16 June 2020 - double hop full log

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daveB
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16 June 2020 - double hop full log

Post by daveB »

With some quiet time I've been able to re-visit the I/Q files from the OIRT band for the 16 June. I was pleasantly surprised to find a few more Russian stations from the Kuban region around 3000 km away. These were weak signals and included three at 500 watts power. Fortunately at around 0653 they gave out a telephone number - which was very distinctive and comparing the weak signals with the strong signal on 66.20 enabled them to be confirmed as being Radio Rossii as the signals were fading in and out.

The full list is below in descending order of distance with the two Azerbaijani stations at the top. I've also included a chart showing the propagation path highlighting where the intermediate ground reflection could be. And what stations were received from along the path. However there is always the possibility there was no intermediate ground point but that the mode was "chordal hop"

0645-0647 94.60 AZE 3687 km 90 deg Azərbaycan Radiosu Tapacannat 2 kw O=1-2
0645-0652 93.00 AZE 3673 km 89 deg Araz FM.......... Sheki=Şəki ??? O=2
0650-0707 72.98 RUS 3096 km 88 deg Radio Rossii...... Otradnaya 2 kw O=1-2
0650-0700 67.46 RUS 3065 km 89 deg Radio Rossii..... Psebay 3 kw O=1
0650-0655 72.20 RUS 2967 km 90 deg Radio Rossii..... Apsheronsk 500 w O=1-2
0658-0702 66.20 RUS 2939 km 87 deg Radio Rossii..... Tbilisskaya 17 kw O=2-3
0653-0654 72.71 RUS 2934 km 89 deg Radio Rossii..... Imeretinskaya 500 w O=1-2
0650-0651 69.59 RUS 2885 km 86 deg Radio Rossii..... Pavlovskaya 1 kw O=1
0650-0654 69.23 RUS 2852 km 88 deg Radio Rossii..... Timashevsk* 500 w O=1
0658-0705 68.36 RUS 2831 km 87 deg Radio Rossii..... Kanevskaya 17 kw O=3
0650-0700 67.97 RUS 2803 km 90 deg Radio Rossii..... Novorossiysk 17 kw O=1

* or Kropotkin a 400 w station 2972 km / 87 deg

AZE reception points at same time.png
David
Location: Sittingbourne, Kent JO01ji
SDRPlay, AirSpyMini, RTL dongles, ST311, Yamaha TX930. 5 ele yagi 20ft agl - 70 deg. FM5 - 80 deg, 5.1 Yagi 16ft agl - 120 degFM5 -180 deg. Vert 3-ele Moxon - 80 deg. Shielded magnetic loop 0.1-200 MHz - 10 ft agl

Franco Martelli
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Re: 16 June 2020 - double hop full log

Post by Franco Martelli »

Great log, David.

And, more, the image attached is very clear and interesting.
Rxs: Degen DE-1103, Sangean ATS-909, Tecsun PL-398 MP

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John Faulkner, Skegness
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Re: 16 June 2020 - double hop full log

Post by John Faulkner, Skegness »

Amazing stuff Dave!

daveB
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Re: 16 June 2020 - double hop full log

Post by daveB »

John Faulkner, Skegness wrote:
09 Jul 2020 10:04
Amazing stuff Dave!
Hi John,
There was more than one 'amazing thing' about it. 1. I started recording at 06:38 local time- 10 minutes later and I would have missed it. 2. I was trying to set the PC up to automatically change frequencies in time with change of recording files - and missed the change to 98.8 MHz centre frequency so had to wait another 4 minutes. If things had gone as intended I would have missed the AZE reception! 3. I have 3 SDR's one of which is dedicated to the OIRT band, but I can only record two at once - fortunately I checked the OIRT band, and as it was active, decided to record it from 06:50 rather than two Band II streams.

That is certainly a case of 'all the cherries in a row - jackpot!"
Location: Sittingbourne, Kent JO01ji
SDRPlay, AirSpyMini, RTL dongles, ST311, Yamaha TX930. 5 ele yagi 20ft agl - 70 deg. FM5 - 80 deg, 5.1 Yagi 16ft agl - 120 degFM5 -180 deg. Vert 3-ele Moxon - 80 deg. Shielded magnetic loop 0.1-200 MHz - 10 ft agl

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jotagarzon
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Re: 16 June 2020 - double hop full log

Post by jotagarzon »

Congrats Dave,
I have just heard OIRT whispers this season. Fortunately I have recordings with English African accent and Portuguese from the strong e-Skip openings to Africa, so must be some good stuff there, but I have too much to check before that. Hope to get some minor jackpot... or the big one! ;-)
Thanks for the image which is very, very interesting indeed!
Saludos
Jorge Garzón. EB7EFA / EA1036 SWL
IN83ag Cantabria (Spain) / 43°15'N • 3°56'W
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Rx: RSP1A/AirSpy HF+/Lowe HF 150/Sony SA3-ES-EE
Ant.: Fanfare FM-2G/Wellbrook 1530LN/5el SKT Yagi
Blog: http://iberiadx.wordpress.com

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John Faulkner, Skegness
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Re: 16 June 2020 - double hop full log

Post by John Faulkner, Skegness »

That really *is* amazing David. This wonderful hobby really is all about being in the right place at the right time.

I had a similar experience with one of my early morning recordings last month Dave. It wasn't Azerbaijan I received, but merely CZE and SVK - countries I have not had much Es success with over the years due to the shorter distance. I set up the S2 to record four hours of the top of the band, beaming east, vertically one morning, purely to catch meteor scatter, not expecting to get over an hour's worth of excellent reception of low power CZE/SVK stations. There was nothing notable in the way of MS that morning as it happened.

