infile, s, a, "", , ,	">Input science data file template name"
skyfile, s, a, "", , ,	">Input sky file template name"
outfile, s, a, "", , ,	">Output science data file template name"
inmask, s, a, "", , ,	">Input science mask file template name (optional)"
skymask, s, a, "", , ,	">Input sky mask file template name (optional)"
outmask, s, a, "", , , 	">Output science mask file template name (required)" 
obsmode, s, a, "", "simul|inter|forenaft", ,		">Observation mode"
fittype, s, a, "", "nearest|overall|linear|leastsq", , 	">Fitting method"
order, i, a, 0, 0, ,	">order of the fitting polynomial"
nptsfit, i, a, 2, 1, ,	">number of points used to do the fitting"

mode, s, h, "al"