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MAIN PROPAGATION MENU:

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- What's a CME?

Is HF Propagation Reciprocal? - New How-To

De-mystifying HF Radio Propagation and Modeling - New How-To

NEW! ACE-HF propagation software Version 2.05: THIS IS THE VERY LATEST! Forecasting and modeling for Ham as well as for SWL operators. CHECK IT OUT.

This website is kept alive by Tomas (NW7US), out of "spare change" (which there's not always enough of), and, by the kind, helpful people who visit this website. If you are able to help me keep this website up and running, please: help me keep this site running:

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- SWIM PC Software
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Want to learn about Propagation and Space Weather? - Take the STD Space Weather Education Course, today!

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To view the best working frequency by time, check out:

+ Current Optimal Frequencies

If you are using software utilities such as Ace-HF, that require a "smoothed" sunspot number, or flux index, use the data found here:

+ Predicted SMOOTHED Sunspot Number And Radio Flux Values with Expected Ranges

+ The eAlert (email) Propagation Reports

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SALE! BUY NOW, AND GET THE END-OF-YEAR SPECIAL PRICE! SEE BELOW.

Solar Terrestrial Dispatch (STD) is a world-leader in space weather forecasting services, as was demonstrated in late October and early November 2003 (Oler, C., "Prediction Performance of Space Weather Forecast Centers during the Extreme Space Weather Events of October and November 2003," published in the peer-reviewed scientific journal "Space Weather" by the American Geophysical Union in 2004). A copy of this paper is available here.

STD expertise is used to provide high-quality space weather forecast services to many electrical power companies across North America, guidance to spacecraft operators and consultation to many others.

STD has developed a special space weather course designed to teach individuals without any background how to predict space weather (see below). The STD Space Weather Course was the recipient of the Study-Web Academic Excellence award.

The course is available on-line as a small group of downloadable Adobe Acrobat Reader documents comprising over 630 pages of printed material (for sample pages, click here). You can therefore choose to study the material on your computer or print it out for study.

The course also includes the STD workhorse Space Weather Information Monitor (SWIM) software, which is the most comprehensive space and weather information monitor in the world. The course also includes a copy of the STD Aurora Monitor software package, as well as the STD's popular Proplab-Pro HF Radio Propagation Laboratory software. All software products are optional elaborate tools that will contribute to your application of the knowledge obtained through this course.

Read more details about all the features of this special course, below.

Purchasing the Course

Please choose one of the following course packages.
  • Purchase: The course alone (no software), delivered over the Internet.

      Now: $200.00 - normally $250 USD
    • Pay Online by clicking the PayPal button:
      Note: This is only the course - no software. You are paying for the knowledge and content.

  • Purchase: The course with all software, delivered over the Internet.

    • SALE! BUY NOW AT $270.00 - compare to the normal price: $300 USD

    • Includes software: SWIM, STD Aurora Monitor, and PropLab-pro Version 3.0 (NEW!)
    • Pay Online by clicking the PayPal button:
      Note: You are paying for the knowledge and content of this course, PLUS GETTING THE SOFTWARE, TOO!

  • Purchase: The course with all software, delivered on CDROM.

    • SALE! SAVE HUGE, BUY NOW AT $315 - compare to the normal price: $350 USD

    • Includes software: SWIM, STD Aurora Monitor, and PropLab-pro Version 3.0 (New!)
    • Pay Online by clicking the PayPal button:
      Note: You are paying for the knowledge and content of this course, PLUS GETTING THE SOFTWARE, TOO - delivered by CDROM!



