[Prev][Next][Index][Thread]
(meteorobs) Radio Meteor Obs. Bull. Sep 1998
Radio Meteor Observation Bulletin No. 62 October 1998
1. FORWARD SCATTER METEOR OBSERVATIONS
Observer: Enric Fraile Algeciras
Location: Barcelona, Spain (01 59' E, 41 21' N)
Frequency: 48.250 MHz
Transmitter location: most likely Czech television C2 C. Budejovica,
100 kW, horizontal polarisation.
Antenna: 6-element Yagi 617-6B, 14 dBd gain.
astronomical azimuth 215 deg (=NE), elevation 0 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 (100 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 9 second/18 sampling interval to
store all the > 1.0 s signal increases.
| Sep 1998
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----+------------------------------------------------------------
0 | 11 10 10 10 13 17 2 1 1 2 4 11 11 10
1 | 7 15 7 8 13 13 5 1 2 1 2 12 14 9
2 | 3 9 11 12 10 7 10 2 1 2 16 9 12
3 | 8 13 12 15 11 7 3 4 3 1 2 15 15 13
4 | 16 11 15 11 20 12 18 5 5 3 4 10 14 15
5 | 4 23 15 12 17 14 10 4 4 1 2 3 13 21 19
6 | 7 12 32 24 22 17 15 4 4 2 1 5 15 21 20
7 | 15 15 13 10 10 14 9 5 5 1 2 5 12 22 18
8 | 19 11 11 23 13 15 6 10 8 6 3 1 24 25 26
9 | 16 34 10 20 20 11 7 11 10 3 2 9 16 21
10 | 4 20 13 14 6 7 22 7 7 2 1 7 6 8 13
11 | 5 6 8 6 11 16 7 4 2 1 9 10 10 6
12 | 8 8 25 9 15 31 3 4 2 1 4 7 12 4
13 | 6 9 9 5 7 4 8 3 5 16 13 12
14 | 1 11 6 9 5 7 8 1 4 10 14 5
15 | 8 6 13 14 1 8 2 4 2 3 6 5 13 16 15
16 | 5 9 6 11 10 14 1 1 5 8 12 15 6
17 | 5 3 4 6 4 4 17 11 5 12
18 | 13 4 25 3 2 5 7 38 4
19 | 8 7 23 8 6 15 4 8 24 6
20 | 12 9 8 24 7 3 1 1 9 18 60 5
21 | 7 18 16 4 25 3 6 1 1 22 8 10 13
22 | 24 19 14 8 26 3 5 2 11 14 21 19
23 | 14 14 15 11 18 2 2 3 13 13 16 15
----+------------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Sep 1998
| Sep 1998
UT | 16 17 18 19 20
----+--------------------
0 | 12 9 5 6 10
1 | 6 17 10 9 9
2 | 9 12 9 5 3
3 | 11 9 5 9 4
4 | 26 5 8 11 6
5 | 16 27 11 8 6
6 | 21 13 10 5 13
7 | 10 11 10 14 7
8 | 11 19 6 10 23
9 | 17 16 18 9
10 | 23 15 13 20
11 | 26 12 7 14
12 | 7 7 7 22
13 | 6 3 4 4
14 | 6 11 7 7
15 | 8 8 10 6
16 | 4 10 14 4
17 | 14 10 12 4
18 | 9 7 7 7
19 | 5 5 4 3
20 | 6 8 3 8
21 | 16 9 9 9
22 | 9 17 1 8
23 | 7 17 7 7
----+--------------------
UT | 16 17 18 19 20
| Sep 1998
Notes:
. on September 20 I started to dismantle the Radio Meteor Observatory of
the actual location. I am constructing the new observatory in the Salle
University of Barcelona.
My idea is to start with the new system the first of November to
participate in the LEONIDS campaign.
