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(meteorobs) Radio Meteor Obs. Bull. Oct 1998 Draconids
Radio Meteor Observation Bulletin No. 63 November 1998
1. FORWARD SCATTER METEOR OBSERVATIONS
Observer: Enric Fraile Algeciras
Location: Paseo Bonanova, 8 BARCELONA (02 07'E, 41 24' N)
Frequency: 48.24715 MHz.
Transmitter Location: still working to identify, possibly South German C2,
100 kW, horizontal polarisation)
Antenna: 6-element Yagi 617-6B, 14 dBd gain.
astronomical azimuth 215 deg (=NE), elevation 0 deg.
Antenna: Six element Yagi 617-6B, 14 dBi gain, horizontal polariz.
Azimuth 200 deg (NE), elevation 20 deg
Receiver: home made converter 20 dB gain, 1 dB noise and Kenwood TS-830S.
10 dB attenuator in the receiver to reduce direct reception
Sensitivity: 0.25 uV for 10 dB S/N
Observing method: the audio signal of the video carrier is received using
a narrow CW filter (500 Hz) and fed into the PC in real time.
Data sampling system: using a super 14 bits A/D card to PC/XT
and "Data Capture" software with 1 second/18 sampling interval
to store all the > 0.5 s reflections.
| Oct 1998
UT | 23 24 25 26 27 28 29 30 31
----+----------------------------------------
0 | 46 23 16 21 25 22 24 5
1 | 31 42 24 24 18 10 16 14
2 | 27 35 10 13 27 28 14 24
3 | 57 35 24 13 22 15 17 21
4 | 33 35 18 9 16 12 13 17
5 | 30 40 25 11 14 19 23 17
6 | 38 39 24 11 14 13 16 22
7 | 21 16 29 38 13 21 20 13
8 | 24 10 32 22 15 27 17 28
9 | 36 24 21 16 22 19 21 8
10 | 13 14 17 12 10 14 12
11 | 27 9 8 10 16 10 7
12 | 9 17 3 19 12 5 7 17
13 | 20 13 5 7 5 11
14 | 13 15 15 19 7 6 12
15 | 6 29 5 7 12 4 8
16 | 12 5 10 3 11 11
17 | 8 9 7 5 9 12 4
18 | 6 8 10 16 11 10
19 | 2 13 17 11 13 17
20 | 28 14 19 25 21 22 30
21 | 26 14 30 22 16 19 26 14
22 | 16 23 44 25 21 13 20 21
23 | 28 14 31 39 15 13 21 27
----+----------------------------------------
| Oct 1998
Notes:
. the new location is in the University Ramon llull LA SALLE Enginyeria
Arquitectura is ready and I have the collaboration of the Communications
Department to improve the system.
Now the radio-city (Barcelona) noise is terrible about 35 dB more than
my old location! Also I'm very near to Barcelona TV1 C4.
I tried to receive the C2 in Torrespana (48.25020 MHz) but I have poor
reflections and time to time receive the signal by Ionospheric Scatter.
Enric Fraile Algeciras
---------------------------------------------------------------------------
Observer: Michael Boschat
Location: Halifax, Canada (63 36'W, 44 39'N, 58 meters above sea level)
Listening Frequency: 83.25 MHz
Receiver: Icom R-10
Antenna : resonant dipole
Antenna Direction: Horizontally polarized with lobes in E-W plane, elev 0 deg
Filter : high-Q (Q at least 300) bandpass filter between antenna & receiver.
Listening Mode: AM
Recording method: listening by ear
October 1998
Number of meteors heard in one hour interval
| UT
Oct | 10h 11 12 13 14 15 16 17 18 19 20
----+-------------------------------------------
1 | - - 1 1 2 - - - - - -
2 | - 9 2 3 2 - - - - - -
3 | - - - - - - - - - - -
4 | - - - - - - - - - - 5
5 | - - - - - - - - - - -
6 | - 10 9 11 37 35 - - - - -
7 | - - - - - - - - - - -
8 | - - - - - - - - - - -
9 | - - - - - - - - - - -
10 | - 8 4 5 4 1 - - - - -
11 | - - 19 28 24 23 12 8 - - -
12 | - 5 2 3 - - - - - - -
13 | 3 5 - - 11 10 - - - - -
14 | 5 15 - - 5 - - - - - -
15 | - - - 30 33 20 13 7 - - -
16 | - - 36 8 47 43 29 27 25 - -
17 | - - 22 23 19 20 - - - - -
18 | - 29 41 26 16 17 - - - - -
19 | 4 7 13 11 25 13 - - - - -
------------------------------------------------
29 | 11 16 14 11 - - - - - - -
30 | - 16 7 - - - - - - - -
31 | - - - - - - - - - - -
----+-------------------------------------------
Oct | 10 11 12 13 14 15 16 17 18 19 20
| UT
Notes:
. no corrections for radiant position made to the counts.
. (-) means no observations made.
. Active showers: Draconids maximum on Oct. 8
Epsilon Geminids Oct. 18
Orionids Oct. 21
. equipment problems between Oct 20-28, no data recorded
Mike Boschat
---------------------------------------------------------------------------
Observer: Giorgio Bressan, Associazione Friulana di Astronomia e
Meteorologia (AFAM)
Location: Remanzacco, near Udine, Italy (13.3 E, 46.1 N)
Antenna: A.) 4 el. Yagi, dir. south
B.) 3 el. Yagi, dir NNE
Frequency: A.) 53.7592 Mhz, USB mode
B.) 49.73885 Mhz, USB mode
Transmitter: A.) TV video carrier, south Italy
B.) TV video carrier, either Praha (NNE) or Budapest (NE)
Observing method: automatic setup using FFTDSP software to record the
total power of the channels A.) and B.). 40 Hz bandwidth
are used for meteor identification, pictures with interference
are manually rejected.
