Satellite+communication

=Satellite Imagery= Satellite imagery consists of photographs of Earth or other planets made by means of artificial satellites. Satellite images have many applications in meteorology, agriculture, geology, forestry, biodiversity conservation, regional planning, education, intelligence and warfare. Images can be in visible colours and in other spectra.

A disadvantage of using satellite imagery is that resolution will be high as the area of Earth is so large, therefore satellite databases must be huge and image processing can be time consuming. Also the sensor used and weather conditions can affect the image quality, for instance its hard to obtain images of cloud covered areas such as mountains. Privacy concerns may also arise for those people who don't want their property to be shown from above.



Tagging
RFID Tagging.

"Electronic tagging is the process of attaching a device to something to track its location and status."

These devices can come in different forms such as bracelets, anklets, dog tags or microchips. Electronic Tagging can be used in farming to track animal movement and it can also be used to track people such as criminals under house arrest. This type of tagging is based around GPs and RFID (Radio frequency identification)

**Remote sensing devices**
"Remote sensing is the acquisition of information of object or phenomenon, without making physical contact with the object" - Wikipedia


 * 1) Magnetic Resonance Imaging (MRI)
 * 2) Positron Emission Tomography
 * 3) X-Radiation

"MRI is a medical imaging technique used in radiology to visualize detailed internal structures. MRI makes use of the property of nuclear magnetic resonance (NMR) to image nuclei of atoms inside the body."



"Positron emission tomography (PET) is a nuclear medicine imaging technique that produces a three-dimensional image or picture of functional processes in the body."



"X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers . Hard X-rays can penetrate solid objects, and their most common use is to take images of the inside of objects in diagnostic radiography and crystallography. As a result, the term //X-ray// is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. By contrast, soft X-rays hardly penetrate matter at all; the attenuation length of 600 eV (~2 nm) X-rays in water is less than 1 micrometer"



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