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AOL Mail offers secure and personalized email with features like AOL Mail, news, and weather for free. You can also access your email on the go with an iOS & Android app and get help from experts.
VHF Data Link (VDL) is a means of sending information between aircraft and ground stations using VHF band. VDL Mode 2 is the main version of VDL for CPDLC and has 12 channels in Europe, while VDL Mode 4 is used for ADS-B and other applications.
Ugreen is a Shenzhen-based company that produces USB hardware, audio equipment, mobile accessories and other electronics. Founded in 2012 by Zhang Qingsen, it has products sold worldwide and is listed on the Shenzhen Stock Exchange.
A radar beacon (racon) is a device that returns a distinctive signal when triggered by a radar, providing range, bearing and identification information. Learn about the principle of operation, the characteristics, the applications and the proposal for enhanced RACON.
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IFF is a combat identification system that uses a transponder to respond to radar signals and identify friendly or hostile forces. Learn about the history, types and modes of IFF, and how it works with different frequencies and formats.
A pair of modest earthquakes rattled Southern California on Saturday morning, with epicenters in Ontario. The earthquakes, of magnitudes 3.5 and 3.9, occurred within about a half hour of each other.
Learn about the different modes of aviation transponders, which transmit information to radar systems and ADS-B receivers. Mode C provides the aircraft's pressure altitude, which is usually combined with Mode 3/A to provide a 4-digit octal code and altitude as Mode A and C.