| > 0.5 s > 3.5 s > 6.5 s > 12 s
| count count count count
UT| 7 8 Oct 7 8 Oct 7 8 Oct 7 8 Oct 7, 8, Oct
--+----------- ---------- ---------- ---------- ------------
0| 103 0 0 0 , 3,
1| 119 2 1 0 , 20,
2| 167 3 1 1 , 19,
3| 122 2 1 0 , 11,
4| 117 3 1 0 , 21,
5| 100 2 0 0 , 12,
6| 108 4 0 0 , 10,
7| 106 12 1 0 , 28,
8| 75 3 1 0 , 18,
9| 80 5 0 0 , 18,
10| 99 7 4 0 , 31,
11| 124 10 1 0 , 40, <---
12| 175 20 2 0 , 68, <---
13| 159 7 0 0 , 38, <---
14| 18 0 0 0 , 4,
15| 110. 0. 0. 0. , 16,
16| 34. 91. 0. 3. 0. 2. 0. 0. 0, 16,
17| 46 98 6 1 1 0 0 0 22, 8,
18| 44 80 1 3 0 1 0 1 4, 17,
19| 81 124. 4 5. 0 0. 0 0. 10, 14,
20| 94 3 0 0 9, ,
21|120 6 2 0 24, ,
22|103. 2. 0. 0. 8, ,
23| 96. 2. 0. 0. 3, ,
---+----------- ---------- ---------- ---------- -----------
UT| 7 8 Oct 7 8 Oct 7 8 Oct 7 8 Oct 7, 8, Oct
Notes:
. the low values at 14h UT are due to less interference, which resulted in
lower counts, while the meteor echoes are still there but not counted by
the software during this hour.
. the shape of the Draconids outburst was not symmetric, but showed a slow
ascending slope and a faster descending one:
- 10:15 UT: no long meteor reflections
10:15 - 11:15 UT: activity building up, but seems to remain on the same
level, Draconids show up as long echos of up to 20 seconds length.
11:50 - 12:50 UT: activity increases very much, long reflections as before.
12:50 - 13:13 UT: highest activity, with the echos overlapping each other.
13:13 - 13:30 UT: fast decrease, echos again up to 20 seconds length
13:30 - 16:10 UT: weak activity, looks same as from 10:15-11:15)
Giorgio Bressan / via Werfried Kuneth
---------------------------------------------------------------------------
Observer: Eisse Pieter (Peter) Bus
Location: Groningen, Netherlands (6 deg 33' E, 53 deg 13' N)
Frequency: 72.11 MHz
Transmitter Location: Wroclaw, Poland, 130 kW, distance 740 km
Antenna: Yagi, 3 elements, geographical azimuth 106 deg (ESE),
elevation 13 deg
Receiver: Bearcat UBC 860 XLT Scanning Radio, sensitivity: 0.5 uV
Observing method: Listening and counting in 5-minute intervals.
Mean "sporadic" activity of 3, 10 and 11 October 1998:
(hourly rates starting at UT)
7h 8 9 10 11 12 13 14 17 18 19 20
-----------------------------------------------
91 92 68 84 95 88 68 68 62 59 91 83
Long lasting reflections (>1 s):
7h 8 9 10 11 12 13 14 17 18 19 20
-----------------------------------------------
8 5 6 8
Uncorrected counts observed on October 8, 1998:
(hourly rates starting at UT)
7h 8 9 10 11 12 13 14 17 18 19 20
------------------------------------------------------
112 89 115 101 181 201 224 92 56 67 85 108
Uncorrected long-lasting reflections >1 s on October 8, 1998.
(hourly rates starting at UT)
7h 8 9 10 11 12 13 14 17 18 19 20
-----------------------------------------------
12 14 26 35 64 81 75 32 6 6 12 8
Uncorrected long-lasting reflections >1 s on October 8, 1998.
(total reflection-time in minutes)
7h 8 9 10 11 12 13 14 17 18 19 20
------------------------------------------------------------
0.5 2.0 2.3 1.7 3.7 12.2 11.4 2.3 0.1 0.2 0.3 0.3
Counts per 30-minute intervals corrected for dead-time, "sporadics"
and observability function show for the Draconids a half-wide maximum
at 12h55m UT = solar longitude 195.065 degrees (2000.0).
However, counts per 10-minute intervals show a half-wide maximum at
13h10m UT = solar longitude 195.075 degrees.
Note: between about 12h55m and 13h05m saturation of the signals occurred.
Therefore no individual reflections were counted during this period.
Between about 14h40m and 17h UT interference (probably caused by nearby
computers) obscured the observations.
Peter Bus
---------------------------------------------------------------------------
Observer: Maurice De Meyere
Location: Deurle, Belgium (3 37' E, 51 00' N)
Frequency: 66.51 MHz
Transmitter locations (all stations of more than 10 kW):
66.35 MHz, Klaipeda, Lithuania 12 kW, 05h00-22h00
66.47 Viesintos Lithuania 12 05h00-22h00
66.62 Budapest Hungary 100 24hrs
66.68 Valmiera Latvia 20 04h30-22h00
Antenna: crossed Yagi, 4 elements, astronomical azimuth 270 deg (= E),
elevation 27 deg.
Antenna amplifier: 25 dB max level 90 dBmuV
Receiver: commercial, Progresson 447A, TESLA (Bratislava)
The receiver was calibrated with a Marconi TF2008 signal
generator. Sensitivity: 5 muV (modulation frequency
1000 Hz, frequency sweep 38 kHz) at (S+N)/N = 20 dB.
SWR of antenna alone at 66.5 MHz: 1.4/1 (good to very good),
measured with MFJ/259P SWR analyzer (HF-VHF 1.8 MHz to 170 MHz)
on Sep 28, 1998.
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].
October 1998
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Oct | UT
1998 | 20h 21 22 23 00 01 02 03 04 05 06 07
------+------------------------------------------------------------
1- 2 | 27 41 47 64 45 59 105 128 143 149 97
2- 3 | 15 35 15 65 50 48 77 88 133 143 121
3- 4 | 18 29 26 63 65 67 62 103 103 100 161?
4- 5 | 18 25 36 55 47 67 63 105 104 201? 116
5- 6 | 27 34 45 57 72 59 102 108 127 108 137?
6- 7 | 16 23 49 68 71 47 96 103 111 107 112
7- 8 | 20 34 68 68 55 62 90 94 108 127 91
8- 9 | 75 94 62 65 54 84 107 127 94 121 99
9-10 | 60 76 75 58 63 78 ? ? ? ? ?
