https://mt-shortwave.blogspot.com/2016/06/weekly-propagation-forecast-bulletins_13.html
Shortwave Central: Weekly Propagation Forecast Bulletins
Product: Weekly Highlights and Forecasts :Issued: 2016 Jun 13 0444 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Pred...
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https://ng3k.com/Arlp/arlp032.html
ARRL Propagation Forecast Bulletin 32: July 28, 1995
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https://www.dxzone.com/dx35357/noaa-predicted-sunspot-number.html
NOAA Predicted Sunspot Number - Propagation/Propagation Forecast | The DXZone
Predicted Solar Cycle: Sunspot Number And Radio Flux Values with Expected Ranges, sources are Penticton, B.C., Canada, S.I.D.C. Brussels
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