Question

i want a note on remote sensing

Answer 1

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, activesensors use internal stimuli to collect data about Earth.
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Answer 2

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.