1-15. DESCRIPTION OF TEST PROGRAM SETS (cont)
(22) The electro-optical mask and window assembly is installed on the PNVS night
sensor in place of the shroud assembly.
It contains a honeycomb grill which pro-
vides a uniform background and a glass to allow the view to be aimed into the tar-
(23) The mask assembly has a honeycomb grill which provides a uniform background
for aligning the TADS night sensor assembly.