Solar X-rays: Solar Xray Status
Geomagnetic Field: Geomagnetic Field Status

dhs threat level

Basics of Radio Wave Propagation

Sun, 04/13/2014 - 11:00pm
Exaustive introduction to radio wave propagation, includes a very detailed glossary on common propagation terms, composed by AE4TM.

NASA Sunspot Cycle Predictions

Sun, 04/13/2014 - 11:00pm
Nasa MSFC predictions on the behavior of current sunspot cycle.

Troposcatter propagation

Sat, 04/12/2014 - 11:00pm
Introduction to troposcatter or tropospheric scatter propagation using the troposphere

A and K index in propagation

Sat, 04/12/2014 - 11:00pm
The understanding of the A and K indexes will become a very important issue when one begins serious HF operation.

HF Propagation Primer

Sat, 04/12/2014 - 11:00pm
Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

Current solar images

Sat, 04/12/2014 - 11:00pm
Images from the Solar Dynamics Observatory and Atmospheric Imaging Assembly

VOACAP Online

Fri, 04/11/2014 - 11:00pm
Online professional-grade high-frequency (3-30 MHz) propagation predictions

Geophysical Alert Message wwv.txt

Thu, 04/10/2014 - 11:00pm
Broadcast via WWV and WWVH at 18 and 45 minutes past the hour. This message is updated every 3 hours. Reports current Solar-terrestrial indinces, Solar Flux, A-index, K-Index, forecast for space weather storms. Prepared by the US Dept. of Commerce, NOAA, Space Environment Center

Long Path Propagation

Thu, 04/10/2014 - 11:00pm
Long path hf radio propagation is sometimes the best path to work dx, since the shortest path is not always the best path.

Tropospheric Ducting Forecast

Thu, 04/10/2014 - 11:00pm
William Hepburn's Daily Tropospheric Ducting Forecast.

Operating NVIS

Thu, 04/10/2014 - 11:00pm
Near Vertical Incidence Sky Wave (NVIS) Propagation, PPT presentation by Marc C. Tarplee, Ph.D. N4UFP

Radio-Wave Propagation

Wed, 04/09/2014 - 11:00pm
KC¤DMH radio wave propagation notes with illustrations

Aurora Page by MichiganTech

Wed, 04/09/2014 - 11:00pm
A source for Information, links and images about the \"Northern Lights\" on-line since the Web began

Solar Terrestrial Activity Report

Wed, 04/09/2014 - 11:00pm
Solar data with current solar status, forecast and propagation report

Solar Cycle Progression

Wed, 04/09/2014 - 11:00pm
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

Last 30 Days Solar Data

Wed, 04/09/2014 - 11:00pm
Display a table of last 30 days sunspots reports. Prepared by the U.S. Dept. of Commerce, NOAA, Space Environment Center

Predicted Sunspot Numbers and radio flux

Wed, 04/09/2014 - 11:00pm
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center

Solar Region Data - SunSpots

Wed, 04/09/2014 - 11:00pm
Solar Region Data Current Regions with Sunspots Summary, an useful tool for predictions

Current Optimal Frequency Charts

Wed, 04/09/2014 - 11:00pm
Optimal Working Frequencies (MHz) for High Frequency (HF) / Shortwave Radio. By region, updated monthy.

WM5R Long Delayed Echoes

Tue, 04/08/2014 - 11:00pm
WM5R presentation of Introduction to Long-delaye echoes and theories among this propagation effect.