10-11 | 49 61 79 65 61 74 83 91 110 98 91
11-12 | 22 29 53 58 70 82 88 123 145 132 104
12-13 | 41 33 39 51 74 74 89 104 115 96 93
13-14 | 20 39 40 62 79 69 117 114 96 113 71
14-15 | 25 52 78 87 88 84 143 129 120 145 160
15-16 | 31 35 56 57 71 114 121 229 130 169 129
16-17 | 32 39 59 83 55 71 102 164 120 130 181
17-18 | 20 43 55 51 64 83 69 151 129 106 158
18-19 |
19-20 | 13 36 39 58 96 95 139 173 160 202 147
20-21 | 37 75 95 53 75 102 173 209 209 236 105
21-22 | 31 71 59 74 73 87 134 117 129 149 226
22-23 | 27 70 55 83 85 94 165 179 152 195 106
23-24 |
24-25 |
25-26 | 17 66 55 61 55 99 113 107 163 166 157
26-27 | 41 21 40 51 96 109 128 149 146 167 97
27-28 | 39 59 60 87 52 79 88 116 140 131 89
28-29 | 24 48 60 98 71 67 85 115 81 106 57
29-30 | 36 45 55 75 69 80 150 155 186? 167? 76
30-31 | 31 82 92 81 98 93 113 96 108 109 100
31- 1 | 28 39 48 93 59 90 77 156 105 122 92
------+------------------------------------------------------------
1998 | 20h 21 22 23 00 01 02 03 04 05 06 07
Oct | UT
Extra observations at the occasion of the Draconids:
Oct | UT
1998 | 17h 18 19
------+---------------
8- 9 | 20 23 41
9-10 | 18 30 54
10-11 | 14 26 44
Raw counts of reflections with a duration of at least 1.000 s
during one hour interval starting at UT:
Oct | UT
1998 | 20h 21 22 23 00 01 02 03 04 05 06 07
------+------------------------------------------------------------
1- 2 | 1 8 6 12 5 6 14 17 19 27 18
2- 3 | 2 6 1 18* 9 2 14 14 34* 18 24
3- 4 | 4* 0 3 10 12 9 4 8 13 12 38?
4- 5 | 3 6* 5 9 4 12 9 15 11 52? 17
5- 6 | 5 3 5 4 12 8 13 20 14 12 30?
6- 7 | 1 1 6 5 12 7 12 12 12 12 19
7- 8 | 1 2 8 9 8 5 3 13 9 25 7
8- 9 | 7 17 5 12 4 12 17 18 9 13 11
9-10 | 11 8 9 7 7 12 ? ? ? ? ?
10-11 | 3 6 11 14* 5 10 11 8 12 15 13
11-12 | 3 2 9 13* 12 13 16 21 24 22 22*
12-13 | 12* 6 3 10 7 12 15 20 11 17 8
13-14 | 3 5 7 9 16* 7 14 10 11 14 12
14-15 | 0 6 11 14 11 12 16 13 17 24 30
15-16 | 1 6 8 10 9 22 16 34 15 21 23
16-17 | 6 7 9 16 5 7 7 27 11 14 47*
17-18 | 1 5 3 7 10 17* 8 18 14 16 36*
18-19 |
19-20 | 1 5 5 8 17 12 22 25 31 46* 20
20-21 | 6 13 17 8 10 10 37* 26 35 41 36*
21-22 | 2 14 6 5 7 14 27* 17 15 23 51*
22-23 | 3 11 6 12 12 11 26 18 26 24 16
23-24 |
24-25 |
25-26 | 2 19* 11 8 8 23* 18 10 35* 22 30
26-27 | 2 3 10* 11* 14 30* 11 25 20 24 10
27-28 | 8* 9 8 19* 7 5 8 13 26 26 9
28-29 | 1 5 7 24* 9 4 10 14 6 15 7
29-30 | 4 7 7 9 5 12 21 26 26? 26? 10
30-31 | 4 25* 13 8 17 16 14 9 11 5 20
31- 1 | 8* 2 4 13 9 12 14 31 17 12 14
------+------------------------------------------------------------
1998 | 20h 21 22 23 00 01 02 03 04 05 06 07
Oct | UT
Notes:
. ? probably affected by sporadic-E, direct reception.
. thunderstorm on Oct 23-24, storm on Oct 24-25.
. * warning for relative high number of long duration reflections,
an indication for potential stream activity.
. switch to winter hour (local time = UT + 1 hours) on Oct 25
Maurice De Meyere
----------------------------------------------------------------------
Location: Astronomical Observatory, University of Ghent, Belgium
(3 42' 32" E, 51 01' 25" N)
Antenna (2x): 4 elements horizontal Yagi, pointed East, elevation= 20 deg
Antenna amplifier: 10 dB gain
Frequency: (1)=66.29 MHz (signal) and (2)=65.3 MHz (interference control)
Receiver (2x): modified commercial FM receiver
Data acquisition: 12 bits PC-based A/D convertor, 250 Hz sampling rate
Interference rejection:
dual setup: receiver (1) tuned at distant transmitter, receiver (2)
tuned at empty frequency. Anti-coincidence measurement rejects
registration of broadbanded spurious signals (lightning, computers,
ignition motors, etc).
Further information:
see WWW page (additional info + observational data)
http://allserv.rug.acdot be/~hdejongh/astro/meteor/meteor.html
Data format:
results are shown as total reflection time, expressed as
a percentage. The actual number shows 10 times this value.
When no figure is shown, the equipment was either out of service,
or results could have been affected by interference, sporadic-E.
