Analysis of Tilt Data of Antiaircraft Gun Mounts from HITVAL Field Test,
INSTITUTE FOR DEFENSE ANALYSES ARLINGTON VA SYSTEMS EVALUATION DIV
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The object of the HITVAL program is to verify the validity or lack thereof of mathematical models used to calculate the probability of hit of aircraft fired at by antiaircraft guns. To accomplish this validation of models, a field test was conducted in which aircraft were flown past antiaircraft guns, while their flight paths were recorded by cinetheodolites. The antiaircraft gun crews simulated fire at the aircraft, and instrumentation recorded among other things the gun pointing angles. Given the aircraft flight paths, the gun pointing angles, and ballistics data, a probability of hit can be calculated, which can then be used as a standard of comparison for the mathematical models. This paper reports the findings of an analysis of the mount tilt data as recorded by the instrumentation during preliminary trials of the field test. The analysis was conducted to determine if the data need to be smoothed i.e., whether there is high-frequency noise in the data. The result of the mathematical examination of the spectral structure of the power in the mount tilt data is that the data do contain significant high-frequency noise, and therefore the filtering procedure is necessary.
- Antiaircraft Defense Systems
- Fire Control and Bombing Systems