write a note on development satellite remote sensing in the world??????????
Answers
Answer:
Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation, especially the Earth. Remote sensing is used in numerous fields, including geography, land surveying and most Earth science disciplines (for example, hydrology, ecology, meteorology, oceanography, glaciology, geology); it also has military, intelligence, commercial, economic, planning, and humanitarian applications.
Synthetic aperture radar image of Death Valley colored using polarimetry.
In current usage, the term "remote sensing" generally refers to the use of satellite or aircraft-based sensor technologies to detect and classify objects on Earth. It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation). It may be split into "active" remote sensing (when a signal is emitted by a satellite or aircraft to the object and its reflection detected by the sensor) and "passive" remote sensing (when the reflection of sunlight is detected by the sensor).[1]
Answer:
Remote sensing is the science of obtaining information about objects or areas from a distance, typically from aircraft or satellites. A Lidar (Light Detection and Ranging) image created with data collected by NOAA's National Geodetic Survey. In contrast, active sensors use internal stimuli to collect data about Earth.
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