Whilst counting the number of 'steps' of signals heard from the UK 5MHz beacons I noticed something unusual happening. Normally the signals drop down into the noise after about 17:45UTC and don't nor
With the Sun temporarily virtually spotless again we will see daily solar flux values fall below 90. The end result will be lower MUF's and little in the way of F2 layer propagation on 10 & 12 meters
Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 342 Issued at 2200Z on 07 Dec 2004 IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: Solar activity was
David et all, The HF critical frequency could have stayed higher than 5 mhz and/or you may have been experiencing some sporadic E (Es) propagation. 73, Thomas F. Giella, KN4LF Retired Space & Atmosph
Thanks for the suggestions Thomas, Es seems a bit of a long shot, the signals were fairly consistent, and the only reason I didn't log them past 23:00 was that I went to bed. HI! What would cause the
David, There are many forms of sporadic E (Es). Looking at global ionograms I see Es every day of the week, even though it's allegedly most prevalent in summer. Es propagation can be very stable too.
Using PropView, I have generated a set of short-path and long-path propagation forecasts between each of the 10 continental US call areas and the Andaman Islands; these forecasts are accessible via h
SIDC URSIGRAM 41209 SIDC SOLAR BULLETIN 09 Dec 2004, 1238UT SIDC FORECAST (valid from 1230UT, 09 Dec 2004 until 11 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-class flares) GEOM
Yesterday December 08, 2004 at approximately 1959 UTC a long duration C2.5 solar flare at N04W11 occurred in associationwith sunspot group #10709. A filament eruption near N01W07 also occurred during
SIDC URSIGRAM 41210 SIDC SOLAR BULLETIN 10 Dec 2004, 1212UT SIDC FORECAST (valid from 1230UT, 10 Dec 2004 until 12 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-class flares) GEOM
Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 344 Issued at 2200Z on 09 Dec 2004 IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity was
SB PROP @ ARL $ARLP051 ARLP051 Propagation de K7RA ZCZC AP51 QST de W1AW Propagation Forecast Bulletin 51 ARLP051 Seattle, WA December 10, 2004 To all radio amateurs SB PROP ARL ARLP051 ARLP051 Propa
(RWC-Belgium) # SIDC URSIGRAM 41211 SIDC SOLAR BULLETIN 11 Dec 2004, 1212UT SIDC FORECAST (valid from 1230UT, 11 Dec 2004 until 13 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-cl
(RWC-Belgium) # SIDC URSIGRAM 41212 SIDC SOLAR BULLETIN 12 Dec 2004, 1220UT SIDC FORECAST (valid from 1230UT, 12 Dec 2004 until 14 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-cl
(RWC-Belgium) # SIDC URSIGRAM 41213 SIDC SOLAR BULLETIN 13 Dec 2004, 1241UT SIDC FORECAST (valid from 1230UT, 13 Dec 2004 until 15 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-cl
Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 347 Issued at 2200Z on 12 Dec 2004 IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: Solar activity was
(RWC-Belgium) # SIDC URSIGRAM 41214 SIDC SOLAR BULLETIN 14 Dec 2004, 1235UT SIDC FORECAST (valid from 1230UT, 14 Dec 2004 until 16 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-cl
(RWC-Belgium) # SIDC URSIGRAM 41215 SIDC SOLAR BULLETIN 15 Dec 2004, 1257UT SIDC FORECAST (valid from 1230UT, 15 Dec 2004 until 17 Dec 2004) SOLAR FLARES : Quiet conditions (<50% probability of C-cl
Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 349 Issued at 2200Z on 14 Dec 2004 IA. Analysis of Solar Active Regions and Activity from 13/2100Z to 14/2100Z: Solar activity was