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The inaccuracies inherent in single-theodolite wind-observation methods necessitate the use of double-theodolite systems to determine winds used for missile launchings. Two approaches leading to the development of double-theodolite plotting boards are presented as a solution for rapidly evaluating double-theodolite balloon-measured winds. The accuracy of wind data derived from use of the boards is compared to computed values.

Plotting Systems for the Evaluation of Double-Theodolite Balloon-Measured Winds