Resources

DX.QSL.NET Propagation - This page contains dynamically updated propagation information.

WM7D Solar Resources - 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

Basics of Radio Wave Propagation - Exaustive introduction to radio wave propagation, includes a very detailed glossary on common propagation terms, composed by AE4TM.

Tropospheric Ducting Forecast - William Hepburn's Daily Tropospheric Ducting Forecast.

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

PA1SIX six meter propagation - F2 and TE propagation on 6 meter

Radio-Wave Propagation - KC¤DMH radio wave propagation notes with illustrations

Introduction to HF propagation - An Introduction to High Frequency Radio Propagation by IPS Radio & Space Service

Radio Propagation - Spread Spectrum Scene. Radio Propagation notes, with downloadable files.

Introduction to VHF Propagation - Understanding basic VHF and UHF propagation, eskip, Backscatter, Meteor Scatter and more

High Frequency Propagation Models - Institute for Telecommunication Sciences High Frequency Propagation Models

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

Sunrise, Sunset, Moonrise, Moonset, and Twilight Report - U.S. Naval Observatory, Sunrise, Sunset, Moonrise, Moonset, and Twilight ,Moon Illumination, Positions of the Sun and Moon , Eclipses

HF Propagation Primer - Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

Check DX Propagation with Beacons - W0RW article that guide you to using beacons to determine dead bands or upcoming propagation openings.

VHF UHF Microwave Radio Propagation - Notes on radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission

Radio-Wave Propagation - KC¤DMH radio wave propagation notes with illustrations

Radiowave Propagation Center - 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.

Real-Time Space Weather - Great propagation resources page assembled by David Rosenthal, N6TST

Short Wave Propagation - Introduction to shortwave propagation

Shortwave Propagation - Description of shortwave propagation on shortwaves, refers to those wavelengths which occur with frequencies from about 3 to 30 mHz, or 100 to 10 meters

Small Antennas for High Frequencies - 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

Solar Flux report - The latest flux report from louisxiv Canada

Solar Glossary - Glossary of solar and terrestrial terms, by the Space Environment Center

Space Weather Reporting Priority listing - Tons of info for Amateur Radio operators who are looking for solar and space weather data, and links to other sites that provide more detailed data.

Stanford Solar Center - Providing solar on-line activity resources for the joy of solar science exploration

Sunrise, Sunset, Moonrise, Moonset, and Twilight Report - U.S. Naval Observatory, Sunrise, Sunset, Moonrise, Moonset, and Twilight ,Moon Illumination, Positions of the Sun and Moon , Eclipses

Sunspot answer book - Mr Sunspot's Answer Book National Solar Observatory Sacramento.

The 160-Meter Band: An Enigma Shrouded in Mystery - Lights on why 160 meters is so unpredictable and what’s being done to reveal its secrets

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

The Ionosphere - The Ionosphere (simplified) by WB8IMY, an useful article for the HF novice

The ionosphere at VHF - Influence of the ionosphere on the EME signals by EAVQ

The PropNET Project - 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.

Topband - 160 meter Radio Propagation - Here you will find a variety of tools which will hopefully help you improve your chances of succeeding at Topband (160 meter) DX.

Tropospheric Ducting Forecast - William Hepburn's Daily Tropospheric Ducting Forecast.

Tropospheric propagation - Article about tropospheric propagation and the way in which radio signals at VHF and above propagate over greater distances than strictly line of sight in the troposphere

Understanding propagation numbers - Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities

Understanding Solar Indices - Solar Flux, Geomagnetic Activity indexes and interpreting their relation

VHF UHF Microwave Radio Propagation - Notes on radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission

VK2KRR DUCT Info - Tropospheric Ducting information that has been researched at Station VK2KRR.

VK9LA’s Amateur Radio Propagation - Selected articles about propagation from his monthly Propagation column in WorldRadio

VOACAP Quick Guide - A Quick Guide to using VOACAP - Point-to-Point High-Frequency Ionospheric Communications Analysis and Prediction Program

Waveguide basics tutorial - Summary, tutorial about the basics of what is a waveguide and the basic waveguide theory.

What the numbers mean in propagation - What the Numbers Mean, and Propagation Predictions--a brief introduction to propagation and the major factors affecting it.

WM7D Solar Resources - 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

World Time - Sunset - With this online tool you can show in real time zones of the world currently having sunset

WWV -- SEC's Geophysical Alert Message - WWv explained. Document explaining the Geophysical Alert Message file format available on the web, and the SEC Geophysical Alert description