• [EI7GL] 12,000km opening between Australia & California - 27th Dec 2021

    From EI7GL via rec.radio.amateur.moderat@21:1/5 to All on Fri Dec 31 05:34:01 2021
    XPost: rec.radio.amateur.misc

    EI7GL....A diary of amateur radio activity

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    12,000km opening between Australia & California - 27th Dec 2021

    Posted: 31 Dec 2021 02:00 AM PST https://ei7gl.blogspot.com/2021/12/12000km-opening-between-australia.html



    Monday 27th December 2021: It was interesting to see that there was a
    recent opening on the 50 MHz band between the SE of Australia and southern California. Unlike openings from Australia to South America, this one
    crossed the equator and went to North America.
    There is a very active group in Australia & New Zealand using the WSPR
    beacon mode and on the 27th of December, VK2IJM and VK2EFM in New South
    Wales heard N3IZN in California. UTC (y-m-d) TX txGrid RX
    rxGrid MHz W SNR drift km 2021-12-27 01:16 N3IZN DM13ji VK2IJM QF56ni 50.294549 100 -24 0 12115
    2021-12-27 00:52 N3IZN DM13ji VK2EFM QF56oq 50.294554 100 -18 0 12091
    The distance was just over 12,000kms.
    Propagation Mode?? The first most obvious answer is that it was multi-hop Sporadic-E but I suspect the reality is more complex that that. The signal
    path crosses the TEP zone around the equator so that may have had some
    impact. The solar flux is up around 120 and the MUF is now above 30 MHz
    most days. Is it reaching 50 MHz near the equatorial region?
    Western Australia to Europe?? The example above was just over 12,000kms,
    that is the same distance from the west coast of Australia to the
    south-east of Europe. Are there openings between Europe and Australia on 50
    MHz at the moment?

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    2900km+ opening on 144 MHz across the south of Australia - Dec 2021

    Posted: 30 Dec 2021 05:29 AM PST https://ei7gl.blogspot.com/2021/12/2900km-opening-on-144-mhz-across-south.html



    The southern hemisphere is currently in the middle of their summer and
    there is plenty of activity on the 144 MHZ band with lots of stations
    testing out propagation paths with the WSPR beacon mode.
    In the last few days, signals in the region of 2930kms have been heard
    across the south of Australia on 144 MHz.
    The map above shows the stations that VK6JR has heard.
    Stations heard by VK6JR (2000kms+) UTC (y-m-d) TX txGrid RX
    rxGrid MHz W SNR drift km 2021-12-25 19:28 VK2KRR QF34mr VK6JR OF76mi 144.490461 20 -17 0 2927
    2021-12-29 20:34 VK7DC QE28ww VK6JR OF76mi 144.490484 10 -25 -1 2831
    2021-12-29 14:38 VK3OE QF22qc VK6JR OF76mi 144.490395 20 -14 0 2765
    2021-12-29 14:48 VK3DXE QF21nv VK6JR OF76mi 144.490395 20 -29 0 2743
    2021-12-27 17:22 VK3ZAZ QF12ag VK6JR OF76mi 144.490448 100 -24 0 2471
    2021-12-29 20:26 VK3HJV QF01tp VK6JR OF76mi 144.490408 20 -18 -4 2439
    2021-12-04 22:22 VK5AKK PF94ix VK6JR OF76mi 144.490504 50 -22 0 2173

    Stations hearing VK6JR (2000kms+)UTC (y-m-d) TX txGrid RX
    rxGrid MHz W SNR drift km 2021-12-25 19:26 VK6JR OF76mi VK2KRR QF34mr 144.490577 10 -19 1 2927
    2021-12-29 21:08 VK6JR OF76mi VK7CMV QE29od 144.490482 10 -26 0 2772
    2021-12-29 20:44 VK6JR OF76mi VK3DXE QF21nv 144.490422 10 -22 0 2743
    2021-12-27 18:22 VK6JR OF76mi VK3ZAZ QF12ag 144.490491 10 -29 0 2471
    2021-12-29 18:22 VK6JR OF76mi VK3HJV QF01tp 144.490595 10 -27 1 2439
    2021-12-23 22:38 VK6JR OF76mi VK5AKK PF94ix 144.490486 10 -28 3 2173
    Propagation Mode: It's likely that marine ducting across the Great
    Australian Bight played a large part in these openings which were just
    under 3000kms. Considering it's in the middle of the southern hemisphere Sporadic-E season, that mode could have played a partial role as well for
    some signals.
    Links...1) For more examples of long distance paths, see my 144 MHz page.

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