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(meteorobs) Radio Meteor Obs. Bull. April 2000
Radio Meteor Observation Bulletin No. 81 May 2000
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: Biedenkopf C2 TV, Video Frequency 48.250 MHz,
ERP 100 kW, Azimuth 90 +/-65
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: own written software "MSD" with sound card.
| Apr 2000
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----+--------------------------------------------------------------
0h| 15 9 12 27 19 11 22 13 11 8 4 4 18 3 6
1 | 8 6 5 18 12 14 16 16 11 6 5 5 10 2 7
2 | 6 6 13 26 14 10 17 7 6 8 5 11 3 2
3 | 3 6 8 12 17 8 17 15 17 9 5 3 6 0 6
4 | 6 9 11 17 22 13 10 23 3 4 6 2 13 5 2
5 | 4 18 5 24 29 14 27 22 10 14 6 5 15 6 6
6 | 10 16 6 16 19 19 23 24 13 9 7 6 9 6 8
7 | 16 9 21 19 16 15 62 21 20 13 4 10 31 5 7
8 | 11 26 41 19 28 72 21 7 5 8 35 13 10 15
9 | 8 29 62 31 24 25 23 18 9 11 27 34 9 10
10 | 8 36 36 18 16 26 59 9 1 8 21 16 7 8
11 | 13 5 14 23 8 6 12 7 7 0 5 15 22 7 9
12 | 11 5 9 18 16 9 13 11 9 2 3 13 17 7 3
13 | 10 9 19 21 13 17 14 13 10 18 1 10 19 8 13
14 | 10 10 18 19 20 12 14 10 9 14 6 20 12 6 5
15 | 7 6 18 16 7 6 4 10 15 11 2 15 15 14 5
16 | 4 9 15 11 8 5 15 2 5 3 1 15 13 5 1
17 | 5 2 8 7 13 10 9 11 2 6 6 14 13 3 5
18 | 6 2 13 15 4 9 2 7 14 0 6 11 2 1
19 | 9 9 11 14 9 5 5 6 6 5 4 18 1 1 4
20 | 6 9 17 5 5 10 11 6 9 4 2 10 7 8 0
21 | 12 1 20 23 18 15 13 21 8 10 6 6 2 10 6
22 | 19 7 16 14 17 15 19 17 13 7 2 20 5 7 8
23 | 18 7 11 20 14 19 21 9 14 11 2 20 0 4 2
----+--------------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Apr 2000
| Apr 2000
UT | 16 17 18 19 20 21 22 23 24
----+--------------------------------------
0 | 2 3 3 4 3 8 30 11 4
1 | 3 7 2 3 7 10 13 18 5
2 | 2 4 3 7 1 9 15 19 3
3 | 4 4 0 3 8 3 16 4 3
4 | 10 6 5 7 12 7 9 12 5
5 | 9 5 10 11 3 4 10 9 15
6 | 2 11 6 17 6 12 4 15 15
7 | 21 10 7 10 11 27 19 33 23
8 | 9 24 12 10 21 24 30 11 8
9 | 7 5 20 8 16 23 17 6 14
10 | 7 21 10 7 13 33 12 7 12
11 | 17 5 6 7 8 9 12 6 7
12 | 2 6 3 12 8 7 21 4 28
13 | 6 8 14 5 13 12 8 2 5
14 | 9 12 13 8 18 13 16 8 7
15 | 5 6 6 6 6 9 9 7 4
16 | 1 8 6 1 5 8 4 4 4
17 | 1 7 7 4 4 5 10 4
18 | 2 0 2 10 4 9 4 7
19 | 2 3 5 5 7 11 3 3
20 | 3 6 5 1 3 3 6 4
21 | 5 4 5 4 11 9 12 10
22 | 4 3 3 6 5 28 10 6
23 | 3 8 5 8 16 21 11 4
----+--------------------------------------
UT | 16 17 18 19 20 21 22 23 24
| Apr 2000
Enric Fraile Algeciras
---------------------------------------------------------------------------
Observer: Michael Boschat
Location: Halifax, Canada (63 36'W, 44 39'N, 58 meters above sea level)
Listening Frequency: 83.24 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: CW
Recording method: listening by ear
April 2000
Number of meteors heard in one hour interval
2000| UT
Apr | 09h 10 11 12 13 14 15 16 17 18
----+---------------------------------------
05 | - - - 18 31 24 17 - - -
19 | - - - 11 21 24 15 - - -
20 | - - 20 19 26 27 29 19 13 -
21 | - - 9 22 20 17 28 26 18 11
22 | - - 12 17 19 - - - - -
----+---------------------------------------
| 09h 10 11 12 13 14 15 16 17 18
Notes:
. no corrections for radiant position made to the counts.
. - = no observations made.
. * = interference
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 Ghent University format (Prometeos), and are
available for further analysis. Reduction software for DOS and
Windows available].
April 2000
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Apr | UT
2000 | 20h 21 22 23 00 01 02 03 04 05 06
------+------------------------------------------------------
1- 2 | 20 14 1 2 1 11 48 54 108 64
2- 3 | 22 ? ? 2 7 31 35 ? ? ?
3- 4 | 19 8 3 1 8 32 41 96 101 50
4- 5 | 20 7 7 2 8 42 41 88 87 ?
5- 6 |
6- 7 | 30 3 36? 3 10 27 44 61 35 41
7- 8 | 22 44? 19? 23 8 39 63 55 98 49
8- 9 | 9 26? 2 7 9 9 47 72 ? 96
9-10 | 14 8 1 12 7 35 52 64 57 97
10-11 | 12 19 7 4 9 19 51 50 68 86
11-12 | 26 4 2 1 10 38 48 52 49 73
12-13 | 23 5 2 3 8 25 47 59 59 69
13-14 | 9 8 2 6 14 32 67 78 74 111
14-15 | 20 12 7 5 9 33 55 48 83 38
15-16 | 11 16 20 3 2 10 51 39 72 90
16-17 | 0 16 20 5 1 11 28 54 28 64
17-18 | 18 25 2 0 10 34 86 48 69 70
18-19 |
19-20 | 23 22 16 7 3 11 52 67 ? ? 72
20-21 | ? 26 ? 10 5 13 42 79 29 108 59
21-22 | 53? 78? 2 3 4 13 44 83 84 95 67
22-23 | 28 16 1 0 1 4 19 63 63 79 101
23-24 | ? ? 38? 60 4 12 52 83 ? ? 103
24-25 |
25-26 | 3 20 20 2 3 10 21 36 39 91 38
26-27 | 33 26 20 1 0 21 41 68 ? 73 11
27-28 | 22 22 2 3 7 22 40 66 54 ? ?
