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  2. Amateur radio propagation beacon - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_propagation...

    An amateur radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on LF, MF, HF, VHF, UHF, and microwave frequencies. Microwave beacons are also used as signal sources to test and calibrate antennas and ...

  3. WSPR (amateur radio software) - Wikipedia

    en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

    It is a protocol, implemented in a computer program, used for weak-signal radio communication between amateur radio operators. The protocol was designed, and a program written initially, by Joe Taylor, K1JT. The software code is now open source and is developed by a small team.

  4. Radio beacon - Wikipedia

    en.wikipedia.org/wiki/Radio_beacon

    The most basic radio-navigational aid used in aviation is the non-directional beacon or NDB. It is a simple low- and medium-frequency transmitter used to locate airway intersections and airports and to conduct instrument approaches, with the use of a radio direction finder located on the aircraft.

  5. List of amateur radio software - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_software

    MacLoggerDX is a full-featured amateur radio contact logger for macOS with Transceiver control, Rotor control, Callbook lookup, QSL handling (Hardcopy / LoTW / eQSL / Club Log), DX Cluster and spotting, and basic contesting support.

  6. Automatic Packet Reporting System - Wikipedia

    en.wikipedia.org/wiki/Automatic_Packet_Reporting...

    APRS beacon transmitter with GPS receiver. 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]

  7. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Automatic_Direction_Finder

    Radio transmitters for air and sea navigation are known as beacons and are the radio equivalent to a lighthouse. The transmitter sends a Morse Code transmission on a Long wave (150 – 400 kHz) or Medium wave (520 – 1720 kHz) frequency incorporating the station's identifier that is used to confirm the station and its operational status.

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