A list of the topics covered in this home-study course include:
  • The Sun
    • Basics of the Sun
    • Sunspots
      • Types of Sunspots
      • Sunspot Magnetic Fields
    • Solar Radiation and Radio Emissions
    • Solar Cycles
    • Techniques for Modelling Solar Cycles
    • Sources of Information and Imagery
  • Interplanetary Space
    • The Solar Wind
    • Magnetic Fields
    • Heliospheric Current Sheet
    • Solar Sector Structures
  • The Earth
    • Magnetosphere
      • The quiet magnetosphere
      • The disturbed magnetosphere
      • Understanding Magnetic Indices
      • Magnetic Storms
        • Sudden Storm Commencements (SSCs)
        • Gradual Storm Commencements
      • Geomagnetically Induced Currents (GICs)
        • Effects on Electrical Hydro Systems
        • Effects on Other Long Conductors
    • Ionosphere
      • Formation of Ionospheric Layers
      • Factors Affecting Ionospheric Layers
  • Solar Disturbances
    • Transient Solar Coronal Mass Ejections (CMEs)
      • Types and Structures of Coronal Mass Ejections
      • Understanding the Importance of CME Structures
      • Inferring CME Structures from Available Solar Data
      • Coronal Mass Ejection Detection Methods
      • Using IMPACT (software) to Aid in CME Disturbance Predictions
      • Solar Cycle Dependencies
    • Solar Flares
      • Basic Nature of Flares
      • Types of Flares
      • Flare Rating Systems
      • Significance of Proton Flares
      • Ground Level Events (GLEs)
      • Fast Transit Events
      • Interpreting Magnetograms
      • Determining Magnetic Shear and Flare Susceptability
      • Solar Flare (and Proton Flare) Prediction Techniques
      • Solar Flare Related Coronal Mass Ejection Prediction Techniques
      • Sources of Solar Flare Information
    • Solar Coronal Holes
      • Coronal Hole Basics
      • Recurrence
      • Solar Cycle Correlations
      • Associations with Near-Relativistic Electrons
      • Coronal Hole Related Disturbance Prediction Techniques
    • Filament Eruptions
      • Filaments and Prominences
      • Eruptive and Non-Eruptive Activity
      • Filament-Associated Coronal Mass Ejections
      • Filament-Related Disturbance Prediction Techniques
  • Auroral Activity
    • Basic Theory of the Northern/Southern Lights
    • Behavioral Characteristics of the Auroral Ovals
    • Sensitivity to Solar Disturbances
    • Affects on Satellite Health and Radio Communications
    • Mathematical Models of the Auroral Zones
    • Auroral Activity Prediction Techniques
    • Information Sources
  • Conditions Affecting Satellite Health
    • Atmospheric Drag
    • Surface Charging Anomalies
    • Deep Dialectric Charging Anomalies
    • Interplanetary Shocks
    • Magnetopause Crossings
  • Postulated Sun/Earth Climate Connections
    • Possible Long-Term Climatic Trends
      • Rainfall
      • Temperatures
      • Atmospheric Pressure
      • Storm Tracks
      • Ozone Correlations
    • Possible Short-Term Meteorological Trends
      • Pressure and Winds
      • Lightning
      • Storm Systems
      • Ozone Responses
  • Radio Propagation
    • Basic Theory (Non-Technical)
      • Characteristics and Components of Radio Signals
      • Understanding Plasmas
      • Importance of Electron Collisions
      • Appleton/Hartree Contributions
      • Signal Polarization and Coupling
      • Ionospheric Absorption
        • Deviative Absorption
        • Non-Deviative Absorption
      • Fading
      • Multipathing
      • Travelling Ionospheric Disturbances
      • Solar Related Disturbances
      • Structure of the Ionosphere
        • Ionospheric Layers
        • Importance of Sporadic-E
        • Effects of Spread-F
        • Solar-Cycle Dependencies
        • Models of the Ionosphere
          • Simple Mathematical Models
          • Numerical Maps
          • CCIR
          • URSI
          • The International Reference Ionosphere (IRI)
          • Others
        • Probing the Ionosphere
        • Probing Techniques
        • Probing Instruments
        • Sources of Ionosonde Information
    • Basic Ray-Tracing Concepts
      • Ordinary vs Extraordinary Signals
      • Becoming Familiar with Ray-Tracing Software
    • Ray-Tracing in Three-Dimensions
      • Ray-Tracing Software Considerations
      • Preparing for 3D Ray-Tracings
      • Performing 3D Ray-Tracings
      • Studying 3D Ray-Tracing Results
    • Vertical Radio Signal Propagation
      • Signal Reflection Behavior
      • Critical Frequencies
      • Ray-Tracing Vertically-Incident Signals
    • Oblique Radio Signal Propagation
      • Signal Refraction/Reflection Characteristics
      • Effects of Geomagnetic Activity
      • Effects of Solar Activity
      • Ray-Tracing Obliquely Incident Radio Signals
      • Determination of Maximum Usable Frequencies
        • Simple Empirical Methods
        • Ray-Tracing Techniques
      • Effects of Sporadic-E
      • Non-Great-Circle (NGC) Propagation
        • Responsible Conditions
        • Compensation Methods
        • Ray-Tracing Techniques to Analyze NGC Propagation
      • Chordal-Hop and Inter-Layer Ducting Propagation
        • Advantages and Disadvantages
        • Analysis using Ray-Tracing Techniques
      • Searching for and Exploiting Exotic Propagation Paths
        • Properties of Exotic Paths
        • Searching for Exotic Paths using 3D Ray-Tracing Techniques
        • Determining the Most Reliable Exotic Radio Paths
    • Ionospheric Disturbances
      • Solar Related Disturbances
        • Solar Flares and Related Coronal Mass Ejections
        • Coronal Holes and High Speed Solar Wind Streams
        • Filament Related Coronal Mass Ejections
        • Impact of Flare Related Radio Noise Bursts
      • Short Wave Fadeouts
      • Sudden Phase Anomalies
      • Sudden Frequency Deviations
      • Devastating Effects of Polar Cap Absorption
      • Disturbances and their Effects on Satellite Communications
  • Radio Propagation Prediction Methods
    • Short-Term Forecasting Techniques
    • Medium-Term Forecasting Techniques
    • Long-Term Forecasting Techniques
    • Sources of Forecasting Information
  • Applied Forecasting Techniques
    • Climatology
    • Pattern Recognition
    • Compiling Necessary Information
    • Exploiting Databases
    • Computer Related Aids
    • Studying Real-Life Examples
    • Developing Experience and "Intuition"
  • Field Experience
    • The STD SW Course presents you with some specific historic real-life scenarios. Using the information and techniques studied in this course, you are asked to develop your own space-weather and radio-propagation predictions. The actual real-life impacts are then studied and compared with your forecasts.
    • The Course presents you with several hypothetical (possible future) examples and ask you to develop your own forecasts.
  • Course Completed


