FORESTRY
REMOTE SENSING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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T or F:Remote sensing systems which measure energy that is naturally available are called active sensors.
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True
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False
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Not sure
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None of the above
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Explanation:
Detailed explanation-1: -Remote sensing systems which measure energy that is naturally available are called passive sensors. Passive sensors can only be used to detect energy when the naturally occurring energy is available.
Detailed explanation-2: -Active remote sensing systems produce therefore their own electromagnetic energy. They transmit and receive the radiation that is reflected or backscattered from the illuminated target. They do not necessitate an external source of radiation (e.g. Sun or Earth).
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