Radio Meteor Observation Bulletin No. 14 October 1994 1. FORWARD SCATTER METEOR OBSERVATIONS Observer: M. De Meyere Location: Deurle, Belgium (3 37' E, 51 00' N) Frequency: 66.17 MHz Transmitter Locations: Katowice, PR3, Poland, 65.99 MHz, 14 kW, Distance 1100 km P. Neant, PR3, Romania, 66.17 MHz, 40 kW, Distance 1400 km Czestochowa, PR3, Poland, 66.23 MHz, 20 kW, Distance 1080 km Gdansk, PR3, Poland, 66.29 MHz, 40 kW, Distance 1100 km Antenna: crossed Yagi, 4 elements, Azimuth 270 o (=East), elevation 30 o Antenna amplifier: 25 dB max level 90 dBmuV Receiver: commercial, Progresson 447A, TESLA, Bratislava Sensitivity: 8 muV for S/N = 26 dB (300 Ohm) Observing method: automated setup, 150 samples/second, 8 bit resolution. [Time and details of all individual meteor reflections are stored on file in the University of Ghent format (Prometeos), and are available for further analysis. Reduction software for DOS and Windows available]. Raw counts of reflections with a duration of at least 0.027 s during one hour interval starting at UT: September 1994 Sep | 1994 | 20h 21 22 23 00 01 02 03 04 05 06 07 --------------------------------------------------------------------- 1- 2 | - 52 55 51 1% 7% 50 94 118 90 103 - 2- 3 | 67 49 59 48 7% 0% 65 90 76 79 65 - 3- 4 | 36 68 50 50 33% 5% 18% 55 95 78 124 - 4- 5 | 49 65 47 46 10% 0% 53 76 74 81 96 - 5 -6 | 37 47 36 41 20% 2% 70 62 72 81 97 - 6- 7 | 40 60 56 45 21% 0% 49 75 89 69 61 - 7- 8 | 31 53 50 68 2% 10% 62 111 84 97 - - 8- 9 | 112 66 77 57 3% 1% 60 86 95 94 85 - 9-10 | 50 58 72 64 21% 2% 63 73 72 74 65 - 10-11 | 36 - - - - - - - - - - - 11-12 | - - - - - - - - - - - - 12-13 | - 44 43 36 7% 0% 40 43 46 61 - - 13-14 | 38 66 57 51 20% 4% 76 77 69 97 - - 14-15 | 35 50 37 50 14% 12% 38 74 81 78 67 - 15-16 | 26 46 60 57 51% 29% 64 83 97 89 81 - 16-17 | 33 45 56 44 35 9% 1% 31 61 61 59 - 17-18 | 50 45 40 45 13% 0% 54 81 90 73 70 - 18-19 | 40 36 39 41 1% 1% 26 75 64 61 44 - 19-20 | 42 49 58 55 4% 1% 30 62 83 69 64 - 20-21 | 37 48 59 60 29% 3% 27 63 58 64 55 - 21-22 | 29 39 35 32 2% 1% 26 54 54 58 39 - 22-23 | 37 36 32 53 9% 9% 16 58 48 55 63 - 23-24 | 50 51 42 62 50 21% 11% 13% 56 75 74 77 24-25 | 54 56 76 55 66 13% 0% 31% 64 74 76 44 25-26 | 39 38 58 76 30 3% 0% 26 44 63 66 46 26-27 | 43 46 52 36 34 6% 11% 42 50 63 46 63 27-28 | - - 55 28 38 4% 0% 19 50 57 64 54 28-29 | 39 40 66 29 26 11% 0% 38 59 44 58 41 29-30 | 44 42 38 47 31 4% 1% 26 50 68 55 60 ------|------------------------------------------------------------------ 1994 | 20h 21 22 23 00 01 02 03 04 05 06 07 Sep | Notes: . % : transmitter outage during the whole hour or a part of it. Low counts indicate that no other interference, which could be confused with meteors, is picked up. Few transmitters are broadcasting between 2h-4h local time (Sat-Sun 3h-5h local time) or sometimes longer. (When winter hour is in use: local time = UT + 1h). The switch to winter hour took place during the night of Sept 24-25. . & : manually eliminated for direct reception. M. De Meyere / C. Steyaert --------------------------------------------------------------------- Observer: Roger Stapleton Location: St. Andrews, Scotland (2 50' W, 56 20' N) Frequency: 70.31 MHz Transmitter Locations: Gdansk, Poland, 70.31 MHz, 40 kW Opole, Poland, 70.31 MHz, 60 kW Plzen, Czech Rep, 70.34 MHz, 30 kW Antenna: horizontal dipole, Azimuth 65 - 245 o (WSW - ENE) Receiver: Spectrum Communications 70 MHz to 144 MHz transverter feeding a Yaesu FT290-R, band pass 20 kHz. Observing method: the squelch circuit in the receiver is sampled by an Acorn BBC model B microcomputer. Counts of events during one hour bins starting at UT: | July 1994 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 -------------------------------------------------------------------- 0 | 11 10 10 11 1 6 4 2 30 - - - 5 5 4 5 1 | 7 13 8 19 1 14 4 3 6 - - - 6 5 2 6 2 | 22 9 1 31 0 16 8 2 6 - - - 4 2 4 27 3 | 12 21 10 25 & 21 13 12 19 - - - 38 3 18 23 4 | 17 41 27 38 5 12 6 6 14 - - - 33 35 20 & 5 | 33 41 24 50 13 26 3 11 19 - - - 23 12 36 17 6 | 62 28 54 30 11 5 12 21 9 - - - 9 10 17 14 7 | 42 57 39 30 20 15 & 15 7 - - - 17 12 12 27 8 | & 39 13 3 11 12 0 8 11 - - - 21 & & 13 9 | 46 35 - 15 6 7 2 28 22 - - - 17 5 23 16 10 | 57 39 - 26 7 22 5 11 16 - - - 23 & 3 16 11 | 32 33 - 31 8 7 20 9 12 - - - 22 & 14 6 12 | 21 28 - 27 18 17 8 10 4 - - - 35 13 14 4 13 | 35 34 - 16 8 11 4 2 12 - - - 3 12 29 10 14 | 30 41 - & 10 14 0 9 - - - - 11 8 8 8 15 | 55 10 - & 8 13 3 8 - - - - 6 5 38 3 16 | 41 & - 14 4 5 3 0 - - - - 27 2 5 1 17 | 9 & - 6 2 15 4 5 - - - - 12 11 5 5 18 | 91 & - 9 2 13 4 3 - - - - 2 6 10 10 19 | 84 & 4 10 0 2 17 5 - - - - 3 5 19 16 20 | 13 & 5 3 9 4 14 14 - - - 11 4 17 0 22 21 | 6 & 9 6 7 8 9 15 - - - 20 9 6 12 13 22 | 7 34 18 4 3 1 5 6 - - - 11 15 5 16 7 23 | 12 15 15 3 7 10 14 8 - - - 10 3 3 20 3 -------------------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | July 1994 UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 --------------------------------------------------------------- 0 | 8 6 7 9 6 4 2 14 5 7 13 12 16 8 44 1 | 7 12 2 4 5 8 5 4 11 7 15 22 11 7 50 2 | 4 5 7 15 11 6 3 12 9 15 19 14 16 & 25 3 | 8 7 12 6 8 13 4 11 18 64 44 36 41 & & 4 | 11 18 & 12 4 27 26 28 14 24 50 & & & 47 5 | 29 22 & 22 33 32 29 43 23 39 46 81 39 43 46 6 | 19 13 25 43 28 30 38 & 34 21 33 43 40 44 18 7 | 46 17 & 10 12 40 30 40 16 26 26 48 43 30 27 8 | 22 & & 17 7 19 28 54 & 6 11 40 27 25 9 9 | 17 & 23 12 8 11 25 41 35 2 20 19 9 32 - 10 | - & & 13 21 7 30 16 22 0 21 48 & 43 - 11 | - 12 & 10 6 10 26 29 20 0 20 29 67 18 - 12 | - 22 5 17 12 6 25 32 19 24 20 & & 38 - 13 | - 14 15 9 7 14 10 15 18 49 29 16 & 14 - 14 | - & 34 7 8 6 8 8 19 14 17 46 13 28 - 15 | - & 24 6 6 7 5 6 13 15 12 24 8 11 - 16 | - & & 8 5 6 6 12 5 11 14 29 13 12 - 17 | - & 8 5 3 10 15 23 6 10 5 9 3 11 - 18 | - & 22 3 17 4 8 8 2 12 62 17 6 28 - 19 | - 25 2 & & 7 4 6 1 15 19 9 11 38 - 20 | - 6 6 & & 4 12 10 3 & 8 & 40 40 - 21 | 6 13 2 3 21 20 11 18 13 & 34 30 23 34 28 22 | 12 11 15 9 21 9 10 13 20 24 25 30 33 27 41 23 | 9 13 14 6 26 20 27 12 13 20 49 21 & 44 44 ---------------------------------------------------------------- UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | Aug 1994 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 -------------------------------------------------------------------- 0 | 36 25 22 3 5 8 29 15 7 43 31 22 116 72 5 24 1 | 16 31 17 6 9 8 5 7 3 15 20 19 50 83 15 14 2 | 40 33 12 4 10 8 20 4 6 14 9 22 36 1 8 5 3 | 25 73 54 10 27 14 27 23 23 13 30 37 53 5 66 21 4 | 49 104 53 14 & 27 24 19 41 26 50 101*102 95 44 43 5 | 58 57 76 12 28 17 47 25 41 49 30 72* 96 58 23 22 6 | 51 26 32 23 36 22 7 25 39 15 41 77* 55 85 26 21 7 | 56 86 29 12 27 28 20 5 26 35 11 162* 82 62 48 30 8 | 46 40 72 6 49 25 19 1 38 10 42 108* 57 78 & 42 9 | 14 35 30 10 27 22 19 - 67 0 14 84* 78 28 52 24 10 | 23 37 40 13 22 19 17 - 36 16 25 - 103 31 66 22 11 | 8 15 35 19 27 14 29 4 15 21 83 - 113 46 46 52 12 | 2 51 41 16 19 15 27 11 29 21 29 - 147 67 17 65 13 | 21 58 41 5 44 7 24 16 24 38 32 - 45 50 16 35 14 | 21 29 23 77 0 4 16 19 39 16 29 49* & 25 43 23 15 | 39 18 70 2 16 22 83 18 32 13 16 114* & 13 19 4 16 | 8 4 33 10 6 23 3 18 29 19 22 52* 21 22 14 20 17 | 14 14 27 50 11 5 21 6 28 33 11 112* 59 4 17 10 18 | 34 47 18 5 8 14 15 17 35 10 3 39 21 46 11 8 19 | 28 5 13 10 12 15 20 25 27 9 26 101 33 35 21 18 20 | 14 15 25 28 12 16 8 40 25 20 25 68 14 30 10 14 21 | 23 9 11 14 24 15 30 44 44 21 44 65 62 48 24 18 22 | 21 22 28 29 28 46 22 16 26 28 48 68 44 42 22 15 23 | 33 34 33 49 17 14 77 62 32 61 69 82 62 44 30 28 -------------------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Aug 1994 UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 --------------------------------------------------------------- 0 | 25 27 7 8 23 2 6 7 3 7 8 38 33 43 20 1 | 9 8 11 15 15 11 7 16 4 9 8 11 4 8 8 2 | 18 12 18 17 6 12 14 10 26 17 7 22 19 13 20 3 | 50 15 21 14 12 16 11 22 50 15 33 10 21 34 23 4 | 61 38 38 39 31 39 39 25 38 60 26 49 34 38 25 5 | 21 42 31 51 50 23 43 21 60 34 34 33 35 20 26 6 | 24 45 43 48 84 34 18 21 19 41 30 54 29 36 28 7 | 17 21 34 42 31 28 18 22 24 41 39 40 44 22 22 8 | 43 - 33 21 43 23 7 34 57 42 48 31 32 35 9 9 | 29 - 41 37 24 29 2 44 45 52 35 - 22 21 17 10 | 29 - 45 18 41 24 28 31 26 27 29 - 21 20 39 11 | 23 - 36 20 38 23 2 38 24 21 17 - 13 32 15 12 | 16 - 24 34 37 18 8 21 21 37 16 - 20 19 6 13 | 21 - 32 11 17 17 1 16 11 23 21 16 22 8 7 14 | 10 - 47 14 35 7 10 3 15 28 23 41 14 8 8 15 | 9 - 8 17 16 12 2 11 8 13 11 8 16 3 12 16 | 24 - 4 23 13 21 2 10 8 15 7 3 13 3 2 17 | 10 - 24 21 7 20 4 12 10 4 5 11 7 14 6 18 | 9 - 6 9 5 8 19 13 8 11 14 15 4 2 8 19 | 32 - 11 14 9 3 10 13 7 13 15 26 6 17 9 20 | 28 - 10 10 12 3 8 7 11 9 35 3 15 8 2 21 | 13 10 17 11 14 17 32 16 19 30 9 10 22 4 9 22 | 23 40 42 26 20 23 50 18 24 26 22 13 22 28 19 23 | 48 20 32 28 20 40 21 26 23 18 34 27 31 21 17 ---------------------------------------------------------------- UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 . & : affected by direct reception. The criterion used: average duration during the hour > 1 s. . * High Perseid activity on Aug 12 between 4 and 17 h UT (unfortunately no observations between 10-12 h UT, when the anomalous peak took place). R. Stapleton / C. Steyaert ----------------------------------------------------------------- Observer: George J. Zay Location: Descanso, California, USA (116 38' W, 32 50' N) Height above sealevel: 