Remote sensing
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance (typically from satellite or aircraft). Special cameras collect remotely sensed images, which help researchers "sense" things about the Earth.
History[edit | edit source]
The concept of remote sensing originated in the mid-20th century with the development of photogrammetry. The technology evolved with the advent of aerial photography, satellite imaging, and radar and sonar systems.
Types of Remote Sensing[edit | edit source]
Remote sensing can be classified into two types: active and passive.
Active Remote Sensing[edit | edit source]
Active remote sensing involves the emission of radiation by the sensor itself and the measurement of the energy reflected back. Examples include Lidar and radar.
Passive Remote Sensing[edit | edit source]
Passive remote sensing involves the measurement of natural energy that is reflected or emitted from the observed scene. Examples include infrared, photographic, and radiometric sensors.
Applications[edit | edit source]
Remote sensing has a wide range of applications in many fields, including geography, geology, agriculture, environmental science, and military intelligence.
Geography[edit | edit source]
In geography, remote sensing is used to create detailed maps and to monitor changes in land use and land cover.
Geology[edit | edit source]
In geology, remote sensing can help identify different types of rocks and soils, and detect changes in the Earth's surface due to natural events such as earthquakes and landslides.
Agriculture[edit | edit source]
In agriculture, remote sensing is used to monitor crop growth, identify disease outbreaks, and assess drought conditions.
Environmental Science[edit | edit source]
In environmental science, remote sensing is used to monitor environmental changes, such as deforestation, desertification, and climate change.
Military Intelligence[edit | edit source]
In military intelligence, remote sensing is used for reconnaissance and surveillance, and to detect and monitor military activities.
See Also[edit | edit source]
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 | This geology article is a stub. You can help WikiMD by expanding it. |
 | This agriculture article is a stub. You can help WikiMD by expanding it. |
 | This environment-related article is a stub. You can help WikiMD by expanding it. |
 | This military-related article is a stub. You can help WikiMD by expanding it. |
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Contributors: Prab R. Tumpati, MD
