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(meteorobs) FWD: Radio Meteor Obs. Bull. Feb 1998
Radio Meteor Observation Bulletin No. 55 March 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.
| Feb 1998
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 24 13 10 15 13 10 9 18 15 11 16 18 22 12 10
1 | 19 29 1* 14 12 16 14 12 9 15 18 12 19 9 18
2 | 25 19 1* 29 16 16 16 23 21 16 24 20 16 33 27
3 | 37 20 2* 38 28 23 18 14 19 37 34 28 32 29 33
4 | 52 29 40 41 33 25 34 26 26 46 39 40 35 31 43
5 | 56 44 46 50 46 41 58 38 32 31 31 40 37 31 27
6 | 41 39 31 30 45 46 47 35 30 33 36 34 33 37 38
7 | 36 29 29 29 39 45 32 27 21 22 35 33 41 25 46
8 | 38 38 33 27 28 37 27 30 33 26 40 39 29 33 44
9 | 56 61 50 48 61 30 35 35 28 24 38 27 48 44 38
10 | 55 69 54 46 59 45 39 36 35 36 44 42 45 33 43
11 | 45 50 40 46 52 48 38 63 26 20 52 35 47 44 48
12 | 27 44 36 36 42 54 47 39 33 37 43 37 42 35 36
13 | 30 27 32 42 38 38 36 39 28 37 56 47 30 35 45
14 | 31 40 35 38 40 37 46 53 38 34 32 53 43 35 35
15 | 37 29 22 27 50 32 37 39 27 32 25 38 52 36 27
16 | 21 19 27 11 30 35 44 38 22 37 22 31 32 27 13
17 | 22 28 17 14 25 28 24 38 16 15 24 24 26 19 8
18 | 19 15 17 16 17 23 17 19 12 12 23 14 17 13 19
19 | 9 14 18 15 14 15 25 19 27 10 20 14 20 17 24
20 | 20 14 12 17 14 10 14 13 12 17 21 17 21 15 15
21 | 22 18 14 23 18 17 14 18 11 17 22 20 19 10 28
22 | 24 16 17 15 18 13 14 21 18 13 9 27 21 19 16
23 | 16 20 22 27 20 8 28 22 11 25 21 20 14 17 34
---+------------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Feb 1998
| Feb 1998
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28
---+----------------------------------------------------
0 | 13 14 12 16 17 19 17 20 16 20 21 17 20
1 | 24 23 18 8 16 8 6 26 21 11 15 21 9
2 | 20 17 12 13 7 7 9 21 26 25 18 22 11
3 | 26 21 30 25 13 6 13 15 31 28 21 19 18
4 | 47 31 33 14 22 22 9 44 41 47 30 24 32
5 | 34 34 45 28 35 29 25 42 32 48 38 36 34
6 | 26 33 37 28 28 27 35 53 36 46 43 37 41
7 | 26 28 34 30 21 24 22 36 34 36 31 34 40
8 | 40 31 36 31 39 26 25 44 44 34 39 37 31
9 | 47 42 43 27 33 34 32 52 39 38 43 47 28
10 | 54 44 45 38 43 45 36 48 48 33 61 43 43
11 | 48 36 35 33 49 34 35 33 40 39 44 45 53
12 | 33 25 40 28 36 30 37 37 31 30 31 33 25
13 | 40 35 36 37 34 49 47 46 33 34 29 34 19
14 | 46 25 39 20 29 33 24 64 38 44 37 41 36
15 | 24 35 47 30 42 41 23 32 38 38 36 45 33
16 | 25 21 20 23 28 23 30 21 30 22 30 25 29
17 | 21 25 25 23 20 17 12 21 24 19 16 18 19
18 | 16 15 14 16 14 22 13 23 12 14 24 19 16
19 | 18 18 15 10 13 13 16 18 19 19 13 9 16
20 | 10 16 15 9 14 10 16 15 15 21 24 11 16
21 | 12 13 26 15 25 14 12 16 10 20 15 20 10
22 | 14 14 16 11 26 17 10 16 15 25 15 25 22
23 | 12 12 15 20 20 26 20 15 19 32 19 15 18
---+----------------------------------------------------
UT | 16 17 18 19 20 21 22 23 24 25 26 27 28
| Feb 1998
Notes:
. ? probably affected by sporadic-E, direct reception.
