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Propagation
Links to radio propagation web sites
(Featuring 14 links)
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- Near-Real-Time F2-Layer Critical Frequency Map
- This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space.
The map shows the radio auroral zones as green bands near the northern and southern poles.
- D-Region Absorption Prediction
- This map represent the current position of the sun and how a solar flare influence an HF fade. Estimated recovery time is also represented. Includes son java and javascript animations of last two hour conditions
Alphabetical
- D-Region Absorption Prediction
- This map represent the current position of the sun and how a solar flare influence an HF fade. Estimated recovery time is also represented. Includes son java and javascript animations of last two hour conditions
[Hits: 1219 | Votes: 3 | Rating: 4.33] - Geomagnetic and Solar Indices
- NOAA / Space Weather Prediction Center, Geomagnetic K-indices and Running A-indices, Local Noon Solar Radio Flux, Daily Solar Indices with SSN
[Hits: 88 | Votes: 0 | Rating: 0.00] - Geophysical Alert Message wwv.txt
- 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
[Hits: 818 | Votes: 8 | Rating: 8.87] - Hourly STD Solar and Geophysical Report
- Boulder K-Indices, Planetary K-Indices, 10.7 cm solar radio flux updated every 30 minutes by Canada's Space Weather center
[Hits: 849 | Votes: 1 | Rating: 10.00] - Near-Real-Time F2-Layer Critical Frequency Map
- This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space.
The map shows the radio auroral zones as green bands near the northern and southern poles.
[Hits: 1674 | Votes: 10 | Rating: 5.61] - NOAA Space Weather Scales
- The NOAA Space Weather Scales were introduced as a way to communicate to the general public the current and future space weather conditions and their possible effects on people and systems.
The scales describe the environmental disturbances for three event types: geomagnetic storms, solar radiation storms, and radio blackouts.
[Hits: 569 | Votes: 1 | Rating: 10.00] - Propagation Planning for DXpeditions
- 6 Steps for a More Successful Trip by Carl Luetzelschwab K9LA
[Hits: 48 | Votes: 1 | Rating: 10.00] - Radio Wave Propagation
- A PDF document, used for ham radio training, that cover all aspects of radio wave propagation
[Hits: 546 | Votes: 5 | Rating: 4.80] - Report of Solar and Geophysical Activity
- The Report and Forecast of Solar and Geophysical Activity is the primary daily report prepared by SEC. It provides a summary and analysis of solar and geomagnetic activity during the previous 24 hours as well as the most recent solar indices. It also provides a forecast of activity and indices for the next 3 days.
[Hits: 609 | Votes: 1 | Rating: 10.00] - SEC's Radio User's Page
- Provide radio operators with current data on the state of the ionosphere. Real-time Displays, Recent Space Environment Reports, Ionospheric Data Sets, Summaries & Medium Range Forecasts
[Hits: 655 | Votes: 1 | Rating: 10.00] - The Ground Wave
- About ground wave, article by moonraker.com.aut
[Hits: 380 | Votes: 0 | Rating: 0.00] - Today's Space Weather - SEC
- Another interesting reports page with plots and graphs of solar flux.
Interesting resources provided here includes, Solar images, a text 3 day solar geophysical forecast, a 3-days Solar X-Ray flux plot updated evety 5 minutes, The Satellite Environment Plot, combines satellite and ground-based data
[Hits: 797 | Votes: 1 | Rating: 10.00] - VHF Propagation Maps
updated
- Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.
[Hits: 74 | Votes: 1 | Rating: 9.00] - VHF/UHF Propagation
- In the past few years there has been a growing movement from VHF frequencies (50-300 MHz) to UHF (300-900 MHz). Many, however, have found the move fraught with difficulties.
[Hits: 683 | Votes: 3 | Rating: 6.33]
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