28-29 | 34 25 1 6 2 16 31 81 93 101 43
29-30 | 36 19 2 6 2 4 16 59 78 ? ?
30- 1 | 29 2 11 ? ?
------+------------------------------------------------------
2000 | 20h 21 22 23 00 01 02 03 04 05 06
Apr | UT
Raw counts of reflections with a duration of at least 1.000 s
during one hour interval starting at UT:
Apr | UT
2000 | 20h 21 22 23 00 01 02 03 04 05 06
------+-------------------------------------------------------
1- 2 | 1 1 0 0 1* 1 4 14* 29? 15*
2- 3 | 12* ? ? 2* 0 7* 3 25* ? 32*
3- 4 | 1 0 1* 0 3* 7* 6 16 15 5
4- 5 | 3 3* 0 0 0 0 7 12 17 ?
5- 6 |
6- 7 | 5 0 ? 1* 1 2 1 10 3 2
7- 8 | 5* 7 4* ? 1 11? 10 10 16 6
8- 9 | 6* 3 1* 0 0 0 5 14 ? 18
9-10 | 7* 0 0 6* 1 0 5 8 16* 23*
10-11 | 1 2* 2* 2* 1 1 6 11* 14* ?
11-12 | 3 1* 0 0 2 6 2 8 4 13
12-13 | 3 1 0 1* 1 7* 5 7 12* 26*
13-14 | 1 1 1* 1 1 4 7 ? 12 22
14-15 | 1 2 4* 2* 2* 3 6 7 10 6
15-16 | 2 2 5* 0 0 2 7 1 8 24*
16-17 | 0 1 5* 1 0 5* 2 11* 0 17
17-18 | 3 6* 0 0 0 4 12 1 1 17*
18-19 |
19-20 | 4 3 8? 3* 0 4 12? 7 ? ? 20*
20-21 | 12 8* 34? 3* 1 0 8 17* 22 27* 14*
21-22 | 14* 18* 0 2* 0 2 4 11 10 29* 7
22-23 | 8* 2 0 0 0 1* 4* 4 11 19 15
23-24 | ?* ? 21? ? 1* 2 4 10 ? ? ?
24-25 |
25-26 | 0 8? 1 0 0 1 1 4 11* ? 7
26-27 | 3 10? 6? 0 0 3 6 12 ? 17* 2
27-28 | 2 4 0 1* 3* 4 3 8 4 ? ?
28-29 | 5 3 0 1 1* 2 5 10 20* 25* 7
29-30 | 6 4* 1* 1 0 0 0 10* 20* ? ?
30- 1 | 6* 0 3* 6 6
------+-------------------------------------------------------
2000 | 20h 21 22 23 00 01 02 03 04 05 06
Apr | 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
Maurice De Meyere
----------------------------------------------------------------------
Observer: Didier Favre
Location: Annecy, France, 6 08' E, 45 55'
Frequency: 105.75 MHz
Antenna: 3 elements Yagi, direction North-East, elev. 60 deg
Receiver: Tuner Yamaha TX-480L
Observing method: METEOR v 4.0 on a 66 MHz PC486, THRESHOLD = 6
The recordings have been corrected in displaying the RAW
file with Colorgramme v1.5
| Apr 2000
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+-----------------------------------------------------------
0h| 1 0 0 0 0 0 0 0 0 2 2 7 3
1 | 0 0 0 0 0 0 0 0 0 6 1 3 1
2 | 0 0 0 1 0 0 1 0 0 4 2 3 1
3 | 0 0 0 0 0 0 0 0 0 7 2 5 0
4 | 0 0 1 0 0 0 2 0 1 3 3 3 0
5 | 1 6 0 0 0 0 1 0 0 4 2 0 2
6 | 0 0 0 0 0 0 1 0 0 0 1 2 1
7 | 0 0 0 0 0 0 0 0 0 4 4 2 5
8 | 0 1 0 0 0 0 0 1 0 4 5 3 8
9 | 0 0 0 1 0 1 0 0 0 1 1 2 6
10 | 0 0 0 0 1 0 0 0 0 5 0 1 2
11 | 11 0 0 0 0 0 0 0 0 5 9 1 2
12 | 2 0 1 0 0 1 0 0 0 0 5 6 1
13 | 1 0 1 0 0 0 1 0 0 2 2 5 13
14 | 5 1 0 0 0 0 4 0 1 7 0 5 8
15 | 1 0 0 0 0 0 1 0 0 2 0 0 0
16 | 0 0 0 0 0 0 0 1 1 1 0 2 0
17 | 0 0 0 0 0 0 0 0 0 4 4 2 2
18 | 0 0 3 0 0 0 0 0 0 0 3 0 2
19 | 0 0 3 0 0 1 1 0 0 1 0 0 3
20 | 0 0 3 1 0 0 0 0 1 1 2 0 0
21 | 0 0 0 0 0 0 0 0 1 0 0 0 0
22 | 0 0 1 0 0 0 0 0 1 1 1 2 1
23 | 0 0 0 0 0 0 0 1 2 6 0 5 2 0 1
---+-----------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Apr 2000
| Apr 2000
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+-----------------------------------------------------------
0 | 2 4 3 1 2 3 0 0 0 0 0 3 1 - 0
1 | 1 4 1 3 1 2 2 - 0 1 1 1 0 0 1
2 | 1 0 2 4 1 3 8 0 1 0 1 0 0 1 4
3 | 3 1 0 0 1 11 0 1 0 1 0 0 2 3 -
4 | 4 7 1 2 1 0 1 3 5 0 1 5 0 1 -
5 | 3 1 6 0 4 3 0 3 1 1 2 2 3 3 -
6 | 1 0 5 0 2 1 0 0 6 1 1 5 4 2 -
7 | 11 1 1 4 1 4 1 6 2 1 6 2 4 1 -
8 | 1 4 1 1 2 2 3 3 0 1 1 4 1 0 -
9 | 3 3 3 1 0 0 1 1 2 5 8 5 0 - -
10 | 1 0 1 0 1 4 1 1 1 6 2 2 0 - -
11 | 2 2 0 0 2 0 0 2 2 - - 0 2 1 -
12 | 1 1 5 0 0 0 0 0 ? 4 0 0 0 - 1
13 | 0 0 1 3 0 2 1 - 3 10 - - 1 0 1
14 | 3 6 1 0 1 5 1 0 1 0 2 1 0 - 1
15 | 0 1 3 0 0 - 0 0 3 0 1 3 4 2 1
16 | 0 0 1 1 0 8 0 0 3 0 2 1 - 0 -
17 | 1 1 0 1 0 5 0 0 0 1 2 3 1 - -
18 | 0 0 2 0 0 3 1 0 0 0 0 0 1 - -
19 | 1 1 2 0 0 2 1 0 0 2 0 1 - - -
20 | 1 1 1 2 0 2 1 0 1 1 0 0 - - -
21 | 1 4 2 2 0 1 1 2 0 0 0 1 1 0 0
22 | 4 3 1 0 0 0 1 0 1 1 0 0 1 0 0
23 | 0 3 3 1 0 1 2 0 0 1 1 2 0 0 0
---+-----------------------------------------------------------
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
| Apr 2000
Didier Favre
----------------------------------------------------------------------
Location: Astronomical Observatory, Ghent University, 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.
