active remote sensing
See Also: passive remote sensing, remote sensing
[remote sensing] A remote-sensing system, such as radar, that produces electromagnetic radiation and measures its reflection back from a surface.
Active Remote Sensing, Aerial Photography, Atmosphere, Attribute, Azimuth,
Bearing, Biosphere,
Cartography, Contour Interval, Contour Line, Coordinated Universal Time, ...
active remote sensing
A remote-sensing system, such as radar, that produces electromagnetic radiation and measures its reflection back from a surface. Referenced by: Remote sensing.
Active Server Pages ...
active remote sensing-Remote sensing methods that provide their own source of electromagnetic radiation to illuminate the terrain. Radar is one example. acuity-A measure of human ability to perceive spatial variations in a scene.
Numerous passive and active remote sensing systems mounted on satellites or aircraft are currently available for acquiring data for GIS applications, and many additional remote sensing systems will become available to GIS users in the near future.
Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a passive sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR is an example of active remote sensing ...
RADAR RAdio Detection And Ranging: an active remote sensing system that generates energy in the microwave wavelengths to map the earth's surface. It is not affected by weather or night.
 See also: Remote Sensing, Area, Information, Sensor, Image
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