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This page is a compilation of information I have got about TEP on 144 MHz. These openings seem to be relatively common between The Caribbean and south America and between Japan and Australia, but very rare between Europe and southern Africa. According to the reported QSO we can get to some statistical conclusions.
It's important to notice that there are two types of TEP, the so called afternoon-TEP which only supports communications up to 70 MHz and the evening-TEP that is the type supporting the contacts on 144 MHz (and even 432 MHz). The afternoon-TEP seems to be a result of the equatorial anomaly while the evening-TEP is field-guided mode which relies on the existence of ionospheric bubbles, tubes or plumes that have an electron concentration lower than the surrounding area. Rays are reflected from the surfaces of the bubble walls, at all times staying within the ionosphere until they finally emerge on a path down to the ground.
If you have ANY additional information about TEP on 144 MHz or QSO achieved please send it to my E-Mail so that I can complete these pages. Your comments will also be welcome.
Costas Fimerelis (SV1DH) G3WOS BBQ Aug. 2007 presentation - 50Mhz ionosphere propagation modes observed from Athens over the last three solar cycles.(13 MB !)
Fimerelis C.G. Phd thesis, 1986 (Greek) (13 MB !)
> 0246 pp5jd 144200.2 FG4KH FELIPE CQ CQ 59
> 0244 py2rek 144200.0 FG4KH correct call
> 0240 pp5jd 144200.2 FG4KH
> 0239 py2dv 144200.0 FG4KH 59 in GG57sc -BOTUCATU
> 0239 pu2knm 144200.0 FG4KH s5/9 in gg55nl cq dx
> 0229 py2rek 144200.0 FG4KW tnx vry nice qso in gg65pu
> 0225 fg4kh 144200.0 PY2RTY TEP 55
> 0204 pu2txz 144200.0 FG4KH TNX Contact 57 58 73 Philep
> 0203 fg4kh 144200.0 PU2TXZ TEP 54
> 0202 fg4kh 144200.0 PY2GN TEP 55
Bibliography section has been moved to a new page
For stations in Southern Africa area, remember that the call frequency in Europe is 144.300 MHz, and that there is where everyone is listening most of the time. Please use 144.300 when calling for TEP to Europe !. And remember that best times in our longitude are between 17:00 and 19:00 UTC
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