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(meteorobs) Radio Meteor Obs. Bull. Sept 1999 Sextantids?
Radio Meteor Observation Bulletin No. 74 October 1999
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.
1999
UT | 27 Sep 28 Sep 29 Sep 30 Sep
----+----------------------------------
0h | 20 15 57
1 | 18 15 10
2 | 22 35
3 | 15 21
4 | 25 13
5 | 24 41
6 | 34 44
7 | 59 31
8 | 24 19
9 | 19 51
10 | 36 35
11 | 31 21
12 | 62
13 | 54
14 | 26 3
15 | 21 3
16 | 7 12 35
17 | 30 42 21
18 | 8 54 33
19 | 17 18 31
20 | 38 37
21 | 39 40
22 | 26 34
23 | 27
----+----------------------------------
UT | 27 Sep 28 Sep 29 Sep 30 Sep
1999
Note:
. apparently, the data capture software doesn't work well. Therefore please
use the above counts with reservations.
I'm testing the MCT5X and Meteor 2.0 software to supply my actual software
for the future.
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
September 1999
Number of meteors heard in one hour interval
| UT
Sep | 09h 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00
----+---------------------------------------------------------------
12 | - - - - - 2 18 9 4 - - - - - - -
Notes:
. no corrections for radiant position made to the counts.
. ( - ) means no observations made.
. * = Interference.
. virtually no reflections heard, probably because of an offset of the
filter or other hardware problems.
Mike Boschat
---------------------------------------------------------------------------
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 (x form), 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].
September 1999
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Sep | UT
1999 | 20h 21 22 23 00 01 02 03 04 05 06
------+-------------------------------------------------------
1- 2 | 66 60 52 71 79 62 97 115 130 170 ?
2- 3 | 43 91? 32 ? 73 86 65 91 146 161 106
3- 4 | 39 49 49 104 45 67 ? ? 158 ? ?
4- 5 | 56 60 56 63 49 53 58 101 103 ? ?
5- 6 |
6- 7 | ? 92 ? 97 23 7 12 16 44 50 ?
7- 8 | 56 67 100? 104? 88 94 121 165 161 ? ?
8- 9 | 78 ? 84 93 94 94 129 137 156 ? 143
9-10 | 74 ? 95 99 106? 91 149 163 148 ? ?
10-11 | ? ? ? ? 80 ? 118 163 ? ? ?
11-12 | 80? 101? 78 ? 73 84 106 177 144 ? ?
12-13 | ? ? ? ? 99? 104 134 ? ? ? ?
13-14 | 72 ? 91 94 99? 101 136 173 ? ? 103
14-15 | ? ? ? ? ? ? 156? 155 ? 188?
15-16 | 34 ? ? ? 92 76 156? 138 125 216? 137
16-17 | 50 ? 80 93 71 80 ? 169 152 218? 155
17-18 | 45 64 77 76 ? 90 130 158 134 ? ?
18-19 | 46 59 84 75 92 ? ? 168 158 200 130
19-20 | 60 98 82 90 99 110 148 179 183 172 145
20-21 | 35 83 96 73 92 109 147 156 139 172 159
21-22 | 50 ? 78 82 77 104 109 149 156 194 144
22-23 | 35 83 92? 87 89 87 150 173 134 184 ?
23-24 |
24-25 |
25-26 | 27 71 92 98 60 89 139 142 177 197 168
26-27 | 36 69 65 83 78 105 124 134 124 158 126
27-28 | 25 60 70 81 87 71 152 135 138 168 111
28-29 | 34 52 76 84 88 76 142 126 160 120
29-30 | 39 45 60 85 84 98 128 161 166 229 117
30- 1 | 21 55 86 83 94 116 124 138 150 168 98
------+-------------------------------------------------------
1999 | 20h 21 22 23 00 01 02 03 04 05 06
Sep | UT
Raw counts of reflections with a duration of at least 1.000 s
during one hour interval starting at UT:
Sep | UT
1999 | 20h 21 22 23 00 01 02 03 04 05 06
------+--------------------------------------------------------
1- 2 | 11 1 8 10 18* 2 20* 18 14 54? ?