-------------------------------------------------------------
| Apr 2000 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 2 7 4 2 2 3 12 2 4 2 1 2 3 1 5
1 | 5 3 6 2 11 1 3 9 12 2 4 3 2 2 2
2 | 4 10 20 5 13 17 15 8 6 11 6 10 7 7 15
3 | 14 35 11 25 25 17 16 31 37 32 31 20 13 26 33
4 | 18 13 10 41 12 19 14 22 14 18 47 22 18 16 26
5 | 14 12 18 21 51 14 22 25 21 17 27 25 11 17 38
6 | 12 22 18 21 14 23 22 24 33 19 18 35 25 57 42
7 | 20 28 13 18 10 15 26 27 13 11 13 22 22 23 35
8 | 24 20 37 13 19 16 12 53 16 12 12 9 18
9 | 30 22 21 22 6 22 34 19 34 15 20 13 24 31 19
10 | 13 12 16 16 18 15 14 51 35 18 12 18 12 27 34
11 | 19 23 52 19 22 10 8 25 18 21 13 10 13 33 31
12 | 25 19 11 14 12 7 5 24 18 6 11 6 14 13 24
13 | 9 6 9 15 8 7 7 15 13 5 4 7 4 11 19
14 | 15 4 8 7 4 14 7 7 28 14 6 6 7 6 10
15 | 4 4 6 8 6 6 6 10 7 3 8 2 4 13 8
16 | 4 4 1 10 3 2 5 2 2 5 7 4 8 10 4
17 | 3 9 4 16 3 2 15 8 4 16 8 9 8 3 4
18 | 6 1 10 7 3 3 2 2 5 10 8 4 21 5 5
19 | 5 4 2 5 5 3 22 4 6 3 5 7 10 3 5
20 | 6 6 3 7 7 3 12 8 4 7 7 2 4 13 21
21 | 3 11 3 5 3 25 8 6 3 6 13 5 2 21 9
22 | 2 0 1 7 1 1 1 3 4 1 1 2 2 1 22
23 | 2 3 1 5 5 1 12 3 1 1 1 1 2 1 0
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-------------------------------------------------------------
| Apr 2000 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+------------------------------------------------------------
0 | 3 1 6 3 3 6 7 7 12 5 8 1 11 2 4
1 | 2 1 7 2 13 9 6 8 4 6 4 7 9 6 15
2 | 7 13 11 21 15 36 31 16 11 10 15 25 17 15 14
3 | 33 23 50 18 16 49 110 50 28 23 38 41 26 40 44
4 | 12 15 30 22 33 42 70 35 31 18 36 44 21 24 28
5 | 28 17 54 33 17 60 90 32 41 27 29 44 21 41 46
6 | 17 32 40 20 13 33 60 55 29 43 15 32 16 60 57
7 | 38 7 32 26 16 44 75 67 67 29 26 23 40 53 61
8 | 57 14 30 22 38 41 89 49 57 35 40 48 20 54 34
9 | 43 9 24 22 29 26 61 43 60 55 23 15 46 89
10 | 30 15 32 20 27 29 34 48 18 33 16 27 14 53 45
11 | 15 15 15 37 28 20 33 31 48 20 29 15 39 46
12 | 23 19 10 22 31 14 29 30 41 23 15 64 20 23 42
13 | 32 8 15 13 15 19 19 18 19 15 7 20 19 31
14 | 8 5 20 13 14 6 7 11 10 15 6 13 10 19 22
15 | 5 4 5 3 4 7 13 14 6 24 5 7 6 10 14
16 | 8 3 9 5 3 4 12 11 5 3 3 10 9 11 4
17 | 9 3 7 9 3 11 10 8 6 4 5 3 9 5 9
18 | 10 5 4 7 7 12 22 6 15 5 2 12 5 9 4
19 | 11 5 19 3 21 28 5 4 5 5 6 3 5 6 4
20 | 4 15 9 6 14 22 15 9 6 13 6 11 8 5 5
21 | 3 9 18 3 3 43 7 4 5 8 10 13 2 2 14
22 | 1 3 6 2 2 1 1 3 5 1 2 3 2 11 1
23 | 2 2 2 3 9 1 1 4 5 1 1 1 2 3 1
---+------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Notes:
. the Lyrids show up nicely, notwithstanding the current constraints.
. also noticeable is the slight increase towards the end of the month
which continues in May (apparently starting slightly earlier than
during the previous years).
Pierre De Groote
---------------------------------------------------------------------------
Observer : Rafael Haag
Location : Porto Alegre, Brazil ( 51 10' W, 30 30' S)
Frequency: 83.25 MHz
Receiver: home made convertor, 1.5 dB noise and Sony ICF-7600G as FI.
