Propagation

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Solar X-rays:
Geomagnetic Field:
	From n3kl.org

Solar Information

• 12-hour Boulder-NOAA Magnetometer Monitor - dynamically updated every minute
• Aurora Sentry
• Geomagnetic and Solar Indices - (auto-refresh every 5 minutes)
  - NOAA / Space Weather Prediciton Center, Geomagnetic K-Indicies & Running A-Indicies...
• Latest Solar Events - [Solar Soft]
• Solar Ham (formerly Solar Cycle 24) - an excellent site by: VE3EN
• Solar Resource Page - [WM7D dot Net]
• Solar-Terrestrial Activity Report - [DX-Listeners' Club]
• Space Weather - News and information about the Sun-Earth environment
• W4/VP9KF - Propagation

Propagation Charts

• D-Region Absorption Prediction Map (a.k.a., Radio Blackout) - (auto-refresh: 60 seconds)
• Near-Real-Time F2-Layer Critical Frequency (foF2) Map - Australian Space Wx Agency
• Near-Real-Time F2-Layer Critical Frequency (foF2) Map - (auto-refresh every 5 minutes)
• Near-Real-Time F2-Layer Height Maximum (hmF2) Map - (auto-refresh every 5 minutes)
• Near-Real-Time Maximum Useable Frequency (MUF) Map - (auto-refresh every 5 minutes)
• Near-Real-Time Map of Solar Zenith Angles - (auto-refresh every 5 minutes)

Propagation Plots

• DX Sherlock - vhfdx.info
  ... realtime plots of DX-cluster data. Site includes web interface to "Send a spot to the DX-Cluster." (Map Automatic refreshes every 3 minutes.)
• The Prop NET Project
  ... propagation tracking! The charts on this web site reveal what RF communication circuits are available (and NOT available), in real time and without the inaccuracy of human assessment.
  ... providing station performance assessment to others! Operators who can't seem to get a response to their "CQ's" can "ping" a PropNET station (by sending a PropNET formatted transmission) and see if they are reported by a PropNET participant (along with an IMD report) on www.PropNET.org.
• PSK Automatic Propagation Reporter
  ... based upon reception reports of stations calling CQ.
• WSPRnet Weak Signal Propagation Reporter Network
  The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions.

Propagation Prediction Tools

• VOACAP Online
  High-Frequency (HF) (3-30 MHz) Point-to-point propagation predictions.

Background Information

• From: NOAA / Space Weather Prediction Center
  • Solar-Terrestrial Terms
  • NOAA Space Weather Scales
    - Geomagnetic Storms; Solar Radiation Storms; Radio Blackouts
• From: The U.S. Naval Post Graduate School
  • Electromagnetic Radiation (EM)
    • What is electromagnetic radiation - A wave?
    • What is electromagnetic radiation - A particle?
    • Basic EM Concepts
    • Representing EM Radiation
    • The Electromagnetic Spectrum
    • Modes of Transmission
    • Introduction to Refraction - What causes EM waves to bend?
    • Bounded Electron Refraction
    • Free Electron Refraction
  • HF and Lower Frequency Radiation
    • Introduction
      
    • The Ionosphere and the Sun
      
    • Choosing the Right Frequency
      
    • Propagation Models
      
    • Space Weather
      
    • Summary and Additional Resources
      
• HAARP (High Frequency Active Auroral Research Program)
  
• The Basics of VHF and UHF Signal Propagation
  
• HF Ionospheric Radio Signal Propagation
• HF Radio Wave Propagation (Part 1)
  In this video Tyler Pattison N7TFP explains how radio waves travel around the world via radio 'skip' or sky-wave propagation.
• Ionospheric HF Radio Propagation Theory in a Nutshell
  An explanation by Rich Johnson, AE3C
• Near Vertical Incident Skywave (NVIS) Propagation Concept
  U.S. Army Field Manual FM 24-18 Appendix M
• The Sun, the Earth, the Ionosphere; What the Numbers Mean...
  An explanation by Carl Luetzelschwab, K9LA
• Understanding LF and HF Propagation - free eBook
  by G0KYA and G3NYK of RSGB's Propagation Studies Committee

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DX Spots

DX Summit
HF	1.8 MHz	3.5 MHz	5 MHz	7 MHz	10 MHz	14 MHz	18 MHz	21 MHz	24 MHz	28 MHz
VHF plus	50 MHz	144 MHz	430 MHz	1.2 GHz	10 GHz
Misc.	Beacon		Digital		IOTA	Mobile		QRP	Satellite

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Live & Recorded Audio

• Dallas, TX
• 13-Miles North of Salt Lake City, Utah [Live] or [Recorded DX]
• WebSDR.org
  A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously.

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Last Modified: Monday, 16-Jan-2012 09:33:13 EST