FUNCTION dustem_initialize_internal_sed,Nsed

;initializes an SED in the !dustem_data internal format

sed={instru_names:replicate('',Nsed),filt_names:replicate('',Nsed),wav:replicate(la_undef(5),Nsed),values:replicate(la_undef(5),Nsed),sigma:replicate(la_undef(5),Nsed)}

RETURN,sed

END