(DoD) The time it takes for a satellite to complete one orbit around the earth.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
| APA | Military Dictionary (DoD). (2011). period. Retrieved September 22, 2026, from http://smartdefine.org/period/definitions/1963293 |
| Chicago | Military Dictionary (DoD). 2011. "period" http://smartdefine.org/period/definitions/1963293 (accessed September 22, 2026). |
| Harvard | Military Dictionary (DoD) 2011, period, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/period/definitions/1963293>. |
| MLA | Military Dictionary (DoD). "period" 4 April 2011. Web. 22 September 2026. <http://smartdefine.org/period/definitions/1963293> |