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Remote Sensing

Remote Sensing

Remote sensing involves the collection of data about an object from a distance. Humans and many other types of animals accomplish this task with aid of eyes or by the sense of smell or hearing.

Earth scientists use the technique of remote sensing to monitor or measure phenomena or processes found in the Earth's lithosphere, biosphere, hydrosphere, and atmosphere.

Mechanical remote sensing devices have greatly improved the ability to receive and record information about an object without any physical contact. Often, these sensors are positioned away from the object of interest by using helicopters, planes, and satellites. These sensors may be either passive or active. Passive sensors detect energy when the naturally occurring energy is available such as sun energy. Active sensors provide their own energy source as radar waves and record its reflection on the target.

    • Remote sensing Featured Article Remote sensing Remote sensing

      Introduction     Remote sensing can be defined as the collection of data about an object from a distance. Humans and many other types of... More »

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      This image of clouds over the southern Indian Ocean was acquired by NASA’s polar-orbiting Terra spacecraft. The featured study revealed an overall trend of decreasing... More »

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      National Ocean Policy Action Plan draft requests public comments on actions Federal agencies will take to improve the health of oceans, coasts, and the Great Lakes.... More »

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