-------------------------------------------------------------
| Oct 1998 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 28 45 25 36 39 36 32 32 33 29 45 33 25 34 39
1 | 28 30 29 31 43 29 32 31 33 34 36 72 25 36 31
2 | 36 36 30 26 44 35 39 25 77 42 38 39 32 28 37
3 | 41 43 35 59 67 63 33 50 46 36 36 56 51 57 34
4 | 39 74 48 45 91 38 48 34 37 44 39 64 35 32 32
5 | 68 81 97 41 58 48 50 91 50 66 44 80 46 36 75
6 | 59 90 61 71 28 46 49 28 46 59 38 47 41 46 41
7 | 47 65 84 122 18 23 91 36 34 52 47 27 22 40 43
8 | 42 69 71 63 33 19 50 66 21 38 48 16 29 14 36
9 | 43 45 47 60 19 18 41 36 13 36 52 21 24 31 21
10 | 30 49 47 56 38 24 22 29 13 27 37 8 29 27 13
11 | 37 19 46 53 46 15 11 16 13 34 22 6 13 25 11
12 | 28 22 82 22 22 17 9 19 10 22 7 15 16 7
13 | 13 15 34 21 21 7 13 19 8 11 4 10 24 36
14 | 8 3 12 8 8 4 6 13 11 15 4 13 8 11
15 | 6 8 9 9 7 5 7 27 11 12 23 4 17 14 20
16 | 9 10 14 12 13 16 8 20 15 16 20 4 7 9 18
17 | 8 20 12 12 13 12 10 14 10 13 9 9 11 10 23
18 | 12 26 16 23 23 16 10 11 16 18 10 16 14 26 19
19 | 25 18 22 27 26 17 20 29 16 29 25 25 23 16 28
20 | 25 33 33 37 32 25 30 25 29 26 20 28 23 29 24
21 | 23 27 25 34 44 27 29 23 29 31 33 27 23 23 27
22 | 27 22 39 26 43 29 39 18 29 24 27 28 32 28 41
23 | 32 27 37 37 33 34 49 21 27 30 31 25 33 35 26
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
--------------------------------------------------------------
| Oct 1998 | 10x % reflec. time | horiz: day | vert: time UT |
--------------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
---+----------------------------------------------------------------
0 | 29 34 50 52 39 54 66 73 62 37 46 50 52 71 33 45
1 | 46 32 35 44 55 48 124 59 68 39 56 40 44 56 47 48
2 | 43 37 34 42 39 62 133 119 77 46 55 53 48 33 83 51
3 | 64 53 65 69 112 117 154 77 80 82 49 43 60 65 83 48
4 | 38 29 53 72 105 75 125 77 124 57 78 62 58 67 73 56
5 | 37 48 50 48 58 98 221 126 127 67 78 65 69 62 65 84
6 | 23 40 68 58 61 61 127 98 58 60 76 114 82 54 64 56
7 | 20 48 27 20 102 50 131 64 66 59 39 57 47 34 45 66
8 | 21 22 42 4 48 47 96 29 66 55 61 70 45 34 39 60
9 | 23 20 32 1 34 34 86 45 82 48 27 62 25 36 28 37
10 | 12 20 25 7 54 30 39 32 26 36 63 14 29 32 43
11 | 10 37 21 15 14 19 33 23 38 22 25 31 17 31 37
12 | 6 18 20 20 27 27 37 100 54 18 24 28 23 25 49
13 | 6 11 17 19 20 18 5 11 73 43 5 16 23 45 13 14
14 | 10 14 24 3 3 18 7 17 70 14 23 18 17 20 22 10
15 | 21 11 8 6 5 8 6 10 14 10 5 21 13 23 27 16
16 | 42 24 15 11 12 26 7 13 5 30 11 10 15 28 40 10
17 | 16 9 18 10 29 13 13 12 10 19 28 18 21 14 20 23
18 | 22 14 13 10 13 19 16 30 19 15 16 60 33 33
19 | 19 15 19 17 30 19 22 39 38 26 51 39 61 53
20 | 25 42 30 33 35 33 30 23 38 35 39 39 41 38 58 63
21 | 27 52 27 26 25 58 39 40 35 33 49 62 47 60 46 70
22 | 30 31 28 28 38 54 77 39 30 62 32 45 47 49 58 62
23 | 36 37 43 38 28 39 38 54 40 42 39 45 43 43 50 35
---+----------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Notes:
. hardly any Draconids activity noticeably, probably due to unfavourable
geometrical conditions!
. Orionids maximum on Oct 22
Pierre De Groote
---------------------------------------------------------------------------
Observer: Will Kelsey
Location: Santa Maria, CA. USA (120 26' 9" W, 34 55' 58" N)
Frequency: 98.5 MHz
Transmitter Location: Sacramento, CA. KRAK FM, 50 kW at 362 km.
Antenna: Yagi FM 6 element. Heading North
Receiver: Sangean 803 A
Observing Method: Listening to audio recording.
Underdense/Overdense Scale:
C-Dense: 0.5 second or less
B-Dense: 0.5 to 3.0 seconds
X-Dense: 3.0 seconds or more
Estimated Signal Amplitude (ESA): 1 to 99 maximum
Interference (INT): Lo Med Hi
Each observation hour is recorded in three 20 minute intervals
____________________________________________________________________
October
1998 hr-UT X-Dense B-Dense C-Dense ESA INT Total
--------------------------------------------------------------------
1 DAU 0920-1020 1-2-2 3-12- 7 48 Med 27
2 DAU 0920-1020 1-2-1 1- 5- 6 44 Med 16
3 OAR 1030-1130 4-1-2 4- 1- 4 25 Lo 16
4 OAR 1030-1130 3-2-3 2-10- 8 47 None 28
5 OAR 1030-1130 5-3-7 10- 9-11 42 None 45
6 OAR 1030-1130 5-6-5 11- 9- 4 55 None 40
7 GIA 0300-0400 1-0-1 2-1-7 5- 4- 7 61 Lo 28
7 OAR 1030-1130 2-6-6 11- 8- 8 39 None 41
8 GIA 0300-0400 1-1-1 2-2-4 3- 3- 5 68 Lo 22
8 OAR 1100-1200 5-3-5 6- 3- 6 61 None 28
8 GIA 2040-2140 1-0-0 1-1-1 4- 0- 4 67 Med 12
9 GIA 0240-0340 2-1-3 2- 1- 4 62 Lo 13
9 DAU 0900-1000 3-7-4 9-16- 5 55 None 44
10 DAU 0900-1000 5-9-6 6- 7-14 32 None 47
10 DAU 1520-1620 0-1-1 4-3-3 7- 5- 6 50 Lo 30
11 DAU 0845-0945 3-3-2 6- 4- 4 45 Lo 22
12 ORI 0930-1030 3-4-3 6- 3- 3 55 Lo 22
13 ORI 0930-1030 2-3-3 6- 6- 8 36 None 28
14 ORI 0930-1030 1-1-2 2-2-8 4- 3- 5 57 None 28
15 ORI 0950-1050 4-3-4 6- 5- 8 47 None 30
16 ORI 0950-1050 7-3-2 10- 9- 5 25 None 36
17 ORI 0900-1000 1-0-0 4-3-5 6- 9- 8 56 None 36
18 ORI 0900-1000 5-2-4 9- 9-11 43 None 40
19 ORI 0840-0940 1-1-0 4-4-3 4- 9- 8 32 None 34
20 ORI 1000-1100 1-1-0 5-6-5 17-18- 8 38 None 61
21 ORI 1000-1100 1-0-1 9-7-10 13-21-16 36 None 78
22 ORI 1000-1100 0-2-1 8-6-5 7-19-16 42 None 64
23 ORI 1000-1100 0-0-1 8-10-8 8-14-12 34 None 61
24 ORI 1000-1100 2-2-3 10-16- 9 45 None 42
25 ORI 1000-1100 5-6-9 11-12-15 38 None 58
26 ORI 1000-1100 9-4-8 15-10- 9 53 None 55
27 ORI 1000-1100 2-5-4 3- 9- 6 45 None 29
28 ORI 0900-1000 4-3-4 6- 9- 7 36 None 33
29 STA 1130-1230 1-1-0 6-5-4 4-16- 2 59 None 39
30 STA 1130-1230 0-0-1 6-2-7 7- 4- 7 44 None 34
31 STA 1130-1230 0-1-0 5-6-4 10- 7- 9 52 None 42
--------------------------------------------------------------------
1998 hr-UT X-Dense B-Dense C-Dense ESA INT Total
October
Notes:
. activity period of streams with radiant at 45 deg elevation:
DAU: Delta Aurigids Area
GIA: Giacobinids (Draconids)
ORI: Orionids
STA: Southern Taurids
Will Kelsey
---------------------------------------------------------------------------
Observer: Werfried Kuneth
Location: Ferndorf, Austria (13 37' E, 46 45' N)
Antenna: 2 element Yagi, direction southeast, no elevation at 1m height.
