The Measurement of the Field of View from Airplane Cockpits (1936)
NASA Technical Reports Server (NTRS) · leaf 6
han 1° at a distance of one- By measurement, therefore, from a single point the half mile. A dimension on the vertical axis of 15 feet positions on the surface of the imaginary sphere of the subtends an angle of approximately 0.3°. outline of the obstruction are improperly located in all N. A. C.… … Figure 4—N. A. C. A. visiometer. the camera because of its similarity to the eve. Previ- is represented as too large. The error, moreover, is ous investigators have used the pinhole camera wholly dependent on the distance of the obstruction (reference 11) and have also photographed the image from…
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