0.2 uV for 10 dB S/N
Transmitter Location: many stations, video carrier C6
Antenna: 2 element Yagi, elevation 90 deg (zenith)
Observing method: the audio signal of the video carrier is fed into PC sound
port.
April 2000
Number of meteors heard in one hour interval
UT | Apr 21 Apr 22 Apr 23
----+-----------------------------
00h| 23 26 25
01 | 25 29 29
02 | 35 39 33
03 | 49 58 40
04 | 55 59 42
05 | 63 76 65
06 | 60 68 72
07 | 65 72 69
08 | 61 65 71
09 | 54 58 61
10 | 56 53 52
11 | 47 47 43
12 | 43 46 50
13 | 39 31 44
14 | 33 35 29
15 | 31 32 30
16 | 22 28 24
17 | 15 22 17
18 | 18 16 17
19 | 16 20 14
20 | 17 18 15
21 | 21 24 19
22 | 20 24 23
23 | 19 27 25
Note: I think this is the first bulletin of a Brazilian Forward Scatter Meteor
Station! From May or June onwards, the Radio Meteor Observatory
will be operating permanently.
Rafael Haag
---------------------------------------------------------------------------
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, with manual 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 radio fireball statistics, and the original leonids 1999 peak recordings.
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 3.5 seconds
| Apr 2000
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0| 3 0 5 3 3 2 1 2 6 6 9 1
1| 6 1 3 1 7 3 4 9 3 4 6 5
2| 6 2 11 10 4 4 4 5 7 6 6 6
3| 6 7 9 5 7 10 1 3 2 2 2 4
4| 5 6 6 2 5 12 11 7 7 2 6 11
5| 4 13 4 11 6 1 6 4 12 8 6 5
6| 2 4 12 6 10 11 11 9 9 6 10 12
7| 10 7 8 10 12 5 11 12 12 12 14 8
8| 5 9 6 13 12 4 12 8 4 8 8 11
9| 9 5 10 6 11 10 8 4 6 5 4
10| 7 10 10 4 5 5 4 10 3 10 4
11| 7 3 5 5 6 10 1 7 5 12 9 3
12| 1 3 3 7 4 6 7 7 4 9 8 7
13| 4 2 6 5 6 6 3 3 4 8 3 7
14| 1 2 3 1 4 4 3 3 4 5 2
15| 0 2 3 2 3 0 0. 3 4 2 0 2
16| 1 0 1 1 4 0 0 0 2 1 1
17| 3 1 3 1 1 1 0. 2. 3 0 0 2
18| 1 2 1 3 0 0 0 1 3 1 2 2
19| 0 2 3 2 0 1 1 2 4 0 4 2
20| 4 2 2 1 0 4 0 5 0 4 1 0
21| 1 6 1 6 3 1 7 1 2 1 1 4
22| 2 1 2 3 3 4 0 3 4 1 2 2
23| 2 2 6 2 4 4 3 4 1 1 5 8
---+------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Apr 2000
| Apr 2000
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+------------------------------------------------------------
0| 2 6 0. 6 8 9 12 9 4 7 5 1 4 9 5
1| 7 2 8 9 16 11 9 4 5 6 5 2 7 8
2| 3 6 9 4 7 11 7 2 2 2 9 5 8 8
3| 3 7 6 16 10 16 10 6 5 2 3 10 3 10
4| 12 13 9 13 15 19 20 8 9 9 14 3 3 8
5| 6 10 0. 10 10 18 21 7 9 8 9 13 13 15. 14
6| 3 9 12 10 9 14 9 7 9 7 10 8 11 10 19
7| 3 13 10 10 13 15 20 22 8 8 7 12 8 13 9
8| 10 9 6 15 11 13 14 5 12 12 10 17 13 5
9| 6 7 5. 9 5 8 12 4 6 9 5 7 7 4 5
10| 7 12 10 6 4 3 8 11 5 6 11 6 6 12 16
11| 11 9 3 4 6 5 12 11 10 14 8 8 16 6 9
12| 12 7 7 6 2 7 7 8 5 11 11 4 14 5 5
13| 5 5 5 1 6 4 8 6 5. 4 10 6 5 4 7
14| 3 7 0 2 2 4 0 3 4 7 4 5 3 2 0
15| 0 4 4 1 1 3 2 0 3 0 2 0. 3 0 0
16| 2 2 3 0 4 0 0 4 2 1 1 4 1 3
17| 1 2 3 0 2 0 0 2 1 1 0 2 2 1
18| 0 2 0 1 3 0 3 1 0 2 1 2 1 0 1
19| 2 1 0 4 2 1 3 1 1 1 1 1 2 2 0
20| 3 2 2 2 4 4 2 3 3 4 2 1 2 4 2
21| 1 4 0 1 6 9 3 3 2 1 3 2 0 3 1
22| 8 3 3 4 14 6 7 1 1 4 3 3 5 1
23| 5 4 5 5 3 14 5 3 8 4 7 5 3 5 3
---+------------------------------------------------------------
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
| Apr 2000
Propagation overview for April 2000
E : sporadic-E or E-layer propagation
F : FAI (field aligned irregularity)
- : propagation only via meteor echoes.
(blank) : no data available
| Apr 2000
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
---+------------------------------------------------------------
0| - - - - - - - - - - - - - - - - - - - - - - - - - - -
1| - - - - - - - - - - - - - - - - - - - - - - - - - -
2| - - - - - - - - - - - - - - - - - - - - - - - - - -
3| - - - - - - - - - - - - - - - - - - - - - - - - - -
4| - - - - - - - - - - - - - - - - - - - - - - - - - -
5| - - - - - - - - - - - - - - - - - - - - - - - - - - -
6| - - - - - - - - - - - - - - - - - - - - - - - - - - -
7| - - - - - - - - - - - - - - - - - - - - - - - - - - -
8| - - - - - - - - - - - - - - - - - - - - - - - - - -
9| - - - - - - - - - - - - - E - - - - - - - - - - - -
10| - - - - - - - - - - - - - E - - - - - - - - - - - -
11| - - - - - - - - - - - - - - E - - - - - - - - - - - -
12| - - - - - - - - - - - - - - - - - - - - - - - - - - -
13| - - - - - - - - - - - - - - - - - - - - - - - - - - -
14| - - - - - - F - - - - - - - - - - - - - - - - - - - -
15| - - - - - - F F - - - - - - - - - - - - - - - - - - -
16| - - - - - - F F - - - - - - - - - - - - - - - - - -
17| - - - - - - - F - - - - - - - - - - - - - - - - - -
18| - - - - - - - - - - - - - - - - - - - - - - - - - - -
19| - - - - - - - - - - - - - - - - - - - - - - - - - - -
20| - - - - - - - - - - - - - - - - - - - - - - - - - - -
21| - - - - - - - - - - - - - - - - - - - - - - - - - - -
22| - - - - - - - - - - - - - - - - - - - - - - - - - -
23| - - - - - - - - - - - - - - - - - - - - - - - - - - -
---+-------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
| Apr 2000
Notes:
. Lyrids active from April 19 to 22.
