openppf ExA/spectre0.ppf
disp spectre0
openppf ExA/spectre1.ppf
disp spectre1
openppf ExA/spectre2.ppf
disp spectre2
delobjs *
readfits ExA/signal0.ppf
readfits ExA/signal0.fits
disp signal0
objaoper 
help objaoper 
objaoper signal0 row 0 l0
disp l0
objaoper signal0 row 1 l1
disp l1
objaoper signal0 row 20 l20