High technology is shrinking the sky, ground, and sea. With advanced electro-optic, infrared, and millimeter wave systems, objects in the sky or on the ground and sea can be detected, recognized, identified, and eliminated, if that is the goal, all before these objects can be seen with the naked eye. The advent of modern systems, however, has also resulted in sensitivities to environmental factors above and beyond those commonly associated with the weather. At issue then is whether the system will function as it was designed to function when one needs it. That means designing equipment to function under adverse environmental conditions when practical. If this is not practical, then the system's deficiencies and the environmental conditions that cause them must be understood so that systems are not depended upon to function when the design criteria are exceeded. This would allow for optimum system utilization and proper system selection for the application to environmental conditions of interest. It would also allow for effective countermeasures or supply opportunities to take advantage of systems used against you. Hence, if it is not practical to design around environmental effects, then methods and environmental sensors must be developed to mitigate those adverse effects. New operational environmental support requirements must be identified at an early stage so that the operational capability for that support will be available when the material enters the inventory. This will optimize system utilization in an adverse environment.