2- 3 | 3 14 6 ? 11 15 7 9 18 30 13
3- 4 | 1 11* 15* ? 7 8 23 33 19 ? ?
4- 5 | 6 5 11 3 7 5 5 12 14 ? ?
5- 6 |
6- 7 | ? ? ? ? 2 3* 2 3* 3 12* ?
7- 8 | 6 9 ? ? 12 19* 14 11 31* ?
8- 9 | ? ? 18* ? 9 12 12 14 33* ? ?
9-10 | 9 ? 15 ? 16 10 19 20 ? ? ?
10-11 | ? ? ? ? 4 8 7 13 19 ? ?
11-12 | 4 10 8 ? 2 5 9 22 12 ? ?
12-13 | ? ? ? ? 15 12 19 15 ? ? ?
13-14 | 9 ? 19? 10 10 10 11 19 ? 54* 20
14-15 | ? 12 ? ? 21 12 12 22 34 40*
15-16 | 4 ? 14 ? 15 10 10 17 12 68? 39?
16-17 | 6 ? 10 20* 9 7 21 22 13 49* 44*
17-18 | 7 8 12 7 16 6 17 20 10 54* 46*
18-19 | 8 5 5 9 12 15 22 17 27 41* 14
19-20 | 9 7 11 7 5 9 13 22 27 22 13
20-21 | 2 7 11 6 12 11 17 18 17 30 26
21-22 | 8 11 11 6 10 11 14 8 27 28 35*
22-23 | 2 8 3 4 11 10 26 23 13 45? ?
23-24 |
24-25 |
25-26 | 2 4 10 12 2 3 14 11 23 30 31
26-27 | 3 6 3 11 9 11 15 11 14 18 15
27-28 | 4 5 8 8 8 3 34* 18 12 20 12
28-29 | 6 6 5 4 9 8 24 18 11 21
29-30 | 5 2 6 11 2 5 17 26 23 46* 18
30- 1 | 5* 7 6 6 10 17 13 10 15 21 17
------+--------------------------------------------------------
1999 | 20h 21 22 23 00 01 02 03 04 05 06
Sep | UT
Notes:
. ? probably affected by sporadic-E, tropo, direct reception.
. * warning for relative high number of long duration reflections,
an indication for potential stream activity.
. local time = UT + 2 hours
. thunderstorms on Sep 23-25
Maurice De Meyere
----------------------------------------------------------------------
Location: Astronomical Observatory, University of Ghent, Belgium
(ED50 coordinates: 3 42' 32" E, 51 01' 25" N)
Antenna (2x): 4 elements horizontal Yagi, pointed East, elevation= 20 deg
Antenna amplifier: 10 dB gain
narrow band resonance lambda/4 antenna filter
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.
-------------------------------------------------------------
| Sep 1999 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 70 68 58 57 53 52 62 53 40 64 58 45 58 44 38
1 | 75 51 60 68 77 51 73 64 75 114 52 59 43 44 52
2 | 84 65 73 82 77 59 46 78 59 76 55 58 63 63 69
3 | 96 81 84 99 67 110 85 78 83 128? 70 80 83 59 60
4 | 107 84 72 81 70 52 110 86 71 60 80 74 56 62 90
5 | 99 117 58 58 58 49 96 105 100 91 63 106 81 71 67
6 | 75 86 71 114 96 52 62 84 65 112 52 76 71 53 65
7 | 59 95 69 81 34 59 77 54 88 67 68 84 57 44
8 | 56 49 59 51 60 33 70 62 94 38 46 66 78 56 51
9 | 58 51 73 42 50 59 53 38 90 31 40 60 78 25 39
10 | 60 36 69 86 70 49 80 76 25 86 52 43 48 39
11 | 56 45 44 57 45 55 47 35 38 55 31 53 18 35
12 | 25 21 27 52 43 38 36 27 35 32 35 20 25 26 27
13 | 31 23 21 33 26 21 18 21 29 23 30 32 35 28 30
14 | 33 12 28 23 38 37 14 24 20 25 18 24 34 38 27
15 | 30 20 20 30 18 26 21 28 25 15 13 29 25 14 14
16 | 21 21 26 26 18 18 53 36 34 18 16 26 15 13