. from April 25 the Eta Aquarids activity starts.
. local time conversion: 2 hours ahead of UT (6h local = 4 h UT).
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
March 2000
Mar| UT
2000| 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 | 6 7 10 5 12 8 5 6 4 4 7 6 4 10 3 10 13 11 14 10 9 10 16 11
2 | 12 8 14 31 5 7 2 4 3 0 3 3 0 5 4 2 10 1 7 4 5 6 9 11
3 | 8 5 4 5 6 6 6 6 4 2 4 3 4 3 4 3 13 12 12 7 7 4 9 11
4 | 13 7 11 9 10 9 4 7 7 3 4 5 7 4 7 1 17 9 11 6 5 4 11 22
5 | 16 4 3 0 0 0 1 2 2 7 4 3 3 5 2 3 0 20 7 3 6 2 4 6
6 | 3 5 7 4 4 3 4 4 4 6 3 2 2 4 3 7 10 9 13 9 3 6 6 6
7 | 4 8 13 5 9 2 7 9 5 8 2 4 5 2 9 1 10 17 21 5 6 3 7 7
8 | 4 5 13 10 3 3 4 6 4 8 8 2 5 5 9 6 19 19 11 9 7 2 5 8
9 | 9 16 11 13 7 8 2 3 3 4 5 11 6 11 4 10 19 11 13 5 6 2 5 4
10 | 13 2 5 6 6 8 3 4 2 3 10 6 10 4 2 9 17 12 17 7 12 13 24 4
11 | 7 2 2 7 3 1 1 2 4 1 4 5 3 1 8 9 11 24 6 5 8 4 6 1
12 | 0 2 5 10 8 8 9 6 5 1 2 3 2 10 0 0 8 3 9 10 8 11 7 8
13 | 9 3 13 7 3 5 5 4 4 6 5 4 3 3 3 3 5 16 15 8 9 2 7 7
14 | 17 19 8 5 6 4 4 4 7 2 1 2 2 11 5 6 11 3 1 4 4 5 6 5
15 | 3 0 0 4 9 6 2 5 3 1 4 8 3 1 2 12 12 11 12 6 8 3 7 8
16 | 4 4 7 7 7 6 5 2 6 7 8 2 3 5 3 6 12 15 15 7 5 0 1 1
17 | 0 1 0 0 4 4 6 4 4 5 4 2 5 5 13 9 13 7 6 9 3 9 5 2
18 | 3 3 0 2 5 14 5 3 6 2 4 6 4 4 3 4 5 6 10 8 6 6 10 10
19 | 8 9 6 3 12 14 3 3 11 8 3 2 6 5 6 5 14 8 14 10 10 1 0 0
20 | 1 2 1 0 1 0 0 0 1 0 0 1 2 3 0 0 2 13 15 9 5 3 4 7
21 | 4 10 8 6 5 4 1 3 4 3 3 1 7 3 7 2 14 12 14 7 3 6 5 9
22 | 2 0 12 2 6 3 9 6 8 1 3 2 4 4 3 1 5 2 5 6 8 8 2 4
23 | 8 3 6 6 7 8 1 11 7 5 12 4 4 6 3 4 22 22 12 20 10 6 6 12
24 | 3 2 7 5 0 3 8 3 6 2 10 9 3 3 7 8 14 7 2 5 1 0 1 0
25 | 2 3 5 4 4 5 3 6 1 2 6 7 7 0 2 0 11 5 4 3 5 6 0 1
26 | 2 10 7 15 9 14 6 4 7 7 1 5 2 3 0 1 12 13 20 8 0 1 6 9
27 | 8 5 10 7 4 3 3 3 8 5 5 4 5 4 8 10 7 20 17 9 3 6 9 11
28 | 7 4 10 2 7 3 5 1 6 3 0 6 3 6 3 10 13 16 12 10 8 14 6 15
29 | 13 12 17 7 4 1 1 0 5 3 4 6 5 5 8 12 26 16 6 12 7 3 13 14
----+------------------------------------------------------------------------
2000| 0h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mar| UT
Signal duration distribution for the above period
Duration (s) Number
< 0.1 1335
0.1 to 0.3 1016
0.3 to 1 845
1 to 3 700
3 to 10 285
10 to 30 10
> 30 0
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
2000
Apr|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23LT
Apr|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14UT
---+-------------------------------------------------------------------------
1 |37 39 38 45 44 35 37 27 n n n n n n n n n n n n n n e e
2 |26 29 40 38 36 25 29 24@23 n --@16 10@12 n 9 3 5 7 13 21 24 28 35
3 | n 25 32 38 36 27 42@32 -- 26 23 n n n n n n 2 6 e 13 28 17 22
4 |40 29 47 37 35 45 34 55 n 14 n 7 8 7 7 8 3 6 6 13 9 e e e
5 |20 38 34 33 30 44 44 44@33 33 24 26 19 17 17 21 10 5 10 13 9 22 25 20
6 |28 29 35 47 36 25 14 n n n n n n n n n n n n 7 7 30 28 29
7 @33 25 48 42 46 36 35 63@36 26 23@32 n@10 3 6 4 8 6 9 15 28 22 32
8 |28 37 38 39 40 47 55 38@18 n n n n n n n n n n 5 11 e e e
9 | e 51 40 45 35 31 45 41@36 27 23 16 13 18 8 8 5 3 2 10 18 22 17 23
10 |27 30 28 37 40 32 36 31@30 38 23 24 24 24@20 11 11 6 7 9 17 27 34 e
11 | e 35 25 27 37 n n n n n n n n n n n n n n 1 12 21 16 24
12 |41 42 37 35 56 44 59 34@25 n n 11 @8 n n n n n 8 7 14 21 e e
13 | e e 30 39 29 41 58 55@33 n n n n n n n n n 4 2 13@21@26 14
14 | e e@51 42 52 49 47 36@34 27 25 13 20 10 11 12 6 7 6 7 10 15 18 19
15 |30@30 38 30 36 35 41 47@32 28 17 27 24 19 7 7 -- 14 7 9 14 24 e e
16 | e e 36 49 27 47 43 46@45 32 n 16@13 n n n n n n 5 9 18 41 31