. * unreliable data stored.
Enric Fraile Algeciras
---------------------------------------------------------------------------
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
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].
February 1998
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Feb | UT
1998 | 21h 22 23 00 01 02 03 04 05 06 07
------+-------------------------------------------------------
1- 2 | 18 18 21 23 24 20 41 49 36 32 55
2- 3 | 13 16 16 18 29 36 57 51 54 67 51
3- 4 | 27 25 31 18 32 40 47 36 42 63 45
4- 5 | 10 13 25 23 31 30 45 36 49 52 35
5- 6 | 19 30 16 30 31 28 49 66 55 73 51
6- 7 |
7- 8 | 17 39 23 17 40 31 38 60 59 47 58
8- 9 | 20 34 29 30 31 31 63 49 58 ? ?
9-10 |
10-11 | 18 36 25 36 26 33 60 64 49 ? ?
11-12 | 22 ? 38 38 40 42 54 53 93? 91? 73
12-13 | 13 26 33 31 35 55 52 58 63 50 37
13-14 | 51 35 42 43 30 30 42 43 47 79 91
14-15 |
15-16 | 58 27 36 52 35 26 47 39 56 54 31
16-17 | 17 27 20 41 31 42 41 56 64 43 70
17-18 |
18-19 | 30 20 18 27 44 30 56 40 54 64 51
19-20 | 14 25 31 13 21 30 56 42 90 85 69
20-21 | 14 32 19 47 22 22 37 49 31 50 37
21-22 | 27 26 29 33 45 31 40 51 63 69 55
22-23 | 18 35 28 22 32 41 55 42 52 53 ?
23-24 | 23 34 21 32 36 46 40 63 50 46 30
24-25 | 28 35 32 23 34 34 43 44 43 61 52
25-26 | 25 37 32 40 49 41 50 64 55 70 47
26-27 | 18 39 42 30 49 40 46 42 47 58 43
27-28 | 22 32 29 36 31 39 51 48 63 68 48
28-01 | 17 27 28 34 45 37 36 68 53 57 60
------+-------------------------------------------------------
1998 | 21h 22 23 00 01 02 03 04 05 06 07
Feb | UT
Notes:
. ? probably affected by sporadic-E, direct reception.
. local time = UT + 1 hour.
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.
-----------------------------------------------------------
| Feb 1998 | 10x % reflec. time | horiz: day | vert: time |
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 19 17 14 16 11 22 22 29 18 23 22 15 20 18 23
1 | 28 18 17 16 13 16 17 18 20 22 17 22 22 25 23
2 | 25 23 28 18 11 27 20 32 20 22 21 18 24 26 20
3 | 32 31 22 25 20 26 24 36 23 19 49 19 35 30 26
4 | 42 49 36 23 23 33 23 24 30 75 44 21 42 25 38
5 | 30 23 30 16 25 23 19 69 23 25 21 22 37 24 50
6 | 53 12 30 21 17 13 20 37 22 18 23 57 28 32 46
7 | 22 39 19 20 18 14 25 25 9 25 8 23 19 21 35
8 | 8 20 18 25 8 30 29 17 6 22 27 39 32 27 25
9 | 10 21 14 23 21 13 22 21 3 34 27 9 25 19 25
10 | 20 14 10 12 16 20 34 23 5 15 23 16 16 33 24
11 | 26 29 25 9 18 29 17 39 17 19 25 17 27 14 19
12 | 18 16 10 23 7 8 16 37 12 8 17 16 18 9 24
13 | 13 12 4 10 2 14 18 14 12 13 21 13 22 15 14
14 | 8 3 4 4 5 4 7 6 6 5 9 12 7 7 3
15 | 3 8 5 2 8 6 7 10 2 6 8 4 5 5 3
16 | 6 18 4 2 4 5 4 4 8 2 6 4 4 6 6
17 | 7 3 4 4 4 9 4 20 5 8 4 11 7 6 4
18 | 8 7 6 2 4 11 6 11 7 6 7 8 10 7
19 | 30 8 8 6 9 10 8 7 11 12 5 9 13 10 12
20 | 12 19 13 11 23 14 11 16 13 10 11 20 12 11 12
21 | 21 16 13 12 12 21 20 9 14 15 11 12 15 13 6
22 | 14 16 14 10 15 14 18 17 16 17 22 18 15 13 16
23 | 26 15 12 10 14 18 15 16 14 23 14 37 20 27 28
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------------------------------------------------
| Feb 1998 | 10x % reflec. time | horiz: day | vert: time |
