![]() ![]() The experiment will use Aug(UTC) as a control date. The objectives are to measure Doppler shifts caused by the effect of space weather on the ionosphere, and to use a specified measurement protocol available to Amateur Radio operators and other citizen-scientists. Some of the questions the research event is hoping to answer include how WWV’s 5 MHz propagation path varies over a given calendar day, and how various measurement techniques for understanding the path variations compare. We plan a careful measurement during the 2024 eclipse.” ![]() “HamSCI’s first attempt at a measurement of these Doppler shifts was during the August 2017 total solar eclipse. “Changes in ionospheric electron density caused by space weather and diurnal solar changes are known to cause Doppler shifts on HF ray paths,” the event announcement says. The event invites radio amateurs, short-wave listeners, and others capable of making high-quality frequency measurements on HF to participate and publish their data to the HamSCI community on the Zenodo open-data sharing site. HamSCI and the Case Amateur Radio Club of Case Western Reserve University (W8EDU) will sponsor a “ Festival of Frequency Measurement” on WWV’s centennial, October 1, from 0000 to 2359 UTC (starting on Monday evening, September 30, in the Americas). If you are a licensed amateur radio operator, contact WW0WWV 28 September through 2 October from the Fort Collins site of WWV. In the custom of shortwave radio, they will post your signal report QSL card, so mail one in. National Institute of Standards and Technology The address there or sent via postal mail to: The engineering staff there will send back the special acknowledgement card printed for the centennial. With that same shortwave radio, listen to WWV on 1 October and send in a reception report. You should get a slow screenful of articles with associated pictures. Click the upper right box marked RSID so that any mode changes will happen automatically. Set fldigi for opmode MFSK-32 and the center frequency cursor to 1500 Hertz. To read the material and see the pictures transmitted, set your shortwave radio for AM, tune the station at the appointed time, and run the audio to as computer running the free-download software fldigi. Elliot took it to commercial shortwave broadcasters such as WRMI Radio Miami International . It provides print journalism for people who have a basic shortwave radio and a computer with a sound card, but no internet access. Kim Elliot’s Shortwave Radiogram began as a program on Voice of America. But HamSCI/CWRU’s Festival of Frequency Measurement, 1 October 2019 UTC (beginning the evening of 30 September in the Americas) is the feature article of the American Radio Relay League’s web site, CQ magazine’s podcast, Ham Talk Live’s podcast #181, and, incredibly enough, The Shortwave Radiogram.
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