6 Steps for a More Successful Trip by Carl Luetzelschwab K9LA

NOAA / Space Weather Prediction Center, Geomagnetic K-indices and Running A-indices, Local Noon Solar Radio Flux, Daily Solar Indices with SSN

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

*One single page* gives you an immediate overview of current shortwave propagation conditions at your location.

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

Nasa MSFC predictions on the behavior of current sunspot cycle.

This page contains dynamically updated propagation information.

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.

Space Weather: Real-Time 24hr Effective Sunspot Number

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.

Long path hf radio propagation is sometimes the best path to work dx, since the shortest path is not always the best path.

A PDF document, used for ham radio training, that cover all aspects of radio wave propagation

Thierry LOMBRY, ON4SKY, develops in several long articles the bascis of propagation. His website includes also a French section dealing with auroras.

Live Ham radio contatcts map. Display curent contacts taken from amateur radio dx cluster into a world wide graphical map. Offer interface with google earth too

Optimal Working Frequencies (MHz) for High Frequency (HF) / Shortwave Radio. By region, updated monthy.

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

Display a table of last 30 days sunspots reports. Prepared by the U.S. Dept. of Commerce, NOAA, Space Environment Center

This is a propagation prediction program tailored to the serious contester

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