38 a cryostat 40 for cooling the detector of the telescope assembly 36 and a second electronics unit 42 which components cooperate to form imaging data of a target or subject the housing 24 is closed off from the outside environment by a left cover 44 and a right cover 46 which close off access ports 48 and 50 of the housing 24 the ports 48 and 50 allow insertion of the plate assemblies 22a and 22b and various components to be described hereinafter for assembly of the system 20 two further ports of the housing 24 are closed off by a tv laser window 52 and a forward looking infrared flir window 54 which are secured to the housing 24 respectively by window frames 56a b and insulating seals 58a b the windows 52 and 54 permit an observer to view from a location outside the housing 24 images produced by the aforementioned electrooptic imaging equipment carried by the platform 22 the system 20 includes an azimuthal drive assembly 60 which mechanically interconnects the housing 24 with a superstructure of a vehicle carrying the system 20 such as an aircraft interface structure 62 the azimuthal drive assembly 60 comprises a coarse azimuthal az drive 64 a coarse az shock absorber 66 and a coarse az resolver 68 disposed on a bearing 70 and having electric wiring including an az cable wrap 72 the resolver 68 the bearing 70 and.