Frequency: 55.25 Mhz Transmitter: TV signal from Liege Bol d'air, Belgium. Receiver: Todmorden, UK. 53:42:00 N, 2:04:00 W. Path: Approx 500kM. Recording: from 18/11/02 12:00 UT, to 19/11/02 18:00 UT.
The setup is identical to previous year's recordings, 1999 and 2000.
The two large spikes at around longitude 236.67 and 236.79 were each due to single very strong overdense returns lasting several minutes.
Peak signal for the 1767 trail occured at 04:02 UTC +/- 3 mins.
No sign of a single strong peak corresponding to the 1866 trail. Instead a number of separate well defined peaks of modest average signal strength containing a large number of weak pings and head echoes.
A second TV carrier within the passband comes from Bagn, Norway, on 55.2513 Mhz and delivers a weaker signal, shown below.
The graph below shows both signals together.
Lack of correspondence between the sub-peaks of the two signals suggests that they don't carry meaningful information about the detailed density of the dust trails.
For those interested in turning their scanners to the skies, the following European band 1 TV transmitters deliver a reliable stream of background meteor pings in northern England. All are horizontally polarised.
Greipstad, NOR, 48.2528 Mhz, 50kW, 07e51/58n13, 795km.
Melhus, NOR, 48.2564 Mhz, 100kW, 10e22/63n59, 1340km.
Hemnes, NOR, 55.2487 Mhz, 70kW, 13e44/66n13, 1635km
Liege Bol d'Air 55.2500 Mhz, 05e33/50n35 100kW, 625km. (*)
Lousa, POR, 55.2500 Mhz, 06w11/40n25, 60kW, 1510km (*)
Bagn, NOR, 55.2513 Mhz, 09e37/60n49, 55kW, 1055km (*)
Kobenhavn, DNK, 62.0573 Mhz, 50kW, 12e30/55n44, 960km, (*)
Raichberg, D, 62.1927 Mhz, 100kW, 09e00/48n18, 980km, (*)
Lopik, HOL, 62.2135 Mhz, 05e03/52n01, 100kW, 510km (*)
Bremanger NOR, 62.2539 Mhz, 80kW, 05e00/61n53, 1000km (*)
Vuokatti, FIN, 72.1771 Mhz, 40kW 28e16/64n08, 2061km.
Data for the above list came from http://www.ukwtv.de/de/publikationen/tvlist/EU1.pdf . Those marked (*) are strong enough to be audible, the others are only visible on a spectrogram under normal conditions.