TRAJECTORY DATA OBTAINABLE FROM DOVAP REDUCTIONS AT THE FIRING LOCATION.
BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Based on the assumption that processing of the photographic film is not considered a time element in obtaining quick approximate data, two general methods are discussed for obtaining total cycle counts from a relatively small sampling of the recorded data. These two methods are 1 the integration of doppler frequency-time curves by a rolling planimeter and, 2 the integration of these curves by means of Simpsons Parabolic Rule. The use of these methods in practice is discussed and the obtaining of frequency-time curves considered in detail. It is found that in the hands of a skilled operator the rolling planimeter yields slightly more accurate total count data, but for general operation Simpsons Parabolic Rule is the more desirable. Accuracies obtainable are considerably better than those of Radar. Incidental to the methods of determining total cycle counts is a simplified computational procedure for obtaining trajectory data from the cycle counts utilizing the total count data from four receiver stations. This simplified computational method is put in a form useful for obtaining data with the greatest possible rapidity. Author
- Guided Missile Trajectories, Accuracy and Ballistics