17 | 20 18 23 21 17 21 18 22 15 22 22 18 18 14
18 | 41 30 18 20 27 38 18 21 10 22 18 28 15 20
19 | 38 33 41 42 34 33 28 30 33 25 55 28 35 20 25
20 | 39 25 38 36 26 43 34 30 34 26 34 22 34 36 23
21 | 29 35 30 32 40 34 39 38 32 29 41 31 44 48 29
22 | 41 25 26 30 37 32 33 35 41 32 26 37 45 21 31
23 | 49 25 35 56 35 50 29 45 38 42 35 43 41 38 24
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-------------------------------------------------------------
| Sep 1999 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+------------------------------------------------------------
0 | 34 45 45 42 30 41 34 37 49 54 50 55 45 43 44
1 | 40 53 52 48 30 38 37 37 58 65 51 62 49 47 59
2 | 30 84 53 56 37 41 31 30 66 73 60 70 72 83 55
3 | 34 42 47 78 38 42 46 97 110 73 103 85 68 89 110
4 | 48 53 57 68 94 70 52 43 81 97 106 79 69 74 86
5 | 48 103 63 59 65 84 77 83 116 149 142 99 109 108 150
6 | 64 83 107 96 49 60 95 48 76 106 103 88 86 123 104
7 | 29 100 63 71 53 59 71 48 103 115 74 106 77 67
8 | 41 49 53 67 41 69 89 45 48 102 71 92 103 80
9 | 42 77 65 60 36 50 63 45 69 104 58 83 75 97
10 | 39 42 70 51 38 43 69 60 92 84 55 77 96 76
11 | 37 35 88 32 27 27 78 36 36 84 91 51 69 60 64
12 | 31 35 29 36 21 51 43 22 20 53 50 37 70 53 78
13 | 19 40 31 26 13 22 6 12 31 40 22 23 25 26 22
14 | 66 17 18 25 12 25 13 9 16 40 22 21 24 31 41
15 | 13 17 17 19 21 21 18 22 14 32 15 12 30 15 18
16 | 16 16 18 33 18 37 30 20 23 26 19 15 23 34 25
17 | 11 19 22 18 27 24 22 16 19 28 21 17 24 26 18
18 | 20 16 12 16 39 12 29 19 23 27 23 23 27 18 20
19 | 22 25 26 26 31 21 27 21 26 28 30 42 37 33 39
20 | 40 42 39 25 28 34 18 34 36 43 34 40 38 41 35
21 | 38 33 29 29 21 34 20 43 46 40 45 38 49 55 33
22 | 51 30 22 17 28 23 17 35 40 40 32 39 34 35 39
23 | 35 27 31 26 31 27 20 35 37 42 42 46 46 34 50
---+------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Notes:
. rather quiet month regarding sporadic E
. a distinct increase towards the end of the month during the
morning hours, probably due to the Sextantids (radiant: R.A. =
152 deg, Decl. = 0 deg, rises at 5h UT, sets 15h30 UT)
Pierre De Groote
---------------------------------------------------------------------------
Observer: Werfried Kuneth
Location: Ferndorf, Austria (13 37' E, 46 45' N)
Antenna: 2 element Yagi, direction southeast, no elevation at 1 m 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, another channel is used for automatic
interference rejection. Sampling interval: one 4096
point FFT every 0.5 seconds.
The monthly results showing the total reflective time are now also
available at http://www.qsldot net/oe8fnk this includes now also Es, FAI
and fireball statistics.
