Propagation Tools and Resources
Modern ham radio operators have access to an extraordinary range of propagation monitoring tools — real-time spotting networks, automated propagation beacons, sophisticated modelling software, and live solar data feeds that were unimaginable a generation ago. Knowing which tools to use for which purpose, and how to interpret what they show, is as important as understanding propagation theory. This page is your reference for the best propagation resources available to ham radio operators.
| Tool | URL | What It Shows | Best For |
|---|---|---|---|
| PSKReporter | pskreporter.info | Live FT8/FT4/WSPR reception reports on world map | Band-by-band real-time propagation check |
| Reverse Beacon Network | reversebeacon.net | Automated CW/digital spots from SDR stations worldwide | HF propagation — CW activity tracking |
| DXWatch | dxwatch.com | Live DX cluster spots by band and entity | What DX is being worked right now |
| DX Summit | dxsummit.fi | DX cluster with filtering | Alternative to DXWatch — European focus |
| WSPRnet | wspr.net | WSPR beacon reception worldwide map | Antenna performance and band monitoring |
| SolarHam | solarham.net | Solar data, X-ray flux, aurora, geomagnetic | Complete solar weather dashboard |
| Hamqsl | hamqsl.com | Solar flux panel widget — embeddable | Quick SFI/A/K-index check |
VOACAP Online
VOACAP (Voice of America Coverage Analysis Program) at voacap.com is the standard HF propagation prediction tool. Enter your transmitter location, target location, antenna type, transmit power, and the tool generates hour-by-hour predictions for all HF bands showing predicted signal strength and reliability. VOACAP uses decades of ionospheric data to produce statistically valid median predictions — it tells you what conditions are likely on average, not what they are right now. Use it for planning operating sessions, deciding which band to try for a specific path, and understanding general seasonal propagation patterns. VOACAP Online also supports area coverage maps showing which parts of the world are likely reachable from your station on a given band at a given time.
DX Atlas and HRDLog
DX Atlas is a commercial software program for Windows that combines a world map with propagation prediction, grey line display, and DX cluster integration. It is widely used by serious DX operators for its intuitive interface and comprehensive features. HRDLog.net provides a free online alternative with grey line maps, propagation overlays, and real-time cluster integration. Both tools help visualise the geographic dimension of propagation — not just whether a band is open, but which specific parts of the world are currently accessible and why.
NOAA Space Weather Prediction Center
The primary authoritative source for solar and geomagnetic data is the NOAA Space Weather Prediction Center at swpc.noaa.gov. It publishes real-time solar flux, daily A-index, 3-hour K-index, X-ray flux, aurora oval forecasts, and geomagnetic storm watches and warnings. The 27-day outlook provides forward-looking solar activity estimates. For ham radio, the most useful daily check is the SFI (Solar Flux Index), the current K-index, and any active geomagnetic storm watches. Bookmark the "Latest Solar Data" page for a one-stop dashboard.
WWV and WWVH broadcasts
WWV (Fort Collins, Colorado) broadcasts on 2.5, 5, 10, 15, and 20 MHz, and WWVH (Hawaii) broadcasts on 2.5, 5, 10, and 15 MHz. At 18 minutes past each hour, WWV broadcasts a propagation bulletin with the current solar flux, A-index, and geomagnetic conditions. At 45 minutes past each hour, WWVH provides a similar bulletin. Listening to WWV on 10 MHz is also itself a propagation indicator — if you can hear WWV clearly, 10 MHz propagation from Colorado to your location is working, which gives you a real-world data point for band conditions.
| Tool | URL | What It Shows |
|---|---|---|
| DXHeat | dxheat.com | VHF/UHF/microwave DX cluster spots on map |
| DX Sherlock | dxsherlock.com | Sporadic E and VHF propagation tracking |
| Hepburn tropo | hepburn.es/e | Tropospheric ducting forecast maps |
| ON4KST chat | on4kst.com | Real-time EME and VHF/UHF scheduling chat |
| NOAA aurora oval | swpc.noaa.gov | 30-minute aurora oval forecast |
| SpaceWeatherLive | spaceweatherlive.com | Real-time geomagnetic data and aurora alerts |
What is the single most useful propagation tool for an HF operator?
PSKReporter.info is the most immediately useful tool for understanding what is happening on HF right now. Select a band, zoom in on the map, and you see which stations are being heard by whom in real time. If you see multiple stations from Japan being decoded in the US on 15m, that band is open to Japan right now — no interpretation required. It updates every few minutes and covers all HF bands. For most operators, PSKReporter is the propagation tool they check most frequently.
How do I set up WSPR to monitor propagation automatically?
Install WSJT-X and select WSPR mode. Configure your callsign, grid square, and audio interface. Enable two-minute WSPR transmission periods and set the transmit percentage to 20% (transmitting 1 out of every 5 periods, receiving the other 4). WSJT-X automatically uploads your received spots to WSPRnet.org. Leave the software running and check WSPRnet periodically to see where your signal is reaching. Over a few days, you will build a picture of your antenna's propagation performance and your local noise environment across multiple HF bands.
Are there mobile apps for propagation monitoring?
Yes — several good apps aggregate propagation data for mobile use. HamSatDroid and DXToolbox (iOS/Android) provide solar indices, cluster spots, and propagation information. The official NOAA Space Weather app provides solar data. For 6m and VHF propagation, the DX Sherlock mobile interface works well. PSKReporter has a mobile-friendly web interface. For real-time DX cluster spots, ClubLog mobile and HamRadio Deluxe Remote both work on mobile devices with appropriate subscriptions.