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 1998
Number of meteors heard in one hour interval
| UT
Sep | 09h 10 11 12 13 14 15 16 17
----+-----------------------------------
01 | - - - 6 4 - - - -
02 | - - - - - - - - -
03 | - - - - - - - - -
04 | - - - - 5 10 6 - -
05 | - - - - - - - - -
06 | - 5 1 - - - - - -
07 | - - 7 20 13 17 21 5 -
08 | - - 22 28 44 66 57 22 15
09 | - - 4 4 12 1 - - -
10 | - 1 14 22 44 51 - - -
11 | - 22 41 23I I 52 21 24 17
12 | - - - - 7 9 6 - -
|
17 | - - 15 29 34 24 15 - -
18 | - 25 27 35 21 20 - - -
19 | - 12 7 4 10 13 - - -
20 | - - - 5 4 - - - -
21 | - 19 30 36 15 - - - -
22 | - - 3 0 5 18 36 24 -
23 | - - 20 24 13 9 - - -
|
30 | - - - - 5 - - - -
31 | - - - - - - - - -
----+-----------------------------------
Sep | 09h 10 11 12 13 14 15 16 17
| UT
Notes:
. no corrections for radiant position made to the counts.
. ( - ) means no observations made.
. Active showers: Alpha Aurigids maximum on Sep. 1
Delta Aurigids Sep. 8
Aries-Triangulids Sep.12 or 13
Piscids Sep.20
Sextantids Sep.27 - radio shower
. I= 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, 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 1998
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Sep |
1998 | 20h 21 22 23 00 01 02 03 04 05 06
------+------------------------------------------------------
1- 2 | 86 46 53 70 68 78 98 95 78 75 34
2- 3 | 29 50 45 52 59 72 85 134 86 101 61
3- 4 | 23 29 23 53 47 45 135 120 93 129 71
4- 5 | 33 40 49 19 35 60 91 78 146 71 61
5- 6 | 52 46 35 42 76 57 69 98 87 82 70
6- 7 | 23 47 43 64 52 81 71 84 76 68 79
7- 8 | %
8- 9 | 26 45 50 69 47 66 92 89 73 87 54
9-10 |
10-11 | 13 17 43 41 48 59 84 90 86 87 83
11-12 | 17 27 66 42 46 60 166 85 77 83 71
12-13 | 17 26 25 46 61 70 95 102 125 90 63
13-14 | 27 5 18 37 33 36 33 71 64 39 81
14-15 | 14 13 25 31 46 36 54 77 79 56 78
15-16 | 17 20 32 47 38 57 107 102 106 90 91
16-17 | 15 15 31 47 42 49 73 77 80 80 125?
17-18 |
18-19 | 13 30 39 71 74 52 102 88 121 92 85
19-20 | 71? 23 ? ? 63 47 69 130 98 106 89
20-21 | 24 31 104 94 76 64 97 92 123 134? 97
21-22 | 39 48 53 92 ? 76 99 138 133? ? 92
22-23 | 29 47 76 66 61 82 113 120 80 110 81
|
26-27 | 39 19 25 41 82 48 57 99 111 95 73
27-28 | 16 50 33 51 68 56 87 121 91 91 65
28-29 | 22 41 63 68 67 79 109 108 100 123 111
29-30 | 45 49 48 66 63 82 74 123 94 90 109
30- 1 | 37 39 61 64 68 85 92 117 121 143 94
------+------------------------------------------------------
1998 | 20h 21 22 23 00 01 02 03 04 05 06
Sep |
Raw counts of reflections with a duration of at least 1.000 s
during one hour interval starting at UT:
Sep |
1998 | 20h 21 22 23 00 01 02 03 04 05 06
------+------------------------------------------------------
1- 2 | 38* 5 9 8 8 5 15 6 18* 16* 6
2- 3 | 3 3 6 5 4 8 8 17 8 14 9
3- 4 | 4 2 2 10 3 6 38* 23 28* 53* 21*
4- 5 | 6 5 7 2 5 3 8 8 24 9 10
5- 6 | 26* 13* 6 6 2 8 6 13 8 8 10
6- 7 | 5* 5 8 12 6 13 11 9 12 9 18*
7- 8 | %
8- 9 | 5 5 8 12 1 7 14 10 8 6 4
9-10 |
10-11 | 1 3 8 4 4 4 8 12 15 12 6
11-12 | 0 7* 10 1 6 5 11 11 8 10 7
12-13 | 3 4 6* 7 10 9 19 17 24 14 14*
13-14 | 8* 0 1 4 7* 4 3 11 6 2 12*
14-15 | 1 2 2 4 2 3 3 12 8 4 13
15-16 | 5* 3 2 9 4 4 6 13 11 13 9
16-17 | 3 3 1 7 6 5 10 12 16 10 27?
