The covers have been installed on the canister housings to protect the space-exposed hardware. The contamination stain shows an outline of tray clampblock locations on the experiment tray flanges. This photograph is of the upper left one-fourth of the tray. Note the extreme dark brown discoloration around the grid voltage plug in the corner of the tray. This photograph is of the upper right one-fourth of the tray.
Some dark contamination is visible below the canister.
Some shadows are caused by photographic lighting. The cover has been installed on the canister housing to protect the space-exposed hardware. This photograph is of the lower right one-fourth of the tray. Note the extreme brown discoloration around the grid voltage leads and plug. The cover has been installed on the canister housing to protect the space-exposed hardware.