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.
| Sep 1999
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+-----------------------------------------------------------
0| 3 1 1 0 6 3 5 5 3 1 0
1| 5 4 1 2 3 4. 8 4 8 3 5
2| 2 5 5 5 4 3 3 1 3 3 8
3| 4 8 4 5 4 3 0 3 1 2 3
4| 4 10 6 5 0 3 3 7 1 2 1
5| 4 4 5 4 3 3 1 5 4 5 5
6| 3 2 6 4 10 2 2 1 1 4 6
7| 4 7 3 6 5 3 3 0 2 2 4 4
8| 4 2 3 1 3 4 3 2 5 1 8 4
9| 2 2 4 0 1 2 7 6 3 2 4 4
10| 3 1 2 2 3 2 3 2 3 4 2 6
11| 1 0 1 5 3 2. 2 5 4 3 2 1
12| 2 1 1 2 4 2. 7 2 5 2 3 3
13| 2 3 1 3 1 3 0 4 0 3 4 5
14| 3 2 0 4. 3 0 2 2 1 3 0 4
15| 0 0 1 2 0 1 1 2 2 1 1 1
16| 0 0 0 0 2 1 1 0 0 1 2 2
17| 0 0 0 2 1 2 1 1 0 0 1 0
18| 0 6 1 2 3 8 0 1 0 0 0 0
19| 0 2. 0 0 1 6 1 6 1 2 0 1
20| 2 3. 0 0 2 9 2 1 1 2 2 0 1
21| 2 1 3 0 1 6 0 2 0 2 0 1
22| 1 1 1 1 1 3 0 0 5 1 2 2
23| 2 1 2 5 1 3 1 1 1 1 2 0 1
---+-----------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Sep 1999
| Sep 1999
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+-----------------------------------------------------------
0| 4 0 0 0 1 0 2 1 2 0 0 1 0 7
1| 1 1 3 4 0 0 2 0 3 1 2 2 5
2| 3 2 1 1 4 4 4 4 1 2 1 3 8
3| 5. 2 4 3 2 2 1 4 1 2 3 3 2 6 4
4| 3 2 5 3 3 5 1 5 0 5 2 3 5. 2 1
5| 1 2 2 7 3 6 3 5 7 1 8 3. 2 6 2
6| 1 3 3 6 2 2 5 3 4 7 5 3. 8 11 6
7| 5 4 3 4 2 4 3 3 4 3 5 3 8 5 18
8| 2 1 0. 3 4 3 3 1 2 11 3 7 4 7 20
9| 1 4 2 1 2 2 0 4 3 4 4 10 8 20
10| 5 0 5 1 0 3 7 0 3 2 3 4 6 9 20
11| 3 13 1 3 3 2 3 2 5 8 8 3 6 10 9
12| 7 6 2 4 2 3 6 2 4 1 2 0 7 9 7
13| 2 4 1 0 3 0 1 1 5 1 4 2. 4 0 6
14| 1 0 2 0 0 0 0 1 1 4 1 1 2 2 1
15| 0 1 3. 1 1 1 1 2 0 1 2 1 4 0
16| 0 0 0 0 0 0 0 0 1 0 0 0 0 2
17| 0 2 1 0 0 0 0 0 1 1 0 0 0 0 0
18| 1 0 2 0 1 1 2. 0 3 1 0 2 0 2
19| 0 0 1 0 0 1 2 2 0 0 0 1 1 3 0
20| 1 3. 1 2 0 1 0 1 1 4 2 1 4 0 2
21| 4 3 1 3 0 0 2 3 1 1 1 4 5 3 0
22| 0 1 1 3 0 5 0 0 1 0 0 2 1 2
23| 1 0 0 0 1 0 1 1 1 1 1 1 1 4
---+-----------------------------------------------------------
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
| Sep 1999
Propagation overview for September 1999
E : sporadic-E or E-layer propagation
F : FAI (field aligned irregularity)
- : propagation only via meteor echoes.
