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Radar is used to detect the presence of moving or stationary objects at a distance by utilizing radio waves. It is also used to detect the speed of a moving object, to identify the type and bearing of an aircraft and to create detailed topographic maps.


Some types of weather maps are temperature, wind, pressure, radar, jet stream, satellite and front maps. These different weather maps provide information on the prevailing meteorological conditions of a specific location. For example, a temperature map can include the v...


The lines commonly seen on weather maps are called isobars. They are used to show areas that have the same barometric pressure, either at a given time or on average over a certain period.


Learn to read a weather map by first learning what the various weather symbols mean, and understanding how the maps are set up. Surface charts are the maps that typically appear on television and in the newspaper.


In 1886, Heinrich Hertz demonstrated that radio waves that hit objects are reflected, and in 1897, the first accidental radar detection of a ship was performed by Alexander Popov. In 1904, Christian Hulsmeyer made a practical demonstration of intentional detection of me...


Live air traffic radar works by picking up on satellite transmissions of each aircraft's location. Transponders located on each aircraft transmit signals to the radar's receiver that then compiles the location data and makes it available for public consumption.


Sites that offer free live airport radar tracking include FlightAware.com, Flightradar24.com, RadarBox24.com and RadarVirtuel.com. Each of these websites allow visitors to customize the area viewed and watch specific airport traffic patterns.