DOWN WITH MURDER INC. Spies in the sky... Environmental control - Star wars - National Security Agency Big Brothers worldwide digital 3D remote sensing What is remote sensing? If you have heard the term remote sensing before you may have asked, what does it mean? Its a rather simple, familiar activity that we all do as a matter of daily life, but that gets complicated when we increase the scale. As you view the screen of your computer monitor, you are actively engaged in remote sensing. A physical quantity (light) emanates from that screen, which is a source of radiation. The radiated light passes over a distance, and thus is remote to some extent, until it encounters and is captured by a sensor (your eyes). Each eye sends a signal to a processor (your brain) which records the data and interprets this into information. Several of the human senses gather their awareness of the external world almost entirely by perceiving a variety of signals, either emitted or reflected, actively or passively, from objects that transmit this information in waves or pulses. Thus, one hears disturbances in the atmosphere carried as sound waves, experiences sensations such as heat (either through direct contact or as radiant energy), reacts to chemical signals from food through taste and smell, is cognizant of certain material properties such as roughness through touch, and recognizes shapes, colors, and relative positions of exterior objects and classes of materials by means of seeing visible light issuing from them. In the previous sentence, all sensations that are not received through direct contact are remotely sensed. - Remote sensing tutorial - NASA
Posted on: Fri, 28 Nov 2014 13:06:58 +0000
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