(blank) : no data available
| Sep 1999
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
---+------------------------------------------------------------
0| - - - - - - - - - - - - - - - - - - - - - - - - - - -
1| - - - - - - - - - - - - - - - - - - - - - - - - - - -
2| - - - - - - - - - - - - - - - - - - - - - - - - - -
3| - - - - - - - - - - - - - - - - - - - - - - - - - -
4| - - - - - E - - - - - - - - - - - - - - - - - F - -
5| - - - - - - - E - - - F - - - - - - - - - - - - F - -
6| - - - - - - - - - - - - - - - - - - - - - - - - - - -
7| - - - - - - - - - - - - - - - - - - - - - - - - - - -
8| - - - - - - - - - - E - - - - - - - - - - - - - - - -
9| - E - - - - - - - - - - - - - - - - - - - - - - - - -
10| - E - - - - - - - - - - - - - - - - - - - - - - - - -
11| - - E - - - - - - - - - - - - - - - - - - - - - - - -
12| - - E - - - - - - - - - - - - - - - - - - - - - - - -
13| - - - - - - - - - - - - - - - - - - - - - - - - - - -
14| - - - - - - - - - - - - - - - - - - - - - - - - - - -
15| - - - - - - - - - - - - - - - - - - - - - - - - - -
16| - - - - - - - - - - - - - - - - - - - - - - - - - - -
17| - - - - - - - - - - - - - - - - - - - - - - - F - - -
18| - E - - - - - - - - - - - - - - - - F - - - - F - - -
19| - F - - - - - - - - - - - F - - - - F - - - - F - - -
20| - E - - - - - - - - - - - - F - - - - - - - - - - - - -
21| - - - - - - - - - - - - - - - - - - - - - - - - - - - -
22| - - - - - - - - - - - - - - - - - - - - - - - - - - -
23| - - - - - - - - - - - - - - - - - - - - - - - - - - -
---+------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
| Sep 1999
Note:
. good activity on September 28-30, seems to be from the Sextantids.
Werfried Kuneth
---------------------------------------------------------------------------
Observer: R.B. Minton
Location: Raton, NM (104 26' W, 36 54' N, 2000 m above sea level)
Frequency: 92.9 MHz
Transmitters: KTZA FM 100 kW, Artesia NM, dist 444 km, geogr azim 178 deg
KSPZ FM 53 kW, Color. Springs, dist 217 km, geogr azim 352 deg
KYBR FM ? kW, Espanola NM, dist 180 km, geogr azim 236 deg
???? FM ? kW, Juarez Mexico, dist 579 km, geogr azim 198 deg
KWFM FM 90 kW, Tucson AZ, dist 798 km, geogr azim 233 deg
Antenna: folded dipole, on 6.3 m high mast, oriented N-S
Receiver: Subaru 12 V DC car radio with digital tuning
Observing method: conditioned audio input in the game port of an IBM 386 SX-50
PC, 128 samples/second, DOS/Basic software, automatic
Total hourly counts
August 1999
Aug| UT
1999| 0h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
----+------------------------------------------------------------------------
1 | 19 16 11 15 7 9 15 17 9 8 16 14 9 12 11 27 22 10 11 15 14 22 10 15
2 | 13 10 9 9 16 14 16 14 11 17 21 15 17 9 11 30 12 18 8 12 8 18 13 9
3 | 25 23 15 9 6 14 24 17 6 7 5 8 7 5 15 30 29 27 19 10 20 23 13 23
4 | 17 29 3 9 13 11 10 9 8 6 17 12 14 8 21 37 28 27 5 14 11 23 24 12
5 | 8 12 4 17 9 10 7 10 8 14 5 11 7 4 16 22 24 26 25 15 19 19 46 31
6 | 12 13 13 15 20 18 13 12 13 10 17 13 10 3 15 25 25 20 18 18 21 16 19 15
7 | 26 20 21 18 26 23 22 23 15 19 23 22 19 14 13 29 26 14 11 21 & & 25 15
8 | 13 16 6 14 9 15 10 18 12 11 11 17 11 11 18 27 34 19 15 16 19 61?30 20
9 | 8 16 9 18 11 16 10 22 15 20 15 17 15 17 16 42 35 30 12 18 15 16 18 23
10 | 26 19 20 28 20 15 19 19 15 14 12 16 16 12 29 20 35 28 21 17 11 31 26 23
11 | 96?18 12 19 30 19 18 16 22 24 18 18 25 18 21 42 43 25 24 20 27 33 22 27
12 | 28 31 18 22 28 30 24 19 29 23 23 19 19 18 24 40 35 27 29 32 27 29 21 30
13 | 23 34 28 26 25 35 23 34 40 44 46 32 25 19 17 38 35 39 30 29 18 28 24 20
14 | 18 18 13 27 20 14 25 31 19 22 26 29 23 23 25 42 37 35 24 21 36 56?83?48?
