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Hello, I am looking for someone to write an article on Principles of Remote Sensing. It needs to be at least 1250 words. When passive remote sensing is applied, the source used is generally based on natural radiation which is being emitted and reflected by the object of interest as well as the surrounding region. Generally reflected sunlight is used as the most common source for passive remote sensing. The remote sensors employed for passive remote sensing are film photography, charge-coupled devices, radiometers, and infrared sensors. On the other hand, when active remote sensing is applied, energy is emitted towards the object of interest as well as the surrounding regions. The amount of radiation that is reflected back or backscattered from the object of interest is then measured using sensing techniques. Typical examples of active remote sensing include RADAR and LiDAR.