17 |38 27 34 32 32 45 45 24 n n n n n n n n n 3 4 15 14 32 45 37
18 | e@45 38 38 51 41 38 24 n n n n n n n n 9 5 17 10 14@18 e e
19 | e e e 34 29 37 52 49@36 25 17 8 7 16 6 12 7 7 10 9 19 24 19 22
20 |22 37 42 30 24 42 58 49@54 45 22 29 26 26 7 5 1 6 2 6 19 23 37 41
21 |38 43 40 31 39 56 44 43@48 31 22 14 19@27 n @6 n n e 8 17 34@40 n
22 | e 45 60 32 60 65 56 n n 27@13@12 14 12 n n 3 4 8 9 10 17 22 19
23 |25@31 29 40 42 50 35 39@10 18 7 n n n n n n n n 6 4 14 e e
24 | n 21 41@25 35 42 30 26@19 17 n @8 12 17 20 15 8 7 13 12 12 19 29 23
25 |26 33 34@39@33@35@42 25@33 n n n n n n n n n n 7 22 n n n
26 | e@26 44 38 33 32 46 44@47 36 30 23 32 23 14 16 11 n 4 8 13@10 e e
27 | e e 30 28 34 31 50 47@30 26 19 15 8 12@17 n 9 7 7 7 11 16 23 29
28 @19 31@36@42 34 48@39@21@14 17 n n n n n n e e 3 12 11 19 35 22
29 |20 45 19 21 18 32 39 24 n n n n n n@18 n @7 1 7 3 20 25 34 34
30 |33 36 37 34@38@38 37 50 20 17 n 10 18 n n n e e 4 8 11 27 34 25
---+-------------------------------------------------------------------------
Apr|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14UT
Apr|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23LT
2000
Echoes with duration > 5 s
2000
Apr|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23LT
Apr|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14UT
--+-------------------------------------------------------------------------
1 | 1 2 1 4 3 2 1
2 | 1 3 4 2 2 4 3 2 1 1
3 | 2 2 2 2 4 1 2 1
4 | 1 2 1 1 1
5 | 2 1 1 3 2 1 2 1 1 1
6 | 2 3 5 2
7 | 1 1 1 1 3 2 3 2 1 1 1
8 | 2 2 5 3 2 1
9 | 4 1 3 1 1 3 2 1 2 1 1 2 1
10 | 2 2 2 2 1 1 3 1 1 1 1
11 | 2 1 3
12 | 2 1 1 1 1 1 4 1
13 | 1 6 5 1 1
14 | 4 2 4 3 2 1 6 1 2 2 1 1
15 | 1 2 1 4 4 4 1 6 1
16 | 1 1 5 2 4 1 3 1 1
17 | 1 8 3 1 1
18 | 1 2 3 2 2 1 2
19 | 3 4 3 3 2 1 1 1 1
20 | 1 2 1 1 2 1 2 3 2 3 2
21 | 3 3 1 8 3 3 2 1 1 1 1
22 | 6 5 2 9 11 10 3 1 1 1
23 | 2 2 3 8 5 10 9 3 1
24 | 1 5 5 4 4 3 1 1
25 | 1 1 1 1 1 1 2 4
26 | 4 1 2 1 3 1 5 2 3 2 3 2
27 | 1 3 7 3 1 2
28 | 1 6 2 5 1 1 4 1 1 1 1
29 | 1 1 2 2 3 2 1
30 | 3 2 2 1 5 1 1 1 1
---+-------------------------------------------------------------------------
Apr|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14UT
Apr|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23LT
2000
Daily rate of long echoes (duration > 20 s)
2000
Apr 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
--------------------------------------------------------------------
Count 0 1 2 0 1 1 1 2 1 1 0 2 2 5 1 0
Apr 17 18 19 20 21 22 23 24 25 26 27 28 29 30
------------------------------------------------------------
Count 1 0 1 0 4 10 12 1 2 4 5 4 1 1
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.
LT = local time = JST = UT + 9 hours
Sadao Okamoto
---------------------------------------------------------------------------
Observer: Ton Schoenmaker
Location: Roden, Netherlands (06 26' E, 53 08' N)
Frequency: 55.275 MHz
Transmitter: Spanish TV channel E3 (video); transmitters in La Muela (30 kW),
Gamoniteiro (50 kW) and Aitana (60 kW); all stations within
100 Hz of nominal frequency; distance 1650 km
Antenna: 4-element horizontal Yagi, geographical azimuth 195 degrees
(SSW),
elevation 15 degrees
Receiver: Yupiteru MVT-9000 in FM mode; sensitivity 0.5 uV at 12 dB S/N
Observing: audio signal from ear-phone socket was rectified, digitized
and fed into a PC via the parallel computer port. HP VEE was used
to process the digitized signal and to store 15-minutes counts of
reflections stronger than 0.06uV.
