e, air, and ground). At a minimum, the simulation must account for the following weather elements: cloud amount and height, visibility, restrictions to visibility (e.g. precipitation, fog, smoke, dust and sand), precipitation accumulation, surface wind direction andspeed, temperature, relative humidity, altimeter setting, and solar and lunar light data. These weather elements must be allowed to range from tropical to arctic regions, to vary over the geographic area of interest, and to change as often as hourly. In addition, wind direction and speed and temperature in a vertical profile up to 70,000 feet must be allowed to impact Nuclear Biological and ChemicalNBC) weapons with changes incorporated at least twice per day. (iii) Terrain. The simulation must provide a level of resolution of terrain such that tactical considerations of terrain analysis and the dynamic effects of man-made or natural occurrences (e.g. bomb craters, minefields, battle damage on roads, the obstacle effect of rivers, hydrography, and weather) as considered during Intelligence Preparation of the Battlefield (IPB) will affect the battle. The minimum acceptable tactical considerations include the following areas: the impact of line-of-sight (to include sonar and electromagnetic spectrum considerations of concealment, thermal, optical and radar visibility, and signal site emplacement) between potential interactors whether they be sensors or weapon systems, air, ship, or ground mounted; the ability of terrain to support the movement of personnel, vehicles and units over time, and the accurate portrayal of the location of natural and man-made obstacles. The outcomes of the simulated events must be sensitive to changes in the weather (described above in paragraph 4.a.(1)(a)(ii)) as it affects terrain. (iv) Time. The simulation must be capable of running faster than real time to a pre-defined point in time or an event, while requiring min...