17-18 |
18-19 | 4* 3 3 20* 12 7 19 7 23 20 9
19-20 | 29? 5* ? ? 15* 8 8 11 6 23* 10
20-21 | 4 5 39* 27* 11 7 10 10 26* 44? 17
21-22 | 8* 4 8 11 ? 8 10 15 35? ? 20*
22-23 | 6* 10* 27* 17* 9 12 12 7 7 24* 25*
|
26-27 | 14* 1 1 3 16 5 6 10 19 8 9
27-28 | 2 9 2 6 10 6 12 8 5 11 8
28-29 | 3 7 10 9 5 13 22* 12 11 18 8
29-30 | 7 7 8 10 6 7 11 20 7 20* 17
30- 1 | 15* 9* 4 13* 6 9 11 11 18 18 19*
------+------------------------------------------------------
1998 | 20h 21 22 23 00 01 02 03 04 05 06
Sep |
Notes:
. ? probably affected by sporadic-E, direct reception.
. local time = UT + 2 hours.
. * warning for relative high number of long duration reflections,
an indication for potential stream activity.
. % test with different antenna amplifier, not successful.
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.
-----------------------------------------------------------
| Sep 1998 | 10x % reflec. time | horiz: day | vert: time |
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 52 28 35 49 43 86 23 20 40 79 30 34 31 38 45
1 | 42 57 62 41 53 48 40 33 38 38 43 29 33 37 28
2 | 79 69 60 77 57 54 44 39 42 35 47 55 38 28 34
3 | 55 43 83 76 54 61 57 39 38 65 55 47 52 31 36
4 | 41 67 81 48 111 46 48 31 45 73 60 40 58 38 36
5 | 57 76 69 47 91 51 42 38 67 61 49 49 50 74 42
6 | 48 57 56 45 70 46 42 41 36 43 53 42 92 48 79
7 | 44 24 35 34 54 55 23 56 31 43 59 38 33 20 77
8 | 44 39 27 44 60 97 18 30 40 20 36 33 53 42 33
9 | 57 22 17 23 62 38 25 29 27 35 31 36 44 30 43
10 | 50 34 21 24 43 36 42 19 70 47 29 38 51 24
11 | 19 20 19 15 40 17 32 18 18 109 44 43 24 18
12 | 28 23 19 18 46 12 9 38 19 24 25 22 8 19
13 | 12 9 12 12 38 21 13 28 14 7 17 31 10 12
14 | 16 12 11 11 31 15 27 5 14 7 9 14 13 9 6
15 | 10 22 9 12 14 18 10 9 17 10 9 40 12 6 16
16 | 12 13 18 11 28 8 11 18 17 9 12 23 12 12
17 | 8 12 22 12 11 22 10 8 25 5 7 8 11 38
18 | 13 13 10 22 67 10 10 7 21 15 13 19 13 11
19 | 16 18 20 18 33 17 38 11 18 18 13 14 15 18 15
20 | 26 27 36 20 27 28 19 73 15 39 22 25 23 19
21 | 27 22 25 27 33 32 10 15 23 15 18 13 23 22 31
22 | 35 35 25 28 25 22 17 14 28 20 35 22 26 21 26
23 | 48 30 30 28 31 28 15 26 35 32 36 26 32 23 22
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------------------------------------------------
| Sep 1998 | 10x % reflec. time | horiz: day | vert: time |
----------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+------------------------------------------------------------
0 | 37 23 26 41 44 50 44 45 31 35 41 58 39 51
1 | 33 32 28 37 42 41 41 25 37 30 33 34 26 42
2 | 53 45 26 50 39 29 52 29 43 30 38 46 34 39
3 | 57 36 30 29 73 37 56 43 38 35 60 39 21 47
4 | 73 51 35 56 48 42 48 46 47 41 52 72 50 43
5 | 42 35 51 111 64 58 90 57 57 43 82 57 54 64
6 | 66 96 40 66 43 48 85 50 49 30 71 42 67 41