Receiver: IC-706 at 53.76065 MHz, CW-R mode, 500 Hz CW filter, fast AGC.
Transmitters: 1) 30 kW TV video carrier from Bari, Italy, distance 700 km,
direction south and 2) a 30 kW TV video carrier from Sicilia,
Italy, distance 900 km, south. The total echo power of both
transmitters is processed into same 40 Hz virtual
receiver channel.
Observing method: automatic setup using FFTDSP42t software by AF9Y to record
the audio signal. 20 channels of 2 Hz width are used for meteor
identification, pictures with interference, are manually rejected.
Sampling interval: one 4096 point FFT every 0.5 seconds.
The meteor counts below are corrected for a full hour observing time. If
the recording duration is 20-40 minutes, a dot is shown after the value, to
show the reduced accuracy. Results for less than 20 min. observing time are
excluded.
Counts of reflections longer than 6.5 seconds,
assumed to be overdense.
| Oct 1998
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
---+----------------------------------------------------------------
0| 3 4 2 0 4 4 1 1 3 4 2 1 3 4 1
1| 4 1 5 2 10. 1 3 2 3 8 2 3 6 3 4
2| 3 7 4 2 4 6 6 6 3 6 7 4 6 3 0 6
3| 6 5 2 3 4 6 2 0 7 3 7 11 4 6 6
4| 8 6 11 4 7 8 4 4 4 6 3 4 10 3 3
5| 2 10 7 8 4 7 4 4 1 3 6 8 4 7 17
6| 7 13 6 15 7 5 3 6 6 8 4 6 7 1 4 7
7| 6 19 13 10 2 10 8 12 6 2 9 11 3 8 5 10
8| 4 13 11 3 2 11 7 8 10 3 5 6 6 3 9 3
9| 5 7 12 13. 4 17 4 7 1 3 4 8 5 6 8 13.
10| 9 10 5 8 10 7 4 7 6 8 7 9 1 8 2. 5
11| 4 5 11 9 7 8 4 18 7 11 8 11 3 2
12| 5 4 6 4 2 4 5 25 4. 4 2 3 3 1
13| 2 4 1 0 3 3 2 40 0 0 2 9 5. 1
14| 2. 0 0 2 0 3 4 4 2 3 1 4 4. 0 0
15| 0. 0 1 2 3 0 2 4 1 0 1 0 1 0
16| 1 4 1 1 0. 1 1 1 2. 0 2. 0 1
17| 1 0 0 0 0 0. 4 2 1 0. 0. 1
18| 0 0 0 2 1 0 1 1 1 3 1 3 2 4
19| 2 0 1 3 2 0. 3 2 3 2 1 0 1 2
20| 1 1 2 3 0 0. 2 2 3 0. 6. 1 2 3 4
21| 1 7 1 5 4 7 3 2 4 5 0 0 4 5
22| 4 0 2 1 0 1 2 3 0 4 4 2 1 1 4
23| 1 3 0 4 2 2 0 4 2 5 2 1 2. 2 5
---+----------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
| Oct 1998
| Oct 1998
UT| 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
---+-----------------------------------------------------------
0| 3 9 7 10 8 7 9 3 20. 9 9 4 7 10 3
1| 5 8 7 12 7 12 3 4 14 10 10 14 11 12 17
2| 2 6 8 6 6 16 9 10 16 13 10 12 7 17 13
3| 3 10 11 5 8 16 11 3 7 9 13 9 7 11 8
4| 3 8 9 15 10 9 3 6 11 5 10 12 10 10 6
5| 1 11 7 11 17 13 7 10 16 13 16 15 9 10 12
6| 6 8 9 12 6 17 14 8 9 13 9 6 11 11 7
7| 9 9 6 7 15 20 6 1 20 14 8 8 10 3 7
8| 5 7 10 19 10 12 9 8 10 8 8 7 2 6
9| 4 7 3 7 11 10 4 9 10 13 6 8 1 4
10| 3 7 6 5 5 6 5 7. 5 5 4. 7 3 2.
11| 4 4 7 3 0. 4 4 5 7. 14 0. 6 2 7
12| 0 6 5 4 5. 2 7 5 6 6 7 4
13| 0 4 4 1 4 4 0 4 0. 1 5. 4. 2.
14| 1 0. 1 0 1 4 1 2 3 2. 2 2
15| 1 1 3 3 0 2 3 8 3 2.
16| 1 1 2 3 3 2 4 3 2 3 4.
17| 1 0 1 1 0 0 0. 2 4 0 0 1 3
18| 0 3 4 3 2 0 2 6 1 1 1 8. 2 2
19| 1 6 1 3 3 3 5 4 4 3 1 1 3 6
20| 3 4 4 3 1 4 3 3 6 1 1 5 8 4 5
21| 4 3 4 2 3 4 4 4 9 4 11 6 5 8 5
22| 4 2 1 3 4 4 5 9 9 6 4 7 6 11 3
23| 7 2 2 8 12 4 4 8 15 10 6 7 9 10 8
---+-----------------------------------------------------------
UT| 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
| Oct 1998
Counts of reflections longer than 3.5 seconds
during the Draconids outbursts
| Oct 1998
UT| 7 8 9
---+------------
0| 13 11 13
1| 18 17 9
2| 15 17 17
3| 13 20 24
4| 18 16 9
5| 13 16 7
6| 13 19 17
7| 18 24 15
8| 19 27 27
9| 14 20 14
10| 13 19 16
11| 6 45 14 <----
12| 8 73 11. <----
13| 16 107 <----
14| 9 14
15| 7 12
16| 4 10
17| 6 3
18| 2 5
19| 6 8
20| 7. 13
21| 10 17
22| 7 10
23| 8 4
---+------------
UT| 7 8 9
| Oct 1998
The Draconids outburst looks much better in the duration distribution.
