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Active sensor

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Definitions Edit

General Edit

An active sensor is

a detection device that requires input energy from a source other than that which is being sensed. An example of an active sensor is a photoconductive cell.[1]

Satellite Edit

An active sensor is

[a] measuring instrument in the earth exploration-satellite service or in the space research service by means of which information is obtained by transmission and reception of radio waves.[2]

Surveillance Edit

An active sensor is

a detection device that emits energy capable of being detected by itself. An example of an active sensor is a measuring instrument that generates a signal, transmits it to a target, and receives a reflected signal from the target. Information concerning the target is obtained by comparison of the received signal with the transmitted signal.[3]

References Edit

  1. Federal Standard 1037C:Glossary.
  2. 47 C.F.R. §2.1.
  3. Federal Standard 1037C:Glossary.

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