7 | 38 28 69 68 70 35 26 45 64 43 86 48 0 28 36
8 | 25 39 28 44 51 31 24 23 50 13 62 61 33 29 46
9 | 18 26 44 37 43 33 13 24 20 30 60 66 21 33 15
10 | 24 16 33 43 41 15 16 20 23 14 44 53 27 21 22
11 | 31 20 30 30 46 16 11 11 27 24 28 37 17 30 12
12 | 14 21 24 27 7 9 13 11 10 38 32 10 54 17
13 | 6 8 15 27 16 11 5 9 6 35 36 4 11 6
14 | 18 9 7 14 16 4 12 7 4 5 26 21 7 6 5
15 | 10 13 13 9 10 12 9 5 7 14 11 14 10 10 7
16 | 24 22 14 9 7 14 10 29 10 12 8 16 8 17 13
17 | 24 14 15 8 10 18 11 8 13 7 11 8 9 8 17
18 | 8 13 20 11 11 12 14 13 17 28 15 12 14 25 15
19 | 30 19 23 10 23 14 24 15 14 17 25 19 16 24 14
20 | 21 18 27 34 29 25 21 22 16 29 47 33 28 39 25
21 | 27 19 27 17 25 25 23 29 23 23 29 22 19 19 21
22 | 25 30 19 17 29 19 30 16 23 26 25 26 21 25 17
23 | 30 24 22 16 36 29 26 18 22 33 23 35 28 20 14
---+------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Notes:
. apart from some activity (Aurigids) during the beginning of the month
and an increase towards to end, this was a quiet month.
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
_____________________________________________________________________
September
1998 hr-UT X-Dense B-Dense C-Dense ESA INT Total
---------------------------------------------------------------------
1AUR 1100-1200 7-2-4 10-8-11 48 None 42
2 " " " 1-0-0 5-3-3 8-6-7 42 " 33
3 " " " 0-0-2 2-3-5 4-8-11 54 " 35
4 " " " 0-0-1 3-4-9 10-16-13 54 " 56
5AUR 1330-1430 0-1-0 4-4-3 6-12-8 50 Lo 38
6 1100-1200 2-0-3 4-3-2 29 None 14
7GAU 0900-1000 0-1-0 1-2-3 8-10-9 50 " 34
8 " 0900-1000 1-3-3 1-8-7 44 Lo 23
9GAU 0930-1030 2-2-5 4-2-5 65 Lo 20
10** 1300-1400 1-4-4 5-3-3 70 Lo 20
11** 1300-1400 0-1-0 3-6-6 9-13-7 47 None 45
12** 1300-1400 6-6-6 11-8-5 50 " 42
13** 1300-1400 4-4-5 10-7-6 58 " 36
14** 0700-0800 5-3-1 6-6-6 48 " 27
14** 1300-1400 3-4-4 1-5-8 68 None 25
15SPI 1130-1230 6-3-5 8-9-13 43 " 44
16 " " " 2-0-1 4-5-4 8-11-15 50 " 50
17 " " " 1-0-0 8-7-5 9-11-10 45 " 51
18 " " " 4-3-4 5-3-8 33 None 27
19 " 1100-1200 3-4-0 3-4-4 44 None 18
20SPI " " Hi 3
21 " " 0-1-0 4-1-2 25 Med 8
22SPO 1400-1500 0-1-0 1-3-3 5-2-2 47 None 17
23 " " " 2-1-1 1-3-2 60 Med 10
24*** 0930-1030 Hi 4
25DAU 1000-1100 0-0-1 4-4-9 8-12-7 44 None 45
26 " " " 0-2-3 4-4-6 42 Med 19
27 " " " 2-6-3 4-9-6 27 None 30
28 " 0940-1040 5-3-3 7-6-6 37 " 30
29 " " " 0-3-1 5-6-4 37 " 19
30 " 0920-1020 5-2-6 5-12-8 37 None 38
---------------------------------------------------------------------
1998 hr-UT X-Dense B-Dense C-Dense ESA INT Total
September
Notes:
. activity period of streams with radiant at 45 deg. elevation:
AUR: Alpha Aurigids Area
GAU: Gamma Aurigids Area
** : Aries-Triangulids Area
SPI: Southern Piscids Area
***: Gamma Piscids Area
DAU: Delta Aurigids Area
SPO: Sporadics
