18 August 2020

Meteor scatter observations 12.08.2020 - 16.08.2020


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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