Sporadics in January - April 2000
Uncorrected hourly counts for signals stronger than 0.06 uV
| 29 30 31 1 4 5 6 19 20 26 27 19 20 7 8 9 21 22
UT |Jan Jan Jan Feb Feb Feb Feb Feb Feb Feb Feb Mar Mar Apr Apr Apr Apr Apr
----+-----------------------------------------------------------------------
00h| - 73 100 86 - 52 43 - 99 - 96 - 93 - 102 86 - 132
01 | - 108 111 94 - 71 58 - 126 - 141 - 71 - 134 133 - 125
02 | - 146 140 113 - 92 91 - 161 - 170 - 74 - 158 119 - 139
03 | - 184 138 125 - 118 93 - 187 - 218 - 113 - 147 152 - 110
04 | - 166 199 134 - 129 128 - 198 - 230 - 105 - 165 173 - 171
05 | - 155 113 137 - 90 124 - 170 - 158 - 88 - 144 168 - 125
06 | - 115 130 137 - 85 76 - 139 - 176 - 71 - 179 178 - 176
07 | - 125 97 169 - 94 91 - 128 - 145 - 94 - 119 187 - 144
08 | - 130 120 311 - 84 121 - 114 - 169 - 141 - 155 259 - 111
09 | - 133 130 139 - 78 115 - 180 - 166 - 157 - 157 220 - -
10 | - 113 96 112 - 76 118 - 147 - - - 172 - 193 180 - -
11 | - 110 100 128 - 79 86 - 141 - - - 122 - 160 127 - -
12 | - 67 94 119 - 73 76 - 115 - - 96 137 - 151 156 - -
13 | - 64 58 85 - 50 76 - 122 - 82 99 116 - 153 148 - -
14 | - - 53 79 - 44 48 - 74 105 90 63 75 - 145 160 - -
15 | - - 33 84 - 31 69 - 60 73 88 62 114 - 109 102 - -
16 | - 41 58 65 - 45 69 35 58 50 54 44 66 - 58 70 - -
17 | - 19 39 87 - 27 50 51 22 64 44 29 98 - 49 60 20 -
18 | - 23 27 41 - 55 17 41 - - - 30 29 - 51 36 16 -
19 | - 19 - 54 - - 27 53 - - - 27 100 - 37 36 28 -
20 | - 54 - - - - 31 62 - 49 - 45 - 42 61 - 28 -
21 | - 63 - - - 31 - 67 - 74 - 108 - 66 50 - 43 -
22 | 63 84 63 - 32 49 - 85 - 86 - 70 - 76 77 - 66 -
23 | 62 98 40 - 53 41 - 103 - 116 - 47 - 92 87 - 99 -
----+-----------------------------------------------------------------------
| 29 30 31 01 04 05 06 19 20 26 27 19 20 07 08 09 21 22
UT |Jan Jan Jan Feb Feb Feb Feb Feb Feb Feb Feb Mar Mar Apr Apr Apr Apr Apr
Ton Schoenmaker
---------------------------------------------------------------------------
Observer: Pierre Terrier
Location: Canet, France (3 36'E, 43 41' N)
Frequencies: 93.8 MHz
Transmitter Location:
93.8 France Musique Eyne (66) public service
93.8 France Musique Osseja (66) public service
93.8 France Culture Port Vendres (66) public service
93.8 France Musique Font-Romeu (66) public service
93.8 BFM Marseille (13)
Antenna: 6-element Yagi FM, horizontal polar.
azimuth 0 deg (N-S), elevation 90 deg. (zenith)
Pre-amplifier: home made, gain 15 dB, Nf < 2 dB
Receiver: Tuner FM Continental Edison digital synthesiser TU 9945
Observing method: Electronic interface on LINE output audio signal are fed in
COM1: of PC IBM 386 25 MHz.
METEOR v 4.0 test version processes the signal and records on
hard disk the time of the events.
METEOR parameters: THRESHOLD = 16
| Apr 2000
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+-------------------------------------------------------------------------
0h| 16 12 17 11 4 7 5 1 4 17 15 6 5 9 14
1 | 19 10 24 16 4 4 6 6 7 17 11 6 5 3 6
2 | 11 13 10 13 4 3 2 7 7 15 18 11 10 1 7
3 | 11 9 7 5 6 7 5 1 7 19 23 12 10 11 9
4 | 18 14 11 6 6 7 2 8 6 15 21 13 9 7 13
5 | 23 7 14 12 13 7 4 7 6 9 17 7 11 8 4
6 | 19 8 17 17 10 15 6 8 12 12 17 10 10 12 9
7 | 20 9 20 11 30 13 6 37 10 11 19 6 16 10 18
8 | 30 22 17 8 26 18 5 9 8 21 11 10 16 12 20
9 | 31 11 8 11 10 12 15 1 21 13 10 17 15 9 14
10 | 32 13 10 20 6 11 16 10 9 19 16 8 14 5 13
11 | 20 9 13 9 9 18 17 6 7 13 9 10 12 7 12
12 | 9 7 14 12 12 7 10 2 12 12 8 9 11 7 10
13 | 12 5 18 4 6 7 10 1 9 8 16 9 13 7 13
14 | 14 8 12 2 4 4 8 3 11 8 12 10 10 11 2
15 | 1 8 48 19 5 1 10 3 3 6 4 7 10 6 5
16 | 5 4 4 5 1 5 1 5 4 2 4 6 7 3 2
17 | 8 8 4 4 1 5 3 4 3 1 2 1 0 2 5
18 | 8 6 3 2 5 21 3 3 5 2 3 2 3 0 2
19 | 10 3 8 6 4 1 4 2 1 5 4 3 3 5 1
20 | 10 5 4 6 1 1 2 2 3 8 10 3 6 2 0
21 | 7 15 16 1 2 3 3 3 18 4 10 3 7 4 2
22 | 6 9 11 1 1 2 5 1 10 14 6 6 9 7 4
23 | 7 13 13 2 3 5 5 2 11 4 9 5 6 5 0
---+-------------------------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Apr 2000
| Apr 2000
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+-------------------------------------------------------------------------
0 | 5 7 7 9 8 7 9 8 15 9 7 2 6 9 4
1 | 6 15 11 6 2 11 7 3 13 8 6 5 11 6 6
2 | 2 13 16 6 3 9 4 8 23 4 14 2 8 8 9
3 | 4 17 13 8 5 17 5 8 17 4 2 0 10 10 18
4 | 3 25 15 6 2 12 3 19 17 20 8 3 12 9 10
5 | 7 14 13 11 4 10 4 13 18 5 11 9 16 17 14
6 | 9 20 11 18 3 7 11 22 13 9 16 18 21 15 14
7 | 11 22 15 20 10 6 12 17 25 7 9 8 17 17 16
8 | 2 23 19 19 13 7 14 9 18 13 12 15 12 13 16
9 | 7 19 10 8 18 6 11 16 20 12 12 13 21 13 21
10 | 9 28 12 20 15 19 5 9 16 12 8 10 17 15 9
11 | 11 21 22 13 11 13 12 7 12 13 5 10 14 10 6
12 | 4 18 22 9 9 5 7 10 14 20 7 11 14 11 7
13 | 3 13 42 9 5 9 3 12 10 10 6 6 11 16 6
14 | 2 10 9 7 10 4 4 7 8 6 5 3 14 5 10
15 | 5 6 6 7 10 4 1 2 8 9 3 5 8 7 7
16 | 3 2 6 8 6 24 3 3 2 2 3 3 7 1 6
17 | 8 5 4 2 2 11 0 2 3 2 2 6 10 1 13
18 | 3 1 3 3 3 6 0 4 4 2 2 7 1 1 12
19 | 7 4 5 5 3 1 2 3 14 1 0 4 7 3 18
20 | 6 4 4 3 4 3 8 14 3 2 4 5 9 5 15
21 | 6 2 4 4 3 6 4 14 9 8 1 4 6 1 27
22 | 10 8 9 3 6 2 5 12 16 5 3 9 5 3 23
23 | 5 12 8 7 4 9 7 14 9 7 3 4 5 5 13
---+-------------------------------------------------------------------------
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
| Apr 2000
Pierre Terrier
---------------------------------------------------------------------------
Observer: Garfield Tsao (BM2EQB)
Location: LonTan Observatory
LonTan, TauYan, Taiwan R.O.C. (121 14'37" E, 24 52'54" N by GPS)
Frequency: 50.0169 MHz USB mode 3 kHz width.