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 53.76060 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, sporadic-E, E-layer
and FAI propagation 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 3.5 seconds
| Sep 1998
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+-----------------------------------------------------------
0| 11 9 6 16 19 14 7 11 15 17 8 22 14 21
1| 15 10 18 16 20 14 19 21 21 16 19 18 11 19
2| 10 14 21 18 17 13 15 15 20 12 20 22 18 20
3| 14 12 22 17 19 16 11 13 17 17 17 16 12 21
4| 15 24 9 13 19 8 20 17 16 11 12 12 17 18. 23
5| 17 29 10. 16 28 17 12 18 16 16 10 13 19 12 23
6| 12 21 12 7 14 11 24. 19 10 12 16 16 28 26
7| 10 23 8 17 18 21 17 18 15 8 11 22 23 26
8| 20 23 16 15 13 14 13 15 22 14 17 10 12. 28 26
9| 16 12 12 12. 7 15. 19 17 16 17 13 12 14 31
10| 11 11 17 9. 22 10 12 10. 17 3 13 10 15 21
11| 18 13 13 12 12 10 8 18 14 9 12 8 11. 21 22
12| 8 4 6 19 13. 19 13 13 11. 19 15 11. 11 15 15
13| 5 8 10 10 10. 8 11 9 10 21 9 9 9 16 11
14| 11 12 7 6 9 5 7 7 5 10 13 11 11 14
15| 7 4 7 7 4 4 3. 11 5 11 9. 3 9 4
16| 3 4 7 4 3. 3 3 9 9 1 7. 4 4
17| 0. 0 10 5 3 1 5 13. 15 5 9. 9. 7
18| 6. 5 0. 2 16. 5 5 7 2 7. 7 2
19| 5. 2 6 7 10 3 8 3. 6 8 7 8 11. 8 13
20| 4. 7 3 6 7 15. 7 7 4 4 13 9
21| 5 7 10 6 14 2. 7 7 4 9 5 15 11
22| 12 6 8 13 7 8 4 9 7 10 11 19 20 17
23| 8 13 7 8 12 9 8 10 14 8 3 12 23 13
---+-----------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Sep 1998
| Sep 1998
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
---+-----------------------------------------------------------
0| 8 17 11 14 23 5 9 12 5 4 10 4 12 16
1| 23 21. 12 17 13 11 10 6 5 13 12 20 20 9
2| 10 10 26 14 7 7 5 7 7 12 16 27 14
3| 23 12 22 22 14 8 9 5 13 6 12 14 12
4| 19 12 11 21 20 13 9 10. 13 13 11 14 16
5| 16 24 13 29 14 12 10 14 13 17 18 18 32 13
6| 18 17 16 20 19 19 27 14 23 14 24 12 24 20
7| 17 24 19 21 29 17 27 20 17 22 30 18 12 20
8| 19 13 19 11 18 12 18 19 11 19 15 19 22
9| 21 12 20. 25 15 21 15 15 21 25 21 8 12 28 14
10| 31 21 6 26 13 13 13 18 19 19 20 5. 18 19 15
11| 23 18 10 16 24 14 14 20 20 24 9 17 21 18
12| 28. 19 14 17 31 29 23 29 30 9 12 19 19
13| 17 10 7 21 20 10. 13. 32 11 12 13 13
14| 12 10 19 12 13 8 19 10 3 8
15| 4 7 5 9 17 13. 12 23 22 6. 12 5 8
16| 10 7 2 2 11 14 13 13 7 1 7 3 5
17| 8 6 4 5. 17 15. 11 15 15 9 5 4 3
18| 4 3 4 4 6 6 6 8 4 1 8 6 4
19| 13 10 6 4 6 4 6 8 7 10 5 7 6
20| 9 12 8 8 3 5 4 5 2 14 10 6 4
21| 8 10 12 12 3 2 4 9 3 3 10 10 10 11
22| 15 12 12 6 1 7 2 1 6 10 5 9 12
23| 19 11 4. 15 10 2. 7 5 8 13 11 10 9 8
---+-----------------------------------------------------------
UT| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
| Sep 1998
Propagation overview for September 1998
E : sporadic-E or E-layer propagation
F : FAI (field aligned irregularity)
- : propagation only via meteor echoes.