15 | 19 11 17 19 14 19 18 9 8 10 14 9 5 8 20 36 35 20 21 18 23 19 29 21
16 | 18 14 15 22 21 19 15 10 11 12 17 12 17 14 11 29 38 25 16 24 12 19 89?18
17 | 24 56 5 22 22 20 10 8 18 15 18 19 10 10 19 37 25 26 12 21 19 18 25 15
18 | 20 18 11 20 16 14 15 12 16 14 18 20 19 14 19 38 34 25 16 35 31 33 32 31
19 | 17 16 19 20 22 21 27 26 13 16 8 10 9 13 21 34 26 32 15 11 43 12 20 20
20 | 20 15 12 19 29 16 14 13 12 20 10 8 12 12 12 37 29 24 15 27 & & & 26
21 | 22 21 16 25 19 20 18 17 10 13 9 12 11 10 20 35 25 23 17 16 15 22 34 15
22 | 25 19 14 20 12 17 16 10 9 10 5 14 13 22 17 32 28 26 15 26 15 32 27 20
23 | 43 35 16 20 10 11 9 20 17 11 12 9 11 15 19 25 24 21 10 11 16 25 24 30
24 | 20 17 10 24 21 26 12 21 13 14 12 11 11 17 20 37 21 26 17 13 17 26 20 21
25 | 15 16 16 18 23 17 10 19 11 14 11 17 18 13 21 31 43 22 17 20 19 19 30 15
26 | 24 12 20 19 27 16 14 17 15 14 13 7 6 20 21 38 21 30 16 13 13 17 29 34
27 | 13 14 15 27 28 14 18 13 9 17 23 11 11 18 11 - - - - - 16 22 23 33
28 | 25 23 23 19 16 16 13 15 14 20 18 21 21 16 28 37 37 20 27 19 26 26 39 23
29 | 38 28 16 15 16 14 12 20 17 8 11 11 13 12 26 31 26 18 28 64 21 13 19 17
30 | 21 12 8 11 10 11 12 10 11 13 9 19 9 15 16 30 22 21 32 32 27 18 13 17
31 | 24 7 12 21 20 16 7 11 11 15 22 8 17 17 23 27 30 24 12 16 14 16 19 11
----+------------------------------------------------------------------------
1999| 0h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Aug| UT
Signal duration distribution for the above period
Duration (s) Number
< 0.1 4200
0.1 to 0.3 3708
0.3 to 1 2734
1 to 3 2228
3 to 10 1631
10 to 30 249
> 30 3
Note:
. lightning noise (&) on August 7 and 20.
R.B. Minton
---------------------------------------------------------------------------
Observer: Sadao Okamoto
Location: Damine Meteor Observatory, Japan (137.53 E, 35.07 N)
Transmitter: HAM beacon (JA9YDB) for RMO (50 W CW, 53.7500 MHz) by
JA9BOH Kimio Maegawa. No modulation except for identification.
Antenna: 2 element Cross Yagi 4 dBi aiming to Zenith. Omni-directional
in azimuth and elevation above 15 deg elevation.
Location: Fukui-NCT at Sabae city (136.2 E, 35.9 N)
At present time about 10 observers are listing for
Kimio Maegawa's 53.75 MHz beacon.
Receiver: IC575
Antenna: 2 element Yagi, pointed to the zenith.
Observing method: FFTDSP software, manual count.