1003 m Frequency: 92.90 MHz Transmitter Location: Flagstaff, Arizona Distance: 538 Km Transmitter Power: 100 kW; 24h/day and 7 days a week Antenna: 6 element Yagi, Azimuth 60 o, Elevation 45 o Receiver: JVC RX-302BK Digital Receiver Observing method: Listening Raw counts of reflections during one hour interval starting at UT: June | 1994 | 05h 06 07 08 09 10 11 12 ------------------------------------------------ 20 | 18 23 21 22 44 33 46 24& 22 | 17 24 17 31 38 - - - ----------------------------------------------- | 05h 06 07 08 09 10 11 12 July | 1994 | 04h 05 06 07 08 09 10 11 12 ---------------------------------------------------- 2 | - 07 22 15 40 25 29 28 24& 3 | - 13 22 21 28 35 34 34 28 28 | 12 27 52 62 90 30& - - - ---------------------------------------------------- | 04h 05 06 07 08 09 10 11 12 Aug | 1994 | 03h 04 05 06 07 08 09 10 11 12 --------------------------------------------------------- 7 | - 16 19 35 16& - - - 29* 43 9 | 06 20 34 35 64 63 27& - - - 10 | 08 09& - - - - - - - - 13 | 08 06 21 19 30 59 48 42 44 - 14 | 09 10 06 10 25 28 11& 16 20 - --------------------------------------------------------- | 03h 04 05 06 07 08 09 10 11 12 & : first 30 minutes of the interval * : last 30 minutes of the interval George J. Zay / reported by Jeroen Van Wassenhove 2. ABOUT THE RMOB The RMOB is an independent initiative of some workers in the field of radio meteor scatter observations and data reduction. It started in August 1993 in order to spread rapidly the Perseid results via E-mail. Since then, it has appeared monthly, and has gradually been expanded. Typically it contains: summaries of recent observations, first results of stream activity by radio methods, relations between radio and optical meteors, references to other publications in the field of meteor astronomy and radio scatter techniques, announcements of meetings, short questions and answers, non-commercial (second hand) sale of radio equipment, available software. Contributors are mentioned, and interested persons are asked to contact them directly. RMOB can be copied freely in unabridged and unmodified form. Extracts should indicate the source (Radio Meteor Obs Bulletin, month and year). If you want to subscribe (or unsubscribe) to the E-mail distribution list, please send a message to C. Steyaert. Those not having access to E-mail can obtain a printed copy free of charge from J. Van Wassenhove (current or back-issues). 3. CONTRIBUTORS / USEFUL ADDRESSES Maurice De Meyere Hullekensstraat 24, B 9831 Deurle, Belgium tel: +32 (9) 282 35 26 Call: ON4NU, packet: ON4NU@ON4AWP E-mail: via Chris Steyaert Roger Stapleton St. Andrews, Scotland E-mail: jrs@st-and.ac.uk Chris Steyaert, VVS Kruisven 66, B 2400 Mol, Belgium tel: +32 (14) 31 51 04 fax: +32 (14) 22 13 73 E-mail: steyaert@vvs.innet.be Jeroen Van Wassenhove, VVS 's Gravenstraat 66, B 9810 Nazareth, Belgium tel: +32 (9)385 61 09 E-mail: 100101.734@compuserve.com Paul Vauterin, University of Ghent, Astronomical Observatory E-mail: paul@izar.rug.ac.be George J. Zay 3946 Paula Street La Mesa, CA 91941, U.S.A. -- Christian Steyaert (RMOB9409) 8 October 1994 --