| Sep 1998
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
---+------------------------------------------------------------
0| - E - - - - - - - - - - - - - - - - - - - F - - - - - - -
1| - - - - - - - - - F - - - - - - - - - - - - - - - - - - -
2| - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3| - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4| - - - - - - - - - - - - - - - - - - - - - - - - - - - -
5| - - E - - E - - - - - - - - - - - - - - - - - - - - - - -
6| - - - - - E - E - - - - - - - - - - - - - - - - - - - - -
7| - - - - - E - E - - - - - - - - - - - - - - - - - - - - -
8| - - - - - - - E - - - - - - - - - - - - - - - - - - - - - -
9| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
10| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
11| - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
12| - - - - - - - - E - - - - - - - - - - - - - - - - - - - -
13| - - - - - - - - - - - - - - - - - - - - - - E - - - - - -
14| - - - - - - - - - - - - - - - - - - - - - - - - - - -
15| - - - - - E - - - - - - - - - - - - - - - - - E - - - - -
16| - - - - - E - - - - - - - - - - - - - - - - - - - - -
17| - - - - - - - - - - - F - - - - - - - - - - - - - -
18| F - - - E - - - - - F - E - - - - - - - - - - - - - -
19| E - - - F - - F - - - F - F F - - - - - - - - - - - - -
20| F - - - F - F E - - - - - - - - - - - - - - - - - - -
21| - E - - - - F - - - - - - - - - - - - - - - - E - - - -
22| - E - - - - F - - - - - - - - - - - - - - - - E - - - -
23| - - - - - - - - - - - - - - - - - - - - F - - - E - - - -
---+------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930
| Sep 1998
Notes:
. nothing special during September 98, just low meteor rates.
. local time conversion: 2 hour ahead of UT (04h00 UTC is 06h00 local)
Werfried Kuneth
---------------------------------------------------------------------------
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
1998
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
---+---------------------------------------------------------------------------
01| 44 51 51 58 48 63 57 46 27 27@14 26 24 24 13 22 13 16 10 11 23 28 40@52
02| 51 49 46 54 53 50 47 46 42 43@36 15 24 27 18 27 13 13 14 13 25 34 28@42
03| 42 48 48 69 48 52 47 37 30 29 28 30 23 21 22 23 17 10 11 17 19 36 41@44
04| 49 37 65 66 54 62 67 49 38 25 24 21 25 23 21 18 27 14 11 16 21 45 32@44
05| 42 38 52 50 53 55 43 42 35 22 15 21 32 22 18 14 25 17 18 17 33 43 38@36
06| 38 52 69 44 41 53 49 53 50 35 20 23@22 29 24 18@34 e@13 18 26 31 43 --
07| 43 54 70 65 61 60@55 e 49 28 32 34 23 26 28 20 20 21 16 19 20 36 30@48
08| 35 51 55 55 60 60 48 48 39 25@22 n 14 21 26 19 17 13 10 14 29 37 45@44
09| 49 45 59 70 53 51 51 45 41 21 19 12 19 19 15 15 15 10@15 15 30 28 37@36
10| 35 36 51 41 75 51 46 39 25 33 16 16 34 21 14 11 8 14 16 15 18 29 38@44
11| 26 34 59 51 56 59 61 32 36 12 24 26 21 31 24 15 16 13 14 12 21 31 29@38
