17 Jul 2014

10m - tropo?

In the last few hours, I have spotted PB0AIC several times with low(ish) Doppler at 288km.  This is far too short for Es (unless the skip is extremely short, suggesting a 2m Es opening?) so I wonder if this is pure tropo? The distance exceeds most GDX  (usually possible with aircraft reflections) out to around 200km.  I have spotted PA stations before on 10m now.
Recent WSPR spots today
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2 comments:

  1. AnonymousThu Jul 17, 09:31:00 pm GMT+1

    Hello Roger
    I remember reading in the VHF DX handbook that the distance of a single hop sporadic E is greater the higher in frequency you go so the skip on 28Mhz should be shorter than on 144Mhz

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  2. Roger G3XBMThu Jul 17, 10:08:00 pm GMT+1

    Yes, that is so. VERY short Es skip on,say, 28MHz is a good indicator of Es on much higher frequencies with a longer skip range. But the "skip" here is, I think, far too short for 28MHz Es. I may be wrong, but suspect tropo or aircraft.

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