Propagation in the LF-Band
Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.
This is a highly informative map that can be used by amateur and professional radio communicators to determine maximum usable frequencies for any world-wide path at the indicated UTC (Zulu) time.
Collection of real time solar data by CT1BOH
Automatic 144MHz E-skip Warnings via Email for European Region
The Report and Forecast of Solar and Geophysical Activity is the primary daily report prepared by SEC. It provides a summary and analysis of solar and geomagnetic activity during the previous 24 hours as well as the most recent solar indices. It also provides a forecast of activity and indices for the next 3 days.
This is about Small Antenna types and their properties which can help choosing proper
antenna for high-frequency wireless communications as: two-way radio, microwave short links,
repeaters, radio beacons or wireless telemetry
Global real time ionospheric foF2 map
160 Meter Radio Propagation Prediction Table
High frequecy and VHF radio propagation data, solar and geomagnetic real-time and historic data, sunspot activity reports, 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.
Prepared jointly by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and the U.S. Air Force.
Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities
A dynamic collection of high latitude geomagnetic data from 12 Canadian observatories
Solar data with current solar status, forecast and propagation report
Ionospheric Data Archived at NGDC
Online professional-grade high-frequency (3-30 MHz) propagation predictions
These pages provide general propagation advice for HF communicators. Information available includes inferred global propagation conditions, real time HF fadeout coverage charts, regional ionospheric vertical MUF maps and Hourly Area Prediction charts for Astralia and Asia, Europe and North America
Some test circuits using the ACE-HF System Simulation & Visualization software, about reciprocal propagation on HF bands by NW7US
Automatic e-skip and aurora alerts via email or SMS, it sends also latest dxspots via email.
Solar Flux reports, Current Alerts and Warnings from NOAA, 27 day forcast from NOAA, charts reflecting the past 7 years Solar cycle summary charts from NOAA