12| 38 31 45 53 55 51 51 59 33 24 19 20 28 39 22 19@16@18 18 22 36 25 37 --
13| 41 47 40 46 57 73 53 41 40@26 25 18 19 23 27 10 11 19 20 21 22 35 46@49
14| 40 49 50 52 54 40 41 35 16@42 n n 21 19 27 17@12 19 9 13 19 43 42@36
15| 47 43 45 52 56 55 51 63 36 40 33 31 16 18 13 e n n n 24 28 40 36@40
16| 41 47 62 70 59 58 53 58 61 43 21@15 n 22 20 14 18@20 14 13 20 36 31@40
17| 45 45 65 59 55 58 61 42 41 n 41 25 25 20 27 15 28 17 23 17 28 30 39@43
18| 30 40 55 54 53 50 49 49 48 39 35 39 29 36 27 24 21 23 12 22 29 40 29@40
19| 48 51 77 52 53 52 56 55 50 30 26 29 32 40 25 22 24 18 20 15 24 33 33@21
20| 31 37 53 61 50 52 58@38 42@30 31@24 17 31 n n n@18@18 13 17 30 43 --
21| 44 48 50 60 58 69 55 49 45 46 20 30 27 38 24 27 e e@18 22 22 26 42@47
22| 35 40 53 57 57 52 48 48 53 28 26 31 22 28 25 f f f f f f f f f
|
27| f f f f f f f f f f f f f f f 15 18 8 10 9 19 38 39 --
28| 34 49 49 39 32 49 40 40 45 28 30 30 25 29 19 14 15@13 e 17@28 37 36@31
29| 34 40 28 35 41 40 44 45 30 46 27 39 32 35 23 14 e e e 15 19 38 40@38
30| 44 43 53 43 47 46 52 45 36 31 33 26 38 32 21 26 22 e 10 16 18 34 43@37
---+-------------------------------------------------------------------------
--
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
1998
Echoes with duration > 5 s
1998
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
---+---------------------------------------------------------------------------
01| 2 4 2 3 2 5 1 2 1 2 2 1 1
02| 2 1 6 3 4 2 7 4 6 7 1 1 2 1 1 1 1 1 1
03| 4 4 5 10 3 4 5 4 2 1 1 2 1 1 1 2 5 3
04| 4 4 2 8 3 3 1 2 2 3 1 1 1 1
05| 3 2 6 5 3 2 3 2 1 2 1 3 1 2 1 2 1 1
06| 3 1 5 4 3 2 3 4 5 2 1 1 1 3 1 --
07| 1 1 5 3 4 3 7 1 2 1 1 1 1 1 1 1 1 1 1
08| 3 2 2 3 2 4 5 4 1 1 4 1 2 1 1 1 2
09| 3 4 2 2 5 2 6 7 2 1 1 1 2 3
10| 2 1 7 1 2 2 1 4 2 1 1 2 3 1 1 2 1
11| 1 1 6 5 6 7 5 1 4 2 2 1 4 1 2 1 3 2
12| 2 5 4 2 3 2 2 2 1 1 1 1 1 3 2 1
13| 1 2 3 8 3 1 2 3 2 1 2 2 1 1 4 2
14| 2 5 5 4 4 3 3 2 2 1 1 6 2 2 1 3 1 2
15| 2 1 1 3 6 1 1 3 3 2 1 1 1 1 2 1 3
16| 1 2 3 7 4 3 2 2 3 3 2 1 1 1 1 1
17| 3 3 4 3 2 3 7 6 5 2 1 4
18| 3 2 4 3 4 4 9 4 1 3 1 1 1
19| 3 4 7 1 3 5 2 5 4 1 2 2 1 2 2 1
20| 2 2 5 3 2 3 6 1 1 1 3 1 2 1
21| 1 4 1 4 3 6 3 2 1 1 2 5 1 2 7
22| 3 1 1 2 3 3 4 5 5 3 4 f f f f f f f f f
|
27| f f f f f f f f f f f f f f f 1 1
28| 5 3 2 2 4 4 3 4 1 1 2 1 1 1
29| 1 3 2 4 1 5 1 1 1 1 1
30| 3 2 7 5 4 3 6 4 5 3 3 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
1998
Daily rate of long echoes (T > 20 s)
1998
Sep 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------------------------------------------------------
Count 1 6 6 3 2 3 5 5 1 6 3 2 0 7 1
Sep 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
-----------------------------------------------------------------
Count 4 5 8 2 2 3 (2) failure (0) 5 0 5
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.
e: contamination due to sporadic E opening.
f: no data available due to TX or RX failure.
Typhoon number 7 blew down my HRO antenna (Sep 22-27).