Duration distribution for October 8, 1998,
(counts are extrapolated for the full hour)
|0.5 s count (underdense)
| |1.0-1.5 s count
| | |2.0-3.0 s
| | | |3.5-6 s
| | | | |6.5-12.5 s
Begin | | | | | |13-25.5 s
of hour | | | | | | |26-49.5 s
| | | | | | | | | >=50 s
| | | | | | | | | |fraction of time observed
| | | | | | | | | | (1.00 = full hour)
v v v v v v v v v v
0:00, 268,117, 39, 10, 0, 1, 0, 0,1.00
1:00, 282,134, 45, 13, 2, 1, 0, 0,0.89
2:00, 272,145, 36, 11, 4, 1, 1, 0,0.95
3:00, 269,121, 40, 20, 0, 0, 0, 0,0.89
4:00, 242,123, 30, 12, 3, 0, 1, 0,1.00
5:00, 220,108, 34, 12, 3, 1, 0, 0,0.95
6:00, 220,105, 34, 13, 4, 2, 0, 0,1.00
7:00, 196,101, 24, 12,10, 2, 0, 0,1.00
8:00, 203,108, 22, 19, 4, 3, 0, 0,0.89
9:00, 217, 72, 32, 13, 6, 1, 0, 0,0.84
10:00, 155, 99, 27, 12, 3, 1, 2, 0,0.89
11:00, 148, 82, 38, 27,16, 1, 0, 1,0.89 <---
12:00, 170,133, 80, 48,23, 2, 0, 0,1.00 <---
13:00, 160,129, 72, 67,36, 4, 0, 0,1.00 <---
14:00, 122, 79, 36, 11, 1, 1, 0, 1,0.84
15:00, 97, 42, 14, 7, 3, 0, 1, 0,0.95
16:00, 79, 38, 14, 9, 1, 0, 0, 0,1.00
17:00, 71, 48, 11, 1, 0, 1, 0, 1,0.95
18:00, 106, 58, 14, 4, 1, 0, 0, 0,0.95
19:00, 132, 94, 16, 6, 2, 0, 0, 0,0.95
20:00, 138,111, 25, 11, 1, 1, 0, 0,0.84
21:00, 200,103, 28, 10, 6, 0, 1, 0,1.00
22:00, 220, 86, 29, 7, 2, 0, 0, 0,0.95
23:00, 224, 96, 22, 4, 0, 0, 0, 0,0.95
The Draconids outburst peak occured here at 12:50 to 13:20 UT, and there
was good activity from 11:50 to 13:50 UT.
Propagation overview for October 1998
E : sporadic-E or E-layer propagation
F : FAI (field aligned irregularity)
- : propagation only via meteor echos.
(blank) : no data available
| Oct 1998
UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
---+--------------------------------------------------------------
0| - - - - - - - - - - - - - - - - - - - - - - - F - - - - - -
1| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3| - - - - - - - - - F - - - - - - - - - - - - - - - - - - - - -
4| - - - - - - - - - E - - - - - - - - - - - - - - - - - - - - -
5| - - - - - - - - - E - - - - - - - - - E - - - - - - - - - - -
6| - - - - - - - - - F - - - - - - - - - - - - - - - - - - E - -
7| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
8| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
10| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
11| - - - E - - - - - - - - - - - - - - - - - - - - - - - -
12| - - - - - - - - - - - - - - - - - F - - E - - - - - - -
13| - - - - - - - - - - - - - - - - - F - - - - - - - - - -
14| - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
15| - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
16| - - - - - - - - - E - - - - - - - - - - - - - - F - -
17| - - - - - - - - - E - - - - - E - - - - - - - - - F - -
18| - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19| E - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
20| E - - - - - - - - - F - - - - - - - - - - F - - - - - - - - -
21| - - - - - - - - - F - - - - - - - - - - - - - - - - - - - -
22| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
23| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
---+--------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
| Oct 1998
Notes:
. looking at the whole month of October 1998, the Draconids outburst is
the biggest event. The Orionids showed a broad peak of activity lasting
for several days with no special peak observed, as in previous years.
Werfried Kuneth
---------------------------------------------------------------------------
Observer: Ton Schoenmaker
Location: Roden, Netherlands (06 26' E, 53 08' N)
Frequency: 77.257 MHz
Transmitter: Kielce, Poland; 100 kW, horizontal polarization
Antenna: 4-element horizontal Yagi, geographical azimuth 105 degrees (ESE),
elevation 15 degrees
Receiver: home-made convertor followed by Barlow-Wadley XCR-30 Mark II;
total sensitivity 0.3 uV for 20 dB S/N, bandwidth 3 kHz
Observing: rectified signal from 455 Khz I.F. recorded with a Servogor
strip-chart recorder with a chart speed of 120 mm/hour
Observations of the Draconids started at 12h19m UTC when the TV transmitter
in Kielce was switched on. Immediately many reflections were recorded. At
the 0.12 uV level signals were nearly overlapping, signals of 0.3 uV or
stronger could be separated most of the time. In contrast with the outbursts
of Leonids 1997 and so-called new peak of the Perseids, not many long-lasting
echoes were present. The longest reflections lasted about 1 minute. The
recordings show that the peak of stronger signals preceded the peak of
weaker signals by about 15 - 30 minutes.
The following table gives the uncorrected counts of signals stronger than
0.3 uV (column "A") and counts of signals stronger than least 0.12 uV
(column "B"), converted into hourly rates.
Observations of 10 October are presumed to be sporadics mainly.
