spectra
dw,r,h,INDEF,,,Wavelength increment of output spectra
nw,i,h,INDEF,,,Length of output spectra
log,b,h,no,,,"Logarithmic increments?
"
interactive,b,h,no,,,Adjust spectra interactively?
sort,s,h,"none","none|increasing|decreasing",,Interactive combining order
cursor,*gcur,h,"",,,Graphics cursor input