Antenna: Comet made 50 MHz Yagi HB 4 element (gain 10.3 dBi)
astronomical azimuth 225 deg (=NE), elevation 7 deg.
Transmitter: MIYAZAKI University Japan, USB mode, 50 W (24 hours),
distance about 1125 km from Lon Tan.
Receiver: Icon PCR-1000 computer controlled all band receiver
Sensitivity: 0.25 uV for 10 dB S/N for USB mode
Observing method: the beacon 880 Hz voice signal (by FFTDSP) is
received by a low frequency filter (880 Hz)and fed into
the D/A converter and computer in real time.
Data sampling system: using an 8 bits A/D card to PC/AT and Qbasic program
with 1/8 second sampling interval to store the> 1.0 s reflections.
April 2000: Lyrids
2000|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23LT
Apr|16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15UT
----+-------------------------------------------------------------------------
21 | - - - - - - - - - - - - - - - - - - - - - - - E
22 |27 43 48 64 50 56 71101 91 60 58 44 28 35 33 36 19 24 29 38 43 53 62 E
23 |50 49 69 61 66 80 91 84 81 54 53 50 29 25 - - - - - - - - - -
Notes:
. "E" symbol means weak E layer
. "N" symbol means background noise affected the normal echoes
Garfield Tsao
---------------------------------------------------------------------------
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).
Lyrids 2000
Meteor counts in one hour intervals starting at:
UT | 21 Apr 22 Apr 23 Apr 24 Apr
----+----------------------------------
0h | 177 403 189 128
1 | 211 298 230 172
2 | 201 375 220 172
3 | 218 341 241 179
4 | 231 398 274 129
5 | 304 453 274 230
6 | 308 458 247 304
7 | 426 475 257 348
8 | 338 478 290 315
9 | 300 379 270 306
10 | 290 454 258 267
11 | 259 231 192 236
12 | 204 244 231
13 | 204 179 146
14 | 148 129 75
15 | 128 131 80 90
16 | 127 111 76 122
17 | 230 104 80 125
18 | 273 120 38 192
19 | 185 115 48 153
20 | 209 116 64 211
21 | 307 159 121 151
22 | 349 164 143 158
23 | 508 184 144 143
----+----------------------------------
UT | 21 Apr 22 Apr 23 Apr 24 Apr
Note: Aurora on April 24, 12h-15h UT
Ilkka Yrjola
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@retemail.es
http://personal3.iddeo.es/ea3btz (in Spanish)
Michael Boschat
6306 Cork St., Apt.512, Halifax, Nova Scotia, Canada
E-mail: andromed@atm.daldot ca
Maurice De Meyere (ON4NU)
Hullekensstraat 24, B-9831 Deurle, Belgium
tel: +32 (9) 282 35 26
E-mail: mauricedot demeyere@planetinternetdot be
Didier Favre
Association Astronomie Tycho Brahe & Club d'astronomie Thorens-d'Etoiles
Annecy, France
E-mail: tbrahe@cybercable.tm.fr
http://www.astroclubdot net/tychobrahe
http://favre.didier.free.fr/indexie.htm
Ghent University, Astronomical Observatory
Krijgslaan 281(S9), B-9000 Gent, Belgium
E-mail contact: Paul@izar.rug.acdot be, Pierredot deGroote@rug.acdot be
Rafael Haag
Porto Alegre, Brazil
E-mail: haag@portoweb.com.br
Werfried Kuneth
Ferndorf, Austria
E-mail: ku@aon.at
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
John R. Meyer
Van Andel Creation Research Center, Chino Valley, AZ. USA
E-mail: crsvarc@primenet.com
R.B. Minton
Astrometric Observatory
568 North First Street, Raton, NM 87740, USA
tel: +001 (505) 445 7009
Chris Steyaert, VVS
Kruisven 66, B-2400 Mol, Belgium
tel: +32 (14) 31 51 04
E-mail: steyaert@vvsdot be
Compuserve: 72650,3513
Sadao Okamoto
E-mail: okamoto@jim.sugiyama-u.ac.jp
Ton Schoenmaker, Dutch Meteor Society
Meester Homanstraat 8, NL-9301 HP Roden, Netherlands
E-mail: schoenmaker@NFRAdot nl
Call: PA0EFA
Pierre Terrier
Canet (close to Montpellier), France
E-mail: pierre.terrier@wanadoo.fr
http://members.tripod.com/~astro_electronic/index.html
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
Kouterstraat 25, B-9750 Zingem, Belgium
tel: +32 (9) 384 04 12
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 (RMOB0004) 8 May 2000
--
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