And again Perseids, one of the most abundant meteor showers. The middle of August is a suitable time for meteor observations not only in optical part of the electromagnetic spectrum, but also on radio waves, which can be reflected by plasma of meteor trails and received on distances of a single E-hop, far away from transmitters.
General impressions: the signals were weaker than past year, thats why no stations identified by RDS information this time. Luckily, Czech, German, Austrian, Swedish and Hungarian national broadcasters have excellent audio archives which are a huge support in identification of the stations. Various playlists were also used for this purpose. Anyway, I'm satisfied with the results.
A recent theory of meteor trail plasma diffusion made the novel prediction that meteor trails diffuse much faster during daylight hours than at night. This occurs because the plasma density of the background ionosphere increases by up to a factor of 100 with sunrise. [Meteor Trails in the Ionosphere: Latest Results from Observations and Theory, M. M. Oppenheim, G. Suger, E. N. Bass, Y. S. Dimant, Sigrid Close and Lars P. Dyrud]. Be that as it may, my loggings are too scanty to be an argument for some serious conclusions. However, I didn't find any dependency between time of the day and average duration of bursts for now.
By the way, here one can see signal of Svitle Radio Emmanuil pirate relay on 88.0 MHz, but that's a topic for one of the next posts.
Stations from 11 countries were received by means of meteor scatter with hop distances up to ~2110 km and identified. The following table includes all identified broadcasters during MS observations 12.08.2020 - 16.08.2020 grouped by dates:
12.08.2020
20:46 | 91.20 | MHz | S | SR P2 | Halmstad/Oskarström (tent.) | 60 | kW | 1350 | km | 309 | ° |
20:46 | 92.00 | MHz | POL | PR 2 (tent.) | Suwałki/G. Krzemianucha | 30 | kW | 670 | km | 312 | ° |
20:46 | 92.10 | MHz | S | SR P2 | Nässjö (tent.) | 60 | kW | 1300 | km | 314 | ° |
20:51 | 90.20 | MHz | HNG | MR 1 Kossuth Rádió | Nagykanizsa/Újudvar | 50 | kW | 1070 | km | 252 | ° |
21:31 | 88.80 | MHz | CZE | ČRo Sever | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
13.08.2020
16:04 | 88.50 | MHz | CZE | ČRo Radiožurnál | Trutnov/Černá hora | 16 | kW | 1040 | km | 277 | ° |
16:04 | 89.30 | MHz | D | hr3 | Großer Feldberg (Taunus) | 100 | kW | 1560 | km | 278 | ° |
16:14 | 88.70 | MHz | D | Bayern 2 | Grünten (Allgäu) | 100 | kW | 1500 | km | 266 | ° |
16:14 | 89.50 | MHz | D | Bayern 2 | Wendelstein | 100 | kW | 1370 | km | 265 | ° |
19:27 | 89.10 | MHz | G | BBC Radio 2 | Wrotham (tent.) | 250 | kW | 2110 | km | 285 | ° |
19:27 | 91.30 | MHz | G | BBC Radio 3 (tent.) | Wrotham (tent.) | 250 | kW | 2110 | km | 285 | ° |
19:47 | 88.80 | MHz | CZE | ČRo Sever | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
19:52 | 91.50 | MHz | D | MDR JUMP | Brocken | 100 | kW | 1390 | km | 284 | ° |
20:00 | 87.60 | MHz | HNG | MR 1 Kossuth Rádió | Győr/Szabadhegy | 7.6 | kW | 980 | km | 257 | ° |
20:17 | 88.80 | MHz | CZE | ČRo Sever | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
20:17 | 90.50 | MHz | CZE | ČRo Hradec Králové | Trutnov/Černá hora | 20 | kW | 1040 | km | 277 | ° |
20:33 | 92.00 | MHz | D | SWR 2 | Donnersberg | 60 | kW | 1610 | km | 276 | ° |
14.08.2020
10:03 | 90.40 | MHz | AUT | Hitradio Ö3 | Klagenfurt 1 | 100 | kW | 1300 | km | 258 | ° |
10:03 | 91.20 | MHz | AUT | Ö1 | Graz 1/Schöckl | 80 | kW | 1150 | km | 258 | ° |
10:28 | 88.20 | MHz | D | NDR Kultur (tent.) | Rostock-Toitenwinkel | 160 | kW | 1310 | km | 296 | ° |
10:28 | 90.50 | MHz | D | NDR 1 Radio MV | Helpterberg | 100 | kW | 1200 | km | 293 | ° |
10:28 | 91.00 | MHz | D | NDR 1 Radio MV | Rostock-Toitenwinkel | 100 | kW | 1310 | km | 296 | ° |
10:28 | 91.90 | MHz | D | NDR 2 | Bungsberg | 50 | kW | 1400 | km | 295 | ° |