Hourly rates for the indicated intervals:
| October 1998
| 8 10
UT | A B A B
--------------+--------------------------
12h19 - 12h30 | 131 272 15 62
12h30 - 12h45 | 132 332 15 62
12h45 - 13h00 | 84 348 15 62
13h00 - 13h15 | 92 360 * 12 71
13h15 - 13h30 | 48 332 12 71
13h30 - 13h45 | 48 276 12 71
13h45 - 14h00 | 72 280 12 71
--------------+--------------------------
14h00 - 14h30 | 30 164 15 77
14h30 - 15h00 | 30 118 15 77
--------------+--------------------------
15h00 - 16h00 | 35 122 8 64
16h00 - 17h00 | 21 88 18 59
17h00 - 18h00 | 25 107 11 58
18h00 - 19h00 | 28 89 16 67
19h00 - 20h00 | 19 84 14 67
20h00 - 21h00 | 23 71 21 66
* saturation level
Ton Schoenmaker
---------------------------------------------------------------------------
Observer: Chikara Shimoda
Location: Asahi, Nagano, Japan (137 51' E, 36 07' N)
Frequency: 81.4 MHz
Transmitter Location: FM-Japan 81.3 MHz, 10 kW, distance 180 km.
Antenna: 5 element Yagi directed to the zenith.
Receiver: AM-FM Tuner (TRIO KT-1100)
Observing method: Meteor echoes output from center-tuning meter were
recorded on a pen-recorder chart.
Oct | UT
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
------+-------------------------------------------------+-----------
1 | 19 22 20 23 18 22 23 26 24 | 20.3 22.7
2 | 14 15 10 19 12 16 12 14 22 25 29 28 | 14.3 21.7
3 | 13 15 15 13 10 14 17 10 20 15 13 15 | 13.3 15.0
4 | 9 10 12 9 9 15 17 17 15 15 28 15 | 10.7 17.8
5 | 10 13 14 15 9 10 15 21 22 15 18 16 | 11.8 17.8
6 | 13 16 14 20 9 12 13 17 9 13 17 23 | 14.0 15.3
7 | 18 14 14 8 12 10 15 20 8 24 12 19 | 12.7 16.3
8 | 17 33 43 25 15 15 23 22 19 16 26 17 | 24.7 20.5
9 | 11 12 15 9 10 19 16 12 16 14 18 17 | 12.7 15.5
10 | 12 21 19 19 12 18 20 19 21 25 18 16 | 16.8 19.8
11 | 14 8 7 14 12 12 15 13 9 13 12 | 11.0 12.3
12 | 9 10 10 11 7 15 9 18 10 13 17 10 | 10.3 12.8
13 | 12 11 22 20 20 16 26 24 28 27 18 30 | 16.8 25.5
14 | 17 19 12 18 11 16 16 14 18 15 18 21 | 15.5 17.0
15 | 11 18 14 13 13 10 18 20 19 17 17 27 | 13.2 19.7
16 | 17 22 15 17 16 16 20 17 22 18 19 20 | 17.2 19.3
17 | 17 7 17 21 12 22 16 19 21 17 | 15.5 17.8
18 | 11 14 18 14 12 22 18 17 14 14 | 15.2 15.8
19 |
20 | 9 16 13 13 17 16 25 15 22 11 12 12 | 14.0 16.2
21 | 14 8 14 18 16 24 36 20 19 21 30 31 | 15.7 26.2
22 | 11 15 15 19 25 21 28 23 19 21 19 24 | 17.7 22.3
23 | 11 12 13 17 25 29 34 23 28 34 32 28 | 17.8 29.8
24 | 17 21 26 20 25 28 28 31 26 34 29 29 | 22.8 29.5
25 | 19 28 15 28 24 27 33 27 29 32 30 35 | 23.5 31.0
26 | 17 20 28 21 19 22 36 29 33 23 23 22 | 21.2 27.7
27 | 17 27 26 19 12 25 28 30 28 28 33 25 | 21.0 28.7
28 | 16 21 18 22 16 20 25 16 23 23 22 12 | 18.8 20.2
29 | 23 25 24 16 25 20 | 22.2
30 | 18 23 27 25 28 32 31 21 39 21 25 | 24.2 28.2
31 | 16 22 20 13 15 19 20 21 22 23 24 31 | 17.5 23.5
------+-------------------------------------------------+-----------
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
Oct | UT
Notes:
* (1) average hourly rate between 11h-17h UT
**(2) average hourly rate between 17h-23h UT
. local time = JST = UT + 9 hours
. I caught the Giacobinids activity, see:
http://www2s.biglobe.ne.jp/~JN-/Gia98.GIF
Chikara Shimoda
---------------------------------------------------------------------------
Observer: Ilkka Yrjola
Location: Finland (26 35' E, 60 54' N)
Frequency: 88.8 MHz ?
Receiver: Salora SRP-22 modified, narrow band FM (B=15 kHz)?
detected signal level >-122 dBm.
FM detection, no pulse noise rejection required.
Antenna: 2-el. Yagi, G=4 dBd to SW, azimuth 45 deg (SW), polarisation H.
Data sampling system: threshold triggering, sampling rate 32 ms.
Computer logs total hourly elapsed reflection time, number of
triggers for the hour, the longest time the signal was
continuously above detection level for the hour.
Data on major showers available in the Compact MS-Soft format.
Software for viewing available from
www.saunalahti.fi/~oh5iy/radio50.zip (754 K).
The Orionids 1998 observations are made with a temporary setup and the number
of reflections is unfortunately not directly comparable with older data.
