50Mhz ionosphere propagation modes observed from Athens over the last three solar cycles. Costas Fimerelis , SV1DH G3WOS BBQ Aug. 2007.
Costas Fimerelis , SV1DH
G3WOS BBQ Aug. 2007
Abstract: An overview of the numerous 6m ionosphere propagation modes observed from Athens during the last three solar cycles (1978-2007) is presented in detail, related to the location geographical and radio noise limitations. Exotic modes like LP to Pacific and LDE to Australia, as well A and E-TEP to Africa are also discussed.
Path Km Mhz Min Sa Max Kp Observ.
-main window: 2100-2430z (peak 23z) to JA1,2,3(80%)
-sec. window: 1130-1300z (peak 12z) to JR6 (13%)
-sole window: 0800-0900z (incl scatter) to JA1 (7%)
-weak sigs, need for low noise location
-first obs. on 9/10/88 (well before any SP opening)
-main window: 0830-1030z (no AF sigs) (52%)
-sec window: 1900-1930z (10%)
-rare window: 1500-1900z (incl scatter over SA) (38%)
-strong and clean sigs
-sole window: 2000-2230z
-marginal to strong sigs with some flutter
Path attenuation almost at free space value
Path attenuation some db above free space value
SCATTER TO SEASON TIME(z) QTF COMMENTS
S. EU Mar &Oct 12-13 Arabic Pen. Northern TEP crest
S. EU “ 14-16 NW. AF & Moderate sigs
N. EU end Oct 09-10 Central AS Weak sigs
N. EU “ 13-14 Caribbean “
JA Mar-Apr ~10 Arabic Pen. Very weak sigs
NA&Carib. late Oct 13-20 NW. AF Weak sigs
SA late Mar 19-23 SW. AF Weak&distorted
to mid July, between 10-22z with medium strong signals
W5, June 2007, but max worldwide recorded ~13500Km)
-All skewed openings outside EU, F2+F2Sc
-Openings to VK8 mid June, Es+F2
-Openings to VK9X late April, Es+TEP?
-Openings to VQ9 late April, Es+TEP
-Opening to VU mid Oct, Es+F2