Hourly echoes over 10 dB SNR
1999
Sep|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Sep|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 UT
---+--------------------------------------------------------------------------
1|46 35 40 39 48 48 49 35 19 25 24 30 23 22 13 22 -- 27 20 22 27 24 38 --
2|41 38 48 40 41 36 40 41 37 34 21 17 8 24 22 19 17 11 11 13 29 32 36@26
3|33 47 41 42 43 48 38 41 19 34 20 15 24 20 21 30 22 14 17 13 23 24 28\47
4|37 39 34 39 36 46 40 51 42 29 31 22 26 20 20 23@17 e@13 12 22 14 44 --
5|31 39 40 40 47 35 36 n n 33 20 24 12 14 16 n 17 12@18 n@20 27 24@28
6|18 35 37 38 46 43 37 29 30 24 7 24 11 14 18 20 16 21 9 17 17 26 22@22
7|35 34 42 40 36 34 45 47 40 24 21 24 27 28 28 28 12 16 8 11 19 27 28@27
8|33 39 40 38 38 37 52 47 41 31 20 21 28 38 15 17 23 9 15 12 16 22 31@40
9|39 40 40 38 44 59 52 39 40 38 36 16 28 28 19 8 18 10 13 21 20 24 35@33
10|39 33 46 35 37 55 35 31 43 26 15 18 24 40 20 14 16 14 13 11 33 30 44@30
11|32 44 43 40 43 41 51 33 37 32 28 21 26 21 20 19 18 -- 17 21 20 25 39 --
12|33 45 41 34 28 43 51 36 49 33 15 26 22 33 17 20 19 19 19 14 14 36 37@36
13|35 45 41 45 53 48 38 39 34 25 13 33 27 38 25 19 16 11 23 28 17 34 40@39
14|31 55 32 34 40 44 53 38 35 21 33 27 21 29 18 26 21@12 5 13 26 28 40@32
15|31 33 39 39 26 42 51 28 31 23@27 28 24 27 23 28 19 9 15 10 18 24 35 --
16|30 37 31 50 27 47 47 33 42 29 17 18 28 15 28 23 21 n n 18 21 33 29@27
17|35 48 33 35 29 38 45 34 29 17 23 29 17 18 19 20 21 17 15 17 23 34 40@34
18|35 33 31 37 45 50 53 45 38 26 17 25 29 28 24 21 15 13 15 15 20 41 24@52
19|28 30 52 43 41 40 39 42 41 23 26 41 20 27 15@15 15 12 9 15 20 30 40@38
20|38 35 31 48 46 44 31 36 37 26 22 24 34 21 37 23 12 10 18 16 25 33 27@37
21|30 49 38 40 32 32 30 37 37 23 25 21 14 22 16 15 16 10 13 10 22 20 18@38
22|31 34 39 41 36 42 48 31 31 23 24 25 19 19 20 25 14 7 14 11 34 22 20@25
23|26 41 27 41 48 41 38 45 43 23@14@34 16 17 23 14 11 10 10 9 12 26 35 --
24|28 26 38 39 45 43 42 64 37 34 33 35 35 20 f f f f f f f f f f
25| f f f f f f f f f f f f f f f f f f f f f f f f
26| f f f f f f f f f f f f@18 19 20 17 n n 13 17 28 35 39 --
27|32 44 44 50 43 54 47 48 36 28 26 21 33 23 26 n n n 16 16 14 18 31@33
28|32 32 57 39 35 41 46 38 41 38@30 n 12 24 20 15 20 10 12 15 16 23 26@37
29|34 33 54 50 45 55 29 37 39 22 18 26 19 22@30 n@18 18 10 17 18 33 26@30
30|30 33 54 44 46 55 57 49 42 n@27 18@15 @9 14@13@16 10 14 20 25 24 27@39
---+--------------------------------------------------------------------------
Sep|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 UT
Sep|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
1999
Echoes with duration > 5 s
1999
Sep|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Sep|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 UT
---+--------------------------------------------------------------------------
1| 2 1 3 3 1 2 1 1 4 1 1 1 1 --
2| 3 1 6 4 5 2 3 6 3 1 1 1 1 1 1 1
3| 1 3 4 3 10 4 3 1 3 3 1 1 1 1 1
4| 2 1 2 3 1 3 5 4 1 3 1 2 1 1 2 --
5| 3 2 2 2 1 2 2 1 1 2
6| 2 1 2 1 2 3 4 3 1 4 1 3 1 1 3 1
7| 2 3 5 2 2 4 5 3 3 1 3 3 1 1
8| 2 1 1 6 6 5 5 1 1 1 1 2 2 2