As you may remember, I attempted to set up this very same recording method myself a few years ago but I didn't get very far with it. I wanted to create an XML file with every minute of the day logged into it so I could simply drop in the file and let the receiver record across the band for me in four rotating blocks. Maybe next year. ;) In fact, I should still get this prepared for the forthcoming tropo season, should we actually have one this year, should I be away from home.

Once again this season, my attitude to the hobby has been very relaxed. I have made very few recordings so there isn't a lot of catching up to do. I doubt very much that there will be anything exotic in there.

One thing this has all made me realise is that I would like to focus more on the OIRT range for the remaining days of this season. I hope to have my XDR-F1HD set up by the end of the week and I hope there is still chance to catch something out Azerbaijan way. ;) I haven't had a single instance of double hop this year, apart from UNID Arabic/Turkish sounding signals on 87.5/6 during two mornings of intense Es activity to Austria and Hungary. My CNR and AZR reception were probably tropo assisted Es.

All in all, I am not too disappointed with this season, but a spot of double-hop OIRT would finish things off nicely.

daveB
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Re: 16 June 2020 - double hop full log

Post by daveB »

One thing this has all made me realise is that I would like to focus more on the OIRT range for the remaining days of this season.
This season it feels as if I have had far more openings on the OIRT band than previously. In 2019 I had 9 openings from 25/04/2019 to 22/06/2019 and then a gap until 22/07/2019. This year I've had 8 openings from 23/06/2020 to 13/07/2020, on top of those earlier in the season. There was another strong opening today and I've yet to check any of the recordings to see thats there.

One thing is clear, the 1.2 m shielded magnetic loop gives a much better performance than the 70 MHz dipole I previously used. I read the theory about electric and magnetic fields, but it still doesn't gel - how can a loop of (insulated) wire enclosed in a grounded circular metal tube with a 1 " gap at the top pick up the signals. But it works - with double hop signals from 3000 km received. The 17 kW stations from the Kuban region coming in quite strongly. The loop is now just 3 m above the ground.

And as reported elsewhere it gives good results on MW DX.
Location: Sittingbourne, Kent JO01ji
SDRPlay, AirSpyMini, RTL dongles, ST311, Yamaha TX930. 5 ele yagi 20ft agl - 70 deg. FM5 - 80 deg, 5.1 Yagi 16ft agl - 120 degFM5 -180 deg. Vert 3-ele Moxon - 80 deg. Shielded magnetic loop 0.1-200 MHz - 10 ft agl

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John Faulkner, Skegness
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Re: 16 June 2020 - double hop full log

Post by John Faulkner, Skegness »

It's beyond me David, but I remember how excellent my old ALA1530 was on MW. Perhaps it's the same science behind that simple old FM Loop. That performed a lot better than a single element dipole.

Having said about becoming active on OIRT again, I think it's highly unlikely that this will happen now. I have too much to do really and I am not sure I can be bothered to sort out another simple tower and feed all the coax through, etc. Yes, partly laziness, but I also need to set up for the coming MW season too - which is already bringing in a few good results for other DXers, so it's a bit of a surplus to requirements thing really.

daveB
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Re: 16 June 2020 - double hop full log

Post by daveB »

John Faulkner, Skegness wrote:
14 Jul 2020 16:42

Having said about becoming active on OIRT again, I think it's highly unlikely that this will happen now. I have too much to do really and I am not sure I can be bothered to sort out another simple tower and feed all the coax through, etc.
There is a limit to how much time one can/should devote to a hobby. I'd like to do it all - to be able to record the whole FM spectrum in one go, and the OIRT at the same time, but the time it would take to go through everything... It becomes a chore - and that is 'work', not 'hobby'.

There was an intense OIRT opening on the 13th in the middle of the day, followed by a strong all band opening to Scandanavia in the evening. It's taken all day, off and on, just to go through 4 files of 4 minutes each to log all the reception. So I've learned (or am learning) to be selective and concentrate on the unusual and take snapshots, so to speak, from the recordings.
Location: Sittingbourne, Kent JO01ji
SDRPlay, AirSpyMini, RTL dongles, ST311, Yamaha TX930. 5 ele yagi 20ft agl - 70 deg. FM5 - 80 deg, 5.1 Yagi 16ft agl - 120 degFM5 -180 deg. Vert 3-ele Moxon - 80 deg. Shielded magnetic loop 0.1-200 MHz - 10 ft agl

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John Faulkner, Skegness
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Re: 16 June 2020 - double hop full log

Post by John Faulkner, Skegness »

daveB wrote:
14 Jul 2020 23:14
There is a limit to how much time one can/should devote to a hobby. I'd like to do it all - to be able to record the whole FM spectrum in one go, and the OIRT at the same time, but the time it would take to go through everything... It becomes a chore - and that is 'work', not 'hobby'.
Don't I know it. My attitude to the hobby has been so relaxed over the last few years. I almost gave up on everything after my troubles back in early 2017. After giving myself a kick up the proverbial shortly afterwards I lost much of any free time. (More to the point, badly managed my free time.)
daveB wrote:
14 Jul 2020 23:14
There was an intense OIRT opening on the 13th in the middle of the day, followed by a strong all band opening to Scandanavia in the evening. It's taken all day, off and on, just to go through 4 files of 4 minutes each to log all the reception. So I've learned (or am learning) to be selective and concentrate on the unusual and take snapshots, so to speak, from the recordings.
I caught the Scandinavian opening, and also a superb band-wide opening to Greece and Macedonia yesterday afternoon. Everything was recorded - and that's the way it's going to be. I'll have to check my recordings 'as and when'. It's just the way it's got to be for me. My other DX love, medium wave is far simpler to keep on top of, but I can get behind a few days with that too.

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