This map shows real-time radio propagation from stations operating on 11 bands between 1.8 and 54 MHz in the amateur radio service. The display shows worldwide activity from the last 15 minutes and is automatically updated about every minute.

Below you will find charts showing the live conditions around the Earth for radio propagation as well as atmospheric conditions that can affect Ham Radio usage depending on frequency. These are great tools for HF and knowing what the conditions are if you plan on trying to make contacts on a particular day/time.

One of the best tools for understanding HF (high-frequency) propagation is the online map (chart) shown below. It is a graphical representation of MUF within a 3000-kilometer range, allowing amateur radio station operators to estimate the best frequencies and …

Continually updated ham radio propagation frequencies, ionograms, and geomagnetic and solar information

HF Band Conditions maps are powerful tools used by amateur radio operators, shortwave listeners, and radio enthusiasts to monitor and predict the state of high-frequency (HF) radio propagation. These maps provide valuable information …

HF propagation conditions can be simulated using radio propagation models, such as the Voice of America Coverage Analysis Program, and realtime measurements can be done using chirp transmitters. For radio amateurs the WSPR mode provides maps with real time propagation conditions between a network of transmitters and receivers. [ 10 ]

6 天之前 · HF Radio Propagation Basics: Understanding the core principles of HF radio waves and ionosphere interactions. Skywave Propagation : How radio waves reflect off the ionosphere for long-distance communication.

2014年11月14日 · High frequency and VHF radio propagation data, solar and geomagnetic real-time and historic data, as well as forecasts. A comprehensive propagation resource compiled by Tomas Hood, editor of the propagation columns of CQ, CQ VHF, Popular Communications, and Monitoring Times magazines.

2024年12月25日 · Clickable overview of solar activity influencing HF propagation on Earth. Onset times are measured from the occurrence at the Sun’s surface. The mathematical symbol ∩ stands for intersection.

3 天之前 · Maximum Usable Frequency for Sky-Wave Propagation. Inspiration for this site, along with XML data, is courtesy N0NBH. Thanks! Site by W5MMW. Please send me an email if something doesn't look right.