9| 2 3 1 2 3 4 6 4 3 2 2 2 2 1
10| 4 2 3 3 2 4 3 4 4 1 3 3 1 2 2
11| 1 2 7 3 2 5 4 2 7 1 2 1 2 2 1 3
12| 3 2 1 1 2 2 1 2 1 3 2 1 1 1 2 1 1
13| 1 1 3 2 1 5 3 2 3 1 1 2 2 1 1 1 2 2 1 3
14| 1 1 1 5 5 4 1 6 4 2 3 2 1 1 1 3
15| 1 3 7 3 2 7 3 2 4 1 4 1 2 2 1 1 1 --
16| 1 2 3 4 4 4 2 4 3 1 1 1
17| 2 2 1 3 2 2 1 3 2 1 1 1 1 1 1 3
18| 2 1 1 2 2 3 5 1 1 1 1 1 1 2
19| 1 2 2 4 2 4 1 3 4 1 3 2 1 1 1 2 1 2
20| 1 1 6 3 2 1 3 1 2 2 1 2 2
21| 2 3 2 2 1 3 2 5 1 1 4 2 1 1 1 1 2
22| 1 2 4 5 4 4 1 1 2 3 1 1 2 1 1 1
23| 2 2 1 2 5 5 6 6 6 1 1 1 3 --
24| 4 1 2 3 2 1 3 5 3 f f f f f f f f f f
25| f f f f f f f f f f f f f f f f f f f f f f f f
26| f f f f f f f f f f f f 1 1
27| 2 1 1 3 1 5 1 1 1 4 1
28| 1 4 2 1 4 6 4 4 2 2 2 2 1 2 1
29| 3 4 1 1 3 3 2 1 2 4 3 1
30| 2 1 3 2 1 4 8 7 1 3 1 1 1
---+--------------------------------------------------------------------------
Sep|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 UT
Sep|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
1999
Daily rate of long echoes (T > 20 s)
1999
Sep 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----------------------------------------------------------------
Count 1 4 2 2 0 0 6 7 6 9 3 2 1 4 2
Sep 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
----------------------------------------------------------------
Count 2 1 3 3 3 3 4 5 (2) (1) (1) 2 4 3 3
Notes:
-: lost counts because of high noise level or machine failure.
@: hourly rate estimated by effective observation time less than 60 min.
n: contamination due to radio noise or interference.
e: contamination due to sporadic E opening.
f: no data available due to TX or RX failure.
JST = UT + 9 hours
Sadao Okamoto
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. CONTRIBUTORS / USEFUL ADDRESSES
Enric Fraile Algeciras (EA3BTZ)
C/ Moianes 19-21 Esc. A 6º 1ª, E 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
Eisse Pieter Bus
Groningen, Netherlands
E-mail: epbus@wxsdot nl
Maurice De Meyere (ON4NU)
Hullekensstraat 24, B-9831 Deurle, Belgium
tel: +32 (9) 282 35 26
E-mail: mauricedot demeyere@planetinternetdot be
University of Ghent, Astronomical Observatory
Krijgslaan 281(S9), B-9000 Gent, Belgium
E-mail contact: Paul@izar.rug.acdot be, Pierredot deGroote@rug.acdot be
Werfried Kuneth
Ferndorf, Austria
E-mail: kuneth@net4youdot net
http://www.qsldot net/oe8fnk
Alastair McBeath
IMO: International Meteor Organization
12A Prior's Walk, Morpeth, Northumberland, NE61 2RF, England, U.K.
E-mail: vice_president@imodot net
R.B. Minton
Astrometric Observatory
568 North First Street, Raton, NM 87740, USA
tel: +001 (505) 445 7009
Sadao Okamoto
E-mail: okamoto@jim.sugiyama-u.ac.jp
Chris Steyaert, VVS
Kruisven 66, B-2400 Mol, Belgium
tel: +32 (14) 31 51 04
E-mail: steyaert@vvsdot be
Compuserve: 72650,3513
Garfield Tsao (BM2EQB)
LonTan Observatory, LonTan, TauYan, Taiwan
E-mail: tsao5916@ms17.hinetdot net
http://www.geocities.com/Eureka/Office/1528 (in Chinese)
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
--
Christian Steyaert (RMOB9909) 8 October 1999
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