swmopacket.org

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

Two modes of propagation at 50MHz E-layer & Sporadic-E by Ken G4IGO

Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.

Boulder K-Indices, Planetary K-Indices, 10.7 cm solar radio flux updated every 30 minutes by Canada’s Space Weather center

Automatic e-skip and aurora alerts via email or SMS, it sends also latest dxspots via email.

Lights on why 160 meters is so unpredictable and what’s being done to reveal its secrets

This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space.
The map shows the radio auroral zones as green bands near the northern and southern poles.

By Ken Larson KJ6RZ, a complete guide to understanding soloar indices and values.

6 Meter DX Map with reports from the VE7CC DX Cluster

Current status, prediction, solar weather for the solar cycle 24 by VE3EN

The past and future of the Sun’s solar cycle and possible impact on the Earth’s climate.

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.

The charts on this page depict the progression of the Solar Cycle. The charts and tables are updated by the Space Weather Prediction Center monthly using the latest ISES predictions

PropNET is an ad-hoc 2-way (and potentially, "more-way") RF-based digital communication network whose activity is reported on the Internet. As participating stations periodically ID and exchange data, they report their activity to an Internet data-collection hub for presentation through this web site.

Army Field Manual 24-18 Appendix M with Graphics