--------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28
---+----------------------------------------------------
0 | 24 39 13 11 20 17 18 20 21 19 26 18 16
1 | 25 26 11 12 20 21 23 24 19 19 25 17 25
2 | 20 22 18 12 25 29 36 27 29 18 23 25 18
3 | 15 25 14 13 42 20 23 20 18 15 19 21 16
4 | 35 34 17 17 30 25 26 28 17 20 19 21 25
5 | 20 42 24 19 21 20 23 16 16 24 17 22 29
6 | 23 32 13 14 37 30 42 16 45 25 23 25 33
7 | 25 18 28 23 16 17 32 26 16 23 22 26 27
8 | 16 15 9 17 27 36 27 22 23 16 17 26
9 | 17 25 10 36 19 26 21 33 32 21 10 18 39
10 | 15 19 16 19 24 30 17 23 16 19 24 20 23
11 | 20 7 13 25 14 15 23 24 21 16 18 13 31
12 | 18 10 4 10 20 16 14 17 15 13 13 16 24
13 | 17 16 3 16 8 10 20 20 7 13 7 17 13
14 | 9 5 1 5 10 8 16 14 7 6 9 4 18
15 | 11 17 5 6 8 7 9 13 5 2 3 2 5
16 | 8 2 5 4 6 4 7 5 3 3 7 4 3
17 | 5 3 2 3 5 5 8 8 5 8 2 4 12
18 | 7 3 3 9 10 5 4 6 6 4 7 5 7
19 | 11 5 4 10 8 9 9 11 17 9 10 14 10
20 | 17 12 10 17 13 19 12 14 13 15 11 11 14
21 | 24 12 9 15 16 11 21 17 14 19 16 10 20
22 | 18 12 17 10 19 18 23 17 19 18 16 18 17
23 | 30 19 11 30 15 12 18 24 19 13 11 19 20
---+----------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28
Notes:
. a quiet normal February month.
. local time = UT + 1 hour.
Pierre De Groote
---------------------------------------------------------------------------
Observer: Will Kelsey
Location: Santa Maria, CA, USA (120 26'9" W, 34 55'38" N)
Frequency: 107.9 MHz
Transmitter location: KXOA, Sacramento, CA, 50 kW FM, distance 362 km.
Antenna: Yagi FM 6 Element, heading North
Receiver: Sangean 803A
Observing Method: listening to audio (AGC disabled)
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
One hour observing period: 13h00-14h00 UT
(each observation hour is recorded in three 20 minute intervals)
Feb
1998 X-Dense B-Dense C-Dense ESA INT Total
________________________________________________________________
1 1-3-3 10- 3-8 68 None 28
2 1-2-5 5- 4-3 55 " 20
3 2-0-0 3-1-1 4- 5-6 55 " 22
4 1-0-0 5-2-1 6-10-8 52 " 33
5 2-0-0 3-2-2 6- 8-4 37 " 27
6 2-3-3 6- 6-7 67 " 27
7 1-1-6 9- 8-6 42 " 31
8 3-3-1 5- 3-3 61 " 18
9 0-1-0 1-3-3 5- 5-1 37 " 19
10 0-1-0 1-2-3 1- 7-6 76 Lo 21
11 0-1-0 0-3-0 6- 2-4 50 None 16
12 2-1-2 1- 2-5 38 " 13
13 2-5-3 4- 2-6 41 " 22
14 2-2-3 5- 4-5 67 " 21
15 1-4-1 7- 5-5 65 " 23
16 1-1-0 5- 4-6 47 " 17
17 2-3-2 2-10-6 44 " 25
18 2-4-2 1- 4-7 50 " 20
19 2-3-1 2- 3-2 62 RFI 13
20 3-5-4 5- 3-9 66 None 29
21 4-2-0 5- 8-1 50 " 20
22 5-1-5 6- 3-8 57 " 28
23 1-2-2 5- 4-1 67 " 15
24 4-3-1 1- 3-1 77 " 13
25 3-3-4 4- 9-6 72 " 29
26 1-2-3 3- 4-4 94 " 17
27 2-1-2 8- 4-2 68 Lo 19
28 1-0-4 2- 1-4 58 Lo 12
________________________________________________________________
1998 X-Dense B-Dense C-Dense ESA INT Total
Feb
Will Kelsey
---------------------------------------------------------------------------
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. Omnidirectional
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 (-150 dBm) 500 Hz IF filter
Antenna: 2 element Yagi, pointed to the zenith
Observing method: FFTDSP software,automatic data saving and manual count.
