SENSORS
The sensors located on a satellite can be:
ACTIVE SENSORS |
The active sensors generate the energy that hits the target on the Earth's surface and then measure the electromagnetic radiation that is reflected from the target. Examples of active sensors are:
The remote sensing active systems can be divided into:
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PASSIVE SENSORS |
The passive sensors do not emit radiation and can only receive the electromagnetic radiation that is naturally emitted from the target or that is reflected from the target when it receives the radiation from other sources, such as the Sun. There are two categories of Earth remote sensing passive systems:
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