What is the meaning of tilt angle?

(DoD, NATO) The angle between the optical axis of an air camera and the vertical at the time of exposure.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). tilt angle. Retrieved September 20, 2026, from http://smartdefine.org/tilt_angle/definitions/1964436
ChicagoMilitary Dictionary (DoD). 2011. "tilt angle" http://smartdefine.org/tilt_angle/definitions/1964436 (accessed September 20, 2026).
HarvardMilitary Dictionary (DoD) 2011, tilt angle, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/tilt_angle/definitions/1964436>.
MLAMilitary Dictionary (DoD). "tilt angle" 4 April 2011. Web. 20 September 2026. <http://smartdefine.org/tilt_angle/definitions/1964436>
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