Although this course is largely self-taught, STD will provide support if you run into difficulties. There are no prerequisites.

The course is available on-line for immediate purchase by following the instructions below.

Purchasing the Course

Please choose one of the following course packages.
  • Purchase: The course alone (no software), delivered over the Internet.

      Now: $200.00 - normally $250 USD
    • Pay Online by clicking the PayPal button:
      Note: This is only the course - no software. You are paying for the knowledge and content.

  • Purchase: The course with all software, delivered over the Internet.

    • SALE! BUY NOW AT $270.00 - compare to the normal price: $300 USD

    • Includes software: SWIM, STD Aurora Monitor, and PropLab-pro Version 3.0 (NEW!)
    • Pay Online by clicking the PayPal button:
      Note: You are paying for the knowledge and content of this course, PLUS GETTING THE SOFTWARE, TOO!

  • Purchase: The course with all software, delivered on CDROM.

    • SALE! SAVE HUGE, BUY NOW AT $315 - compare to the normal price: $350 USD

    • Includes software: SWIM, STD Aurora Monitor, and PropLab-pro Version 3.0 (New!)
    • Pay Online by clicking the PayPal button:
      Note: You are paying for the knowledge and content of this course, PLUS GETTING THE SOFTWARE, TOO - delivered by CDROM!