Interplanetary Systems
Interplanetary-radio communication system not only communicate with spacecraft, but are also used to determine their position. This can be done either using a transponder on-board a spacecraft that echoes a radio signal back, or using radar. Orientation information can be obtained using star trackers.
Read more about this topic: Positioning System
Famous quotes containing the word systems:
“In all systems of theology the devil figures as a male person.... Yes, it is women who keep the church going.”
—Don Marquis (1878–1937)
Related Subjects
Related Phrases
Related Words