Definition
Satellite remote sensing refers to the acquisition of information about Earth’s surface and atmosphere using sensors mounted on satellites. These sensors collect data by detecting the energy that is reflected or emitted from Earth.
Etymology
The term “satellite” originates from the Latin word “satellit-“, meaning “attendant” or “companion.” “Remote sensing” combines “remote,” from the Latin “remotus,” meaning “distant,” and “sensing,” which refers to the process of detecting or measuring.
Example usage
‘The researchers used satellite remote sensing to monitor deforestation rates in the Amazon rainforest.’
Interesting fact
Satellite remote sensing has been crucial in climate research, providing essential data for understanding global climate patterns and changes.
Source: NASA Earth Science Division
Explanation and detail
How it Works
Satellite remote sensing involves capturing images and data from space. Satellites are equipped with sensors that can detect various wavelengths of light and other electromagnetic radiation. This capability allows scientists to observe features that are not visible to the naked eye.
Applications
Remote sensing is used in a multitude of fields. In agriculture, it helps monitor crop health and predict yields. In environmental science, it tracks changes in land use, deforestation, and natural disasters like wildfires and floods. Additionally, it plays a critical role in weather forecasting and climate monitoring.
Types of Sensors
- Optical Sensors: These capture images using visible light and are similar to traditional cameras.
- Radar Sensors: These use radio waves to detect objects and are useful in penetrating clouds or darkness.
- Infrared Sensors: These detect heat emitted by objects and are valuable for studying vegetation and thermal properties.
