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In 1998 an investigation into finding a new way of bringing digital technology to amateur radio was started. The process was funded by a ministry of the Japanese government, then called the Ministry of Posts and Telecommunications, and administered by the Japan Amateur Radio League. In 2001, D-STAR was published as the result of the research. [2]
As the Army incorporated new technologies, the SMODIM added GPS and telemetry and became the core component of live helicopter training systems at all U.S. Army Combat Training Centers (CTCs) with a fielding of over 240 systems. In 1997, the SMODIM was modified to provide a proof of concept for the upgraded AH-64 (D model) Longbow Apache.
Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...
The word of the day is loaded into the radio or its control unit to key the HAVE QUICK system to the proper hopping pattern, rate, and dwell time. [2] The word of the day, time of day and net identifier are input to a cryptographic pseudorandom number generator that controls the frequency changes.
Several hand-held Project 25 radios used around the world. Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide. [1]
Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time digital communications of information of immediate value in the local area. [1] Data can include object Global Positioning System (GPS) coordinates, non-directional beacon, weather station telemetry, text messages, announcements, queries, and other telemetry ...