remote sensing
acquisition of information about an object or phenomenon without making physical contact with the object, especially the Earth
water remote sensing
studies the color of water through the observation of the spectrum of water leaving radiation. Water quality monitoring by remote sensing & close-range instruments has obtained considerable attention since the founding of EU Water Framework Directive
sonar
technique that uses sound propagation
photogrammetry
science of making measurements from photographs
Earth remote sensing
remote data collection on the environment, geology, climate, and other characteristics of the Earth
remote sensing software
a software application that processes remote sensing data