eHam.net Propagation Page

High Frequency Active Auroral Research Program
HAARP is a scientific endeavor aimed at studying the properties and behavior of the ionosphere, with particular emphasis on being able to understand and use it to enhance communications.

Edit?

Ionosphere Data Archived at National Geophysical Data Center (NGDC)

Edit?

Current Solar Images

Edit?

VOACAP Quick Guide
Guide to using VOACAP, free professional HF prediction software from NTIA/ITS.

Edit?

Solar Influences Data Analysis Center

Edit?

Current Solar Forecast

Edit?

The Solar and Heliospheric Observatory

Edit?

hfradio.org Propagation Page
HF and SWL propagation data and forecasts.

Edit?

World Wide Propagation Conditions

Edit?

KG0VL VHF Aurora Radio Research
 

Edit?

N6RT Propagation Information

Edit?

Solar Terrestrial Activity Report

Edit?

CT1BOH Propagation Page

Edit?

Space Environment Center's Radio User's Page
Solar and geophysical activity, WWV broadcast, space alerts and warnings, auroral activity, D-region absorption, and more.

Edit?

Solar Terrestrial Physics
Data from Earth's upper atmosphere and space environment to the surface of the Sun, and Earth observations from space.

Edit?

NOAA Geomagnetic Field Synthesis Program
Computes the estimated values of Earth's magnetic field, including magnetic declination (D), based on the current International Geomagnetic Reference Field (IGRF).

Edit?

HF Propagation Predictions from the United Kingdom
Table of path openings by band for major cities around the world. The table has been optimised for U.K. radio amateurs.

Edit?

WWV Solar Flux with A and K indexes

Edit?

Real-Time 24 Hour Effective Sunspot Number
 

Edit?

Sunrise/Sunset by U.S. Naval Observatory

Edit?

Sunrise/Sunset tables by NOAA

Edit?

Sunrise, Sunset &Twilight by local Time Zone

Edit?

WA5IYX VHF Propagation Info

Edit?

Near-Real-Time MUF Map
 

Edit?

AD5Q Propagation Forecast Archive
Eleven years of propagation reports from February 1988 to January 1999 focused on DX openings from North America.

Edit?

The Aurora Page
Information, links and images about the "Northern Lights".

Edit?

IPS Radio and Space Services
Australian space weather agency.

Edit?

Solar Terrestrial Dispatch Ham Page

Edit?

Super Dual Auroral Radar Network
SuperDARN is a network of high-frequency radars used to study the Earth's ionosphere.

Edit?

160M Propagation

Edit?

SM6EHY on Propagation (below 10 MHz)
 

Edit?

Radio Line of Sight Plot Server

Edit?

Propagation Studies Committee of the Radio Society of Great Britain
 

Edit?

NB6Z Propagation Tools

Edit?

Grey Line Map
An automatically refreshing, real-time world map showing daylight, twilight (greyline or grayline) and darkness.

Edit?

Space Weather Bureau
Daily monitoring of solar flares, geomagnetic storms, Earth's aurora, and all forms of space weather. sunspots, the sun, solar flares, sun quake, sunquakes

Edit?

Current Hydrogen-Alpha Solar Image
Updated every minute!

Edit?

Basics of Radio Wave Propagation
 

Edit?

NVIS: Near Vertical Incidence Skywave
NVIS, or Near Vertical Incidence Skywave, refers to a radio propagation mode which involves the use of antennas with a very high radiation angle, approaching or reaching 90 degrees (straight up), along with selection of an appropriate frequency below the critical frequency, to establish reliable communications over a radius of 0-200 miles or so.

Edit?

Space Weather Alerts and Displays
Receive alerts via email, fax, or pager regarding x-ray flux, radio burst, geomagnetic warnings, electron flux, proton flux, and stratospheric warming.

Edit?

Millstone Hill Digisonde
Ionogram

Edit?

MSU Solar Physics Group
Of interest to solar keen hams is the YPOP section. Near real time movies of active solar regions in JAVA,GIF or MPEG.

Edit?

William Hepburn's VHF/UHF Tropospheric Ducting Forecast

Edit?

VE1DX's Propagation Primer
Articles on solar terrestial indices, predicting the impact of solar flares, major geomagnetic storms, the Northern Lights and six meters, and seasonal propagation.

Edit?

DXrobot
Automatic real-time AURORA and E-skip warnings via email or mobile phone.

Edit?

ON4AA On-Line HF Propagation Prediction
Learn about your current local HF propagation conditions and obtain a forecast in a snap!

Edit?

AE4RV's Propagation Primer
A Flash movie that describes how HF (shortwave) radio propagation works for beginners.

Edit?

The Aurora Alarm
Free service that sends an email when an aurora is imminent.

Edit?

High Latitude Geomagnetic data
A dynamic collection of high latitude geomagnetic data from 12 Canadian observatories.

Edit?

Amateur Chirp Project (Ionospheric Sounding)
Amateur projects to investigate radiowave propagation - G3PLX's chirp project, ionosonde database, and more...

Edit?

KV5R's Getting Started in NVIS Antenna and Propagation Experimentation
Near-Vertical Incident Skywave propagation is generally considered to be F-layer reflection at angles of 70-90 degrees. It is skywave propagation without the usual skip zone. The purpose of NVIS is to communicate locally and regionally, out to about 300 miles, with moderate power, simple antennas, and no skip zone. NVIS fills in the blank spot between groundwave and low-angle skywave.

Edit?

ON4SKY Amateur Radio Activities
History of amateur radio, propagation analysis and program reviews of VOACAP, WinCAP Wizard, DX Tool Box, and 54 other HF Prop software, portable HF operation, mystery of radials, SWR, transmission lines, basics of aerial antennas, longwire and yagi antennas, Yaesu FT1000MP Mark-V review, Kenwood TS-570D(G) review, principles of amplification, RFI solutions, and lots more.

Edit?

Propfire HF Propagation Stats for Firefox
Propfire is a propagation utility for the Firefox webbrowser. It displays current HF propagation data in your status bar.

Edit?

Solar Cycle 24.com
Solar Cycle 24 / VHF Aurora / amateur radio website.

Edit?

Current Solar-Terrestrial/Propagation Data for Your Website
You can now add the current Solar-Terrestrial/Propagation Data to your web site for free (with no ads). This data is available as a 4k, .gif image 255 X 175, 155 X 300 or 460 X 125 stickers, in multiple color schemes. Now includes calculated propagation conditions using the index and flux numbers obtained.

Edit?

NZ4O Daily Solar, Space Weather & Geomagnetic Data Archive
A daily solar, space weather and geomagnetic data archive. Also an archive of LF/MF/HF/6M frequency radiowave propagation forecasts.

Edit?