Sadao Okamoto
---------------------------------------------------------------------------
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.
Sep | UT
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
------+-------------------------------------------------+-----------
1 | 11 11 17 18 22 | 15.8
2 | |
3 | 10 29 21 17 16 18 16 15 28 22 26 19 | 18.5 21.0
4 | 13 15 19 9 18 10 19 17 14 13 11 9 | 14.0 13.8
5 | 12 11 16 14 16 15 16 17 12 16 22 20 | 14.0 17.2
6 | 14 14 13 14 14 26 19 27 28 26 27 18 | 15.8 24.2
7 | 7 13 18 12 19 11 19 21 21 19 31 24 | 13.3 22.5
8 | 12 11 8 14 15 20 14 17 23 13 15 20 | 13.3 17.0
9 | 9 11 21 20 16 16 16 13 29 21 | 15.3 18.5
10 | 5 21 11 12 11 17 24 18 16 24 22 19 | 12.8 20.5
11 | 8 12 10 19 16 19 22 16 23 15 30 19 | 14.0 20.8
12 | 10 11 10 12 18 15 24 15 | 10.5 15.7
13 | 13 9 14 7 9 13 8 10 18 13 12 | 10.8 12.2
14 | 10 7 11 11 14 16 18 | 11.5 18.0
15 | 7 12 19 16 11 16 15 12 14 21 13 10 | 13.5 14.2
16 | 10 12 18 17 13 13 16 20 16 19 20 20 | 13.8 18.5
17 | 12 10 14 13 17 22 19 24 12 23 21 24 | 14.7 20.5
18 | 14 14 17 12 17 16 15 20 16 16 18 | 14.8 16.8
19 | 17 14 18 14 16 9 18 15 11 16 13 18 | 14.7 15.2
20 | 7 11 10 13 12 13 24 13 22 19 21 26 | 11.0 20.8
21 | 10 19 23 7 19 19 19 32 31 31 22 19 | 16.2 25.7
22 | 8 20 16 14 18 17 16 19 21 | 15.5 18.7
23 | 15 23 20 23 15 20 31 40 20 24 | 20.3 25.0
24 | 14 14 19 15 14 17 13 19 16 22 26 23 | 15.5 19.8
25 | 5 21 14 11 22 17 18 20 16 17 34 21 | 15.0 21.0
26 | 7 12 13 20 10 12 15 26 27 19 30 22 | 12.3 23.2
27 | 15 17 15 14 27 20 20 31 32 32 | 18.0 28.8
28 | 12 13 13 14 20 17 12 17 21 31 25 18 | 14.8 20.7
29 | 18 19 17 21 19 15 17 18 20 20 20 26 | 18.2 20.2
30 | 14 19 11 10 18 18 15 27 21 32 36 32 | 15.0 27.2
------+-------------------------------------------------+-----------
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
Sep | UT
* (1) average hourly rate between 11h-17h UT
**(2) average hourly rate between 17h-23h UT
. local time = JST = UT + 9 hours
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).
Alpha Aurigids 1998
Meteor counts in one hour intervals starting at:
UT | 31 Aug 1 Sep 2 Sep 3 Sep
----+----------------------------------
0 | 255 142 23 76
1 | 255 99 17 62
2 | 221 157 31 49
3 | 203 172 59 100
4 | 256 233 95 96
5 | 449 309 13 42
6 | 201 168 17 81
7 | 187 212 19 38
8 | 315 136 32 87
9 | 208 80 84 114
10 | 145 152 59 81
11 | 77 70 73 64
12 | 145 67 99 42
13 | 149 68 92 107
14 | 79 90 40 69
15 | 81 42 66 59
16 | 61 52 39 37
17 | 43 14 34 56
18 | 56 40 36 86
19 | 92 22 47 63
20 | 127 30 50 68
21 | 107 43 36 104
22 | 145 42 69 126
23 | 156 34 51 79
----+----------------------------------
UT | 31 Aug 1 Sep 2 Sep 3 Sep
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)
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
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
Sadao Okamoto
E-mail: okamoto@jim.sugiyama-u.ac.jp
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
--
Christian Steyaert (RMOB9809) 10 October 1998
--