HF Radio Resource Center
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Welcome to the HF Radio Resource Center. This page is the focal point for all resources related to HF radio communications in EA4FSI-28T1 web site. Use the options on the left frame to navigate. All the contents are available in Spanish and some of them also in English. If you want to contact the author, please use this form.
Esta página también está disponible en Español (this page is also available in Spanish).
HF Antennas
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Section devoted to the design, building and simulation of HF antennas. The simulations are performed using 4Nec2, MMANA-GAL and HFAnt. Construction of magnetic loop antennas for reception and transmission in the HF band.
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HF & Space Weather Panel
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The HF Panel offers a compilation of resources about the HF propagation status in real-time: space weather, ionosphere and magnetosphere status, measurementss of MUF and foF2 for HF radio links, ionospheric absorption, aurorae, grey-line propagation, optimal working frequencies and special bulletins. The panel is available in versions for PC and mobile devices.
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HF & Space Weather Panel Manual (ESP)
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An user's Manual of the EA4FSI-28T1's HF & Space Weather Panel. This Manual is also oriented to serve as support material to study the propagation in the HF band.
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HF Radio Communications Glossary (ESP)
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A collection of terms related with radio communications in the HF band. The collection has currently 201 terms.
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NVIS Communications in the HF Band
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Article about the Near Vertical Incident Skywave (NVIS) HF propagation mode, used at great length in emergency and tactical communications. The article was published in the Spanish Amateur Radio Union (URE) magazine, in november 2008.
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Daily Evolution of the Ionosphere
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Educational video about the evolution of the different layers of the ionosphere during a whole day, analyzing data gathered by the ionospheric sounding station at El Arenosillo (Huelva, Spain), a facility belonging to the Spanish National Institute of Aerospace Technology (INTA).
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Risks derived from the Space Weather (ESP)
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Report presented in November 2010 to the Spanish General Directorate of Civil Protection and Emergencies (DGPCE), on the occasion of the Technical Congress on Space Weather. The article provides a description of the Space Weather phenomena and an analysis of the risks for people and several technological systems, among them the HF radio communication systems. The article also provides a description of the observation and early warning systems currently available in several countries.
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W6ELProp Manual (ESP)
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An user's manual of W6ELProp, the HF link calculation software developed by Sheldon C. Shallon (W6EL). Includes practical examples.
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PropView Manual (ESP)
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An user's manual of PropView, a HF link calculation software based on the IONCAP model.
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HF Propagation Forecasts by EA3EPH (ESP)
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Works about propagation calculations and forecasts in the HF band developed by Alonso Mostazo Plano (EA3EPH), using his software "Sondeo".
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Notes on Antenna Simulation using NEC-2 (ESP)
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Notes and recommendations about antenna simulations using software based on the NEC-2 algorithm, developed by the Lawrence Livermore National Laboratory. The recommendations and rules of design have been compiled both from the manuals of some programs and from technical articles about antenna simulation.
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Ismael Pellejero - EA4FSI |