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From Citizendium, the Citizens' Compendium

Parent topics

• Radar [r]: A contraction of radio direction and ranging, used for detecting and tracking targets, navigation, imagery, and special applications. [e]
• Sonar [r]: A contraction of sound navigation and ranging, formally includes the active mode in which a pulse goes out and a receiver measures the echo. Also includes hydrophones or passive, listen-only systems. [e]

Subtopics

• Radar altimeter [r]: Add brief definition or description

Other related topics

• Frequency modulation [r]: Add brief definition or description
• Modulation [r]: Add brief definition or description
• Multistatic [r]: Add brief definition or description
• Time synchronization [r]: Add brief definition or description