On the morning of the 14th of December 2021, I noticed a lot of meteor scatter bursts of weak signals from G0MBA and G0PKT on 28 MHz. Both stations are located about 650kms to the east of me and the bursts were due to the Geminid meteor shower.
They are both sending QRSS signals which is very slow morse code which can be decoded visually and they transmit about 400Hz below the WSPR signals on 28 MHz.
An example of what the signals should look like is shown below. This is from a Sporadic-E opening last May.
I did note this morning that while I was hearing all of these meteor scatter bursts, I was getting no WSPR decodes from either station. This was no great surprise as WSPR signals are nearly two minutes in length and only exceptional meteor bursts are that long even on a low frequency like 28 MHz.
As you can tell from the initial image, signals from meteor scatter look a bit of a mess and I'm sure this doesn't help with decoding either.
I did manage some WSPR decodes from both G0 stations later but I suspect it might have been weak Sporadic-E.
2021-12-14 08:38 G0MBA JO01 EI7GL IO51tu 28.126066 0.2 -19 -1 645
2021-12-14 09:18 G0MBA JO01 EI7GL IO51tu 28.126067 0.2 -20 -1 645
2021-12-14 09:38 G0MBA JO01 EI7GL IO51tu 28.126065 0.2 -24 0 645
2021-12-14 08:08 G0PKT JO01mt EI7GL IO51tu 28.126078 0.2 -22 0 647
2021-12-14 08:38 G0PKT JO01mt EI7GL IO51tu 28.126077 0.2 -15 -1 647
2021-12-14 09:18 G0PKT JO01mt EI7GL IO51tu 28.126078 0.2 -18 0 647
2021-12-14 09:38 G0PKT JO01mt EI7GL IO51tu 28.126075 0.2 -18 0 647
2021-12-14 12:18 G0PKT JO01mt EI7GL IO51tu 28.126076 0.2 -21 -1 647
2 comments:
Hi John, I ended up here after Googling 10M MS frequencies, I'm surprised to see so little information about it on amateur sites and almost no activity. I've heard lots of MS on 28MHz over the years so I'm amazed no one has promoted MSK144 on the band and settled on a frequency for it.
Paul
G7PUV
G9PUV
Hello,
I've been trying to promote 28MHz MS for years. I have some references/links on the history and examples of 28MHz on my QRZ page. The 1950's QST article has some very informative graphics. I have persuaded a few stations to try via the KST forum. On occasion after the qso's I've sent audio files to the other station to prove it was MS. (Also some ask as they are just curious to hear their signals....)
After seeing a video on YouTube I've been using 28.145MHz for MSK144/JTMS as this is in the data mode part of the band but there indeed doesn't seem to be an "official" MS frequency.
If you want to try on either of the two "extreme" MS bands (28MHz or 432MHz) look out for me during the showers on KST or via email. I'd be delighted to try!
Cheers,
Bill, GM0ICF. gm0icf at yahoo dot come (you probably know the drill... hi ; - ))
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