Remote sensing is the science of obtaining data through instruments that is not in physical contact with the object being study. The remote sensing data is energy that is reflected or emitted by the earth’s surface. The energy being collected is radiation wavelengths in the electromagnetic spectrum. The wavelengths in the electromagnetic spectrum that are used for remote sensing are: ultra violet, visible, infrared, microwave. The sensors that collect the wavelengths are either passive (uses energy already available) or active (provides its own energy) and are attached to a plane or satellite. The remote sensors collect and record the data and then the data is analyzed through interpretive and measurement techniques.

 

Remote sensing is used in a variety of fields including:

 

• Oceanography

• Geology

• Topography

• Land use

• Security

• Meteorology