10:28 | 92.00 | MHz | POL | PR Radio Szczecin (tent.) | Szczecin/Kołowo | 60 | kW | 1130 | km | 293 | ° |
16:34 | 89.40 | MHz | S | SR P1 | ? | ? | kW | ???? | km | ??? | ° |
16:40 | 89.40 | MHz | S | SR P1 | ? | ? | kW | ???? | km | ??? | ° |
18:12 | 89.40 | MHz | S | SR P1 | ? | ? | kW | ???? | km | ??? | ° |
18:13 | 89.70 | MHz | HRV | HRT-HR 1 | Biokovo/Sveti Jure | 80 | kW | 1280 | km | 238 | ° |
18:45 | 90.00 | MHz | GRC | ERA 2 Deutero Programma (tent.) | Thessaloniki/Hortiatis | 100 | kW | 1230 | km | 211 | ° |
18:45 | 92.00 | MHz | GRC | ERA 3 Trito Programma | Thessaloniki/Hortiatis | 100 | kW | 1230 | km | 211 | ° |
19:15 | 90.10 | MHz | D | SWR 4 Baden-Württemberg | Stuttgart-Degerloch | 100 | kW | 1540 | km | 272 | ° |
19:16 | 91.10 | MHz | CZE | ČRo Radiožurnál | České Budějovice/Kleť | 78 | kW | 1170 | km | 268 | ° |
19:30 | 88.80 | MHz | CZE | ČRo Sever | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
19:30 | 90.20 | MHz | D | MDR JUMP (tent.) | Inselsberg | 100 | kW | 1410 | km | 280 | ° |
19:30 | 90.50 | MHz | CZE | ČRo Hradec Králové | Trutnov/Černá hora | 20 | kW | 1040 | km | 277 | ° |
19:30 | 90.90 | MHz | CZE | ČRo Radiožurnál | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
19:30 | 92.20 | MHz | D | MDR Sachsen | Dresden-Wachwitz | 100 | kW | 1170 | km | 280 | ° |
15.08.2020
10:40 | 91.30 | MHz | D | SR 2 Kultur (tent.) | Göttelborner Höhe | 100 | kW | 1680 | km | 275 | ° |
10:40 | 91.40 | MHz | CZE | Radio Impuls (tent.) | Plzeň/Krašov | 100 | kW | 1230 | km | 275 | ° |
22:52 | 89.00 | MHz | FIN | YLE Radio Yksi | Haapavesi | 30 | kW | 1560 | km | 351 | ° |
22:52 | 88.60 | MHz | FIN | YLE Radio Yksi | Pihtipudas (tent.) | 50 | kW | 1460 | km | 350 | ° |
22:52 | 89.90 | MHz | FIN | YLE Radio Yksi | Jyväskylä | 30 | kW | 1350 | km | 349 | ° |
22:52 | 90.40 | MHz | FIN | YLE Radio Yksi | Oulu - Uleåborg | 50 | kW | 1650 | km | 352 | ° |
22:52 | 91.10 | MHz | FIN | YleX | Pihtipudas | 50 | kW | 1460 | km | 350 | ° |
22:52 | 91.30 | MHz | S | SR P1 | Kalix | 60 | kW | 1780 | km | 350 | ° |
22:52 | 91.40 | MHz | FIN | YLE Radio Yksi (tent.) | Kruunupyy - Kronoby | 60 | kW | 1540 | km | 347 | ° |
22:52 | 91.60 | MHz | FIN | YLE Radio Yksi | Kuopio | 50 | kW | 1390 | km | 354 | ° |
22:52 | 92.10 | MHz | FIN | YleX | Mikkeli - Sankt Michel | 30 | kW | 1260 | km | 353 | ° |
16.08.2020
10:38 | 90.60 | MHz | D | WDR 5 | Teutoburger Wald/Bielstein | 100 | kW | 1510 | km | 285 | ° |
10:38 | 92.10 | MHz | D | NDR 2 | Torfhaus (Harz-West) | 100 | kW | 1400 | km | 284 | ° |
10:38 | 87.70 | MHz | D | MDR Kultur (tent.) | Chemnitz/Geyer | 100 | kW | 1240 | km | 278 | ° |
10:38 | 88.80 | MHz | CZE | ČRo Sever | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
10:38 | 89.50 | MHz | D | hr3 (tent.) | Hoher Meißner | 100 | kW | 1450 | km | 282 | ° |
10:38 | 90.20 | MHz | D | MDR JUMP | Inselsberg | 100 | kW | 1410 | km | 280 | ° |
10:38 | 90.50 | MHz | CZE | ČRo Hradec Králové | Trutnov/Černá hora | 20 | kW | 1040 | km | 277 | ° |
10:38 | 90.80 | MHz | D | Deutschlandfunk Kultur | Cottbus/Calau | 20 | kW | 1160 | km | 284 | ° |
10:38 | 90.90 | MHz | CZE | ČRo Radiožurnál | Ústí nad Labem/Buková hora | 100 | kW | 1140 | km | 278 | ° |
10:38 | 91.10 | MHz | D | NDR 1 Niedersachsen | Steinkimmen | 100 | kW | 1540 | km | 290 | ° |
10:38 | 91.50 | MHz | D | MDR JUMP | Brocken | 100 | kW | 1390 | km | 284 | ° |
10:38 | 91.60 | MHz | D | SWR3 | Koblenz/Waldesch | 40 | kW | 1620 | km | 278 | ° |
10:38 | 91.70 | MHz | POL | PR 3 (tent.) | Częstochowa/Wręczyca | 60 | kW | 820 | km | 278 | ° |
19:15 | 88.60 | MHz | D | NDR Info | Garz (Rügen) (tent.) | 10 | kW | 1240 | km | 297 | ° |
19:15 | 92.20 | MHz | DNK | DR P4 Sjælland | Nakskov | 30 | kW | 1390 | km | 299 | ° |
All the stations were identified by playlists, podcasts, or parallel frequencies. Power values are ERP, distances are approximate.
RX: Airspy Mini SDR
ANT: 80 mb dipole
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