Orionids 1998
Meteor counts in one hour intervals starting at:
UT | 18 Oct 19 Oct 20 Oct 21 Oct
----+---------------------------------
0 | 458 422 440 935
1 | 405 496 493 356
2 | 545 364 671 673
3 | 435 477 586 559
4 | 310 548 490
5 | 664 456 665 972
6 | 537 790 602
7 | 752 545 674 492
8 | 429 407 1207 487
9 | 427 446 362 360
10 | 449 348 450 406
11 | 506 458 431
12 | 559 740 342
13 | 284 254 241
14 | 341 275 273
15 | 447 233 227
16 | 262 317 240
17 | 259 270 263 256
18 | 278 298 305 219
19 | 296 303 456 388
20 | 403 452 486 407
21 | 422 584 480 528
22 | 518 477 533 678
23 | 662 376 425 657
----+---------------------------------
UT | 18 Oct 19 Oct 20 Oct 21 Oct
Notes:
. Aurora on October 19
Ilkka Yrjola
---------------------------------------------------------------------------
Observer : W.T. Zanstra
Location : Appingedam, Netherlands (6 51' E, 53 19' N)
Frequency: 72.110 MHz
Transmitter Location:
Wroclaw (16 43' E, 50 52' N), Poland, 135 kW, distance 735 km
Antenna : Yagi, 5 elements, geographical azimuth 110 deg (ESE),
elevation 12 deg
Receiver : Bearcat UBC 177XLT Scanning Radio, sensitivity 0.3 uV
Observing method: listening
Forward scatter observations of Draconids
October 8, 1998
UT | n spor Fobs
-------------+--------------------
07:00-07:30 | 28 38 0.64
07:30-08:00 | 29 37 0.70
08:00-08:30 | 26 36 0.75
08:30-09:00 | 19 35 0.81
09:00-09:30 | 41 33 0.85
09:30-10:00 | 41 32 0.88
10:00-10:30 | 22 31 0.91
10:30-11:00 | 36 29 0.91
11:00-11:30 | 43 28 0.85
11:30-12:00 | 46 26 0.74
12:00-12:30 | 48 25 0.53
12:30-13:00 | 64 23 0.31
13:00-13:30 | 122 22 0.00
13:30-14:00 | 38 20 0.00
14:00-14:30 | 53 19 0.00
14:30-15:00 | 36 18 0.00
15:00-15:30 | 19 18 0.00
15:30-16:00 | 10 17 0.00
16:00-16:30 | 15 17 0.00
16:30-17:00 | 17 17 0.00
17:00-17:30 | 10 18 0.00
17:30-18:00 | 2 18 0.00
18:00-18:30 | 14 18 0.00
18:30-19:00 | 12 19 0.00
19:00-19:30 | 29 21 0.00
19:30-20:00 | 10 22 0.00
20:00-20:30 | 26 24 0.00
20:30-21:00 | 24 26 0.00
21:00-21:30 | 26 27 0.32
21:30-22:00 | 29 28 0.52
22:00-22:30 | 22 31 0.59
22:30-23:00 | 19 32 0.62
23:00-23:30 | 12 34 0.63
23:30-24:00 | 36 36 0.61
-------------+--------------------
UT | n spor Fobs
UT | n
-------------+------
12:30-12:35 | 84
12:35-12:40 | 60
12:40-12:45 | 72
12:45-12:50 | 36
12:50-12:55 | 72
12:55-13:00 | - no observation
13:00-13:05 | 168
13:05-13:10 | 144
13:10-13:15 | 60
13:15-13,20 | 132
13:20-13:25 | 120
13:25-13:30 | 96
13:30-13:35 | 60
13:35-13:40 | 48
Notes:
. the numbers (n) are hourly rates, but calculated per half hour. They are
corrected for dead time and breaks.
. The sporadics (spor) are based on observations in the past during several
years. Fobs is the Hines' observability function, as described in Canadian
Journal of Physics (Vol.33, September 1955, number 9, pag 493-503).
This probability function is not always sufficient when the radiant is close
to the zenith, as is also the case now with the Draconids 1998. Peter Bus,
Ton Schoenmaker and myself are working on an alternative.
Wim Zanstra
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 it has gradually been expanded. In regularly publishing
summaries of observations, potential radio observers are kept up to date of
existing installations, possibilities and limitations of radio meteor
observations. In the long run, there should be sufficient observing stations
to cover the whole globe, allowing to detect stream outbursts which may
remain unnoticed visually.
RMOB contains typically: summaries of recent observations, equipment data,
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 un-subscribe) 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. ANNOUNCEMENT
Pierre Terrier <pierre.terrier@wanadoo.fr> is the author of Meteor 2.0,
a PC program designed for automatic meteor reflections registration.
It uses a special small interface card, which can be used on machines
as small as a 286 (no sound card required). The circuit causes very
little interference on the RF part. The program and its documentation,
as well the circuit description can be found at:
http://members.tripod.com/~astro_electronic/
(in French and in English)
4. CONTRIBUTORS / USEFUL ADDRESSES
Enric Fraile Algeciras (EA3BTZ)
Frederic Corominas 58, Torrelles de llobregat, E-08629 Barcelona
E-mail: EA3BTZ@mx3.redestb.es
http://www.redestb.es/personal/ea3btz (in Spanish)
Michael Boschat
6306 Cork St., Apt.512, Halifax, Nova Scotia, Canada
E-mail: andromed@atm.daldot ca
Giorgio Bressan, Associazione Friulana di Astronomia e Meteorologia
E-mail: gbressan@lycosmail.com
Eisse Pieter Bus
Groningen, Netherlands
E-mail: epbus@wxsdot nl
Maurice De Meyere
Hullekensstraat 24, B-9831 Deurle, Belgium
tel: +32 (9) 282 35 26
Call: ON4NU, packet: on4nu@on1ced
E-mail: via Chris Steyaert
University of Ghent, Astronomical Observatory
Krijgslaan 281(S9), B-9000 Gent, Belgium
E-mail contact: Paul.Vauterin@omadot be, Pierredot deGroote@rug.acdot be
H. W. Kelsey, A.L.P.O.
Santa Maria, CA, USA
E-mail: 73073.1464@compuserve.com
Werfried Kuneth
Ferndorf, Austria
E-mail: kuneth@netway.at
Alastair McBeath
IMO: International Meteor Organization
12A Prior's Walk, Morpeth, Northumberland, NE61 2RF, England, U.K.
E-mail: via Chris Steyaert
Ton Schoenmaker, DMS
Meester Homastraat 8, NL 9301 HP Roden, Netherlands
E-mail: schoenmaker@nfradot nl
Chikara Shimoda
178, Hario, Asahi-mura, Higashitikuma-gun Nagano, Japan
Fax: +81-263-99-3532
E-mail: c-shimo@mtd.biglobe.ne.jp
JN Homepage http://www2s.biglobe.ne.jp/~JN-/index.html
Chris Steyaert, VVS
Kruisven 66, B-2400 Mol, Belgium
tel: +32 (14) 31 51 04
E-mail: steyaert@vvs.innetdot be
Compuserve: 72650,3513
Jeroen Van Wassenhove, VVS
's Gravenstraat 66, B-9810 Nazareth, Belgium
tel: +32 (9) 385 61 09
E-mail: 100101.734@compuserve.com
Ilkka Yrjola
Jukolantie 16, FIN-45740 Kuusankoski, Finland
E-mail home: oh5iy@sci.fi
http://www.sci.fi/~oh5iy/
Call: OH5IY, packet radio: OH5IY@OH5RBG.#KVL.FIN.EU
W.T. Zanstra
Spijkerlaan 13, 9903 BB Appingedam, Netherlands
tel: +31 (0)596 625617
E-mail: wimzanstra@freemaildot nl
--
Christian Steyaert (RMOB9810) 8 November 1998
--
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