Hourly echoes over 10 dB SNR
1998
Feb| 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
23JST
Feb| 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 | 10 24 17 20 23 22 21 18 26 -- 22@16 n 9 6 5 10 7 4 5 12 16 22 --
02 | 35 34 34 37 39 35 37 25 23 13 16 n n 10 @6 6 7 3 7 7 12 15 24@26
03 | 21 39 25 33 34 25 30 32 29 34 15 n@13 14 17 3 9 2 9 0 8 14 20@26
04 | 29 29 38 47 34 30 26 16 29@18 n 20@12 n@13 4 4 9 5 2 11 12 27@18
05 | 24 26 31 31 37 35 23 26 17 18 24 21 11 14 8 n @3 3 4 7 6 16 17@30
06 | 22 24 18 32 32 21 24 25 23 19 14 18 12 11 11 8 7 6 4 6 13 17 14@22
07 |@21 27 32 47 44 34 25 25 33 29 26 24 14 16 11 7 8 8 6 9 11 21 22@27
08 | 34 22 31 36 36 30 25 21 26 16 27@25 15 15 10 12 8 4 4 5 10 23 18@32
09 | 16 21 25 26 31 37 22 19 25 30 28 20 19 14 11 5 11 3 3 5 15 21 29@21
10 | 24 23 27 39 27 37 30 20 21 28 18 14 14 19 14 13 6 5 6 8 9 18 20@18
11 | 18 18 28 35 34 26 34 15 22 23@14 n n 8 9 6 3 3 7 8 12 13 15 --
12 | 23 21 28 28 34 24 26 22 23 26 25 25 20 21 14 4 3 7 7 6 11 14 23@19
13 | 22 22 29 30 33 28 33 24 25 19 15@12 17 15 6 6@10 5 5 8 13 14 24@18
14 | 22 14 24 27 38 24 33 25 27 20 23 24 25 18 17 11 6 3 3 8 12 21 16@19
15 | 21 25 23 41 31 28 27 23 24@28 31 25 16 17 8 3 3 5 5 4 12 20 14 --
16 | 26 24 28 29 21 25 32 14 24 20 21 16 5 8 6 3 3 2 4 8 10 15 23@20
17 | 25 28 24 27 31 32 28 17 24 23 22 16 n 10 6 7 2 5 3 9 13 18 20@21
18 | 22 31 36 33 23 24 17 28 25 26 27 n n 12 10 10 7 7 6 8 6 19 24@25
19 | 24 22 17 22 28 32 26 23 23 30 15 19 20 16 11 10 5 6 7 8 4 15 17@19
20 | 27 29 25 25 31 24 35 24 30 35 26 19 15 9 13 10 5 7 5 8 12 19 16@26
21 | 30 26 30 31 33 40 37 23 28 29 28 20 16 19 13 8@12 6 7 8 11 18 24@24
22 | 21 24 29 31 30 31 35 32 35 25 14 19 17 17 3 @6 8 8 5 13 9 16 22@23
23 | 23 23 35 23 29 27 27 32 22 29 26 27 17 19 16 10 11 4 8 9 11 15 21@25
24 | 23 21 29 25 23 40 24 30 27 32 22 28 19 13 21 9 5 13 6 2 9 17 34@23
25 | 18 30 33 29 37 35 29 35 26 27 22 20 20 19 14 10 12 2 3 6 10 14 33@18
26 | 39 25 26 24 36 38 32 27 21 28 22 25 15 17 4 14 3 14 10 5 14 20 29@20
27 | 28 21 32 32 21 41 36 29 25 29 30 27 26 15 16 @6 6 8 6 7 15 14 25@33
28 | 31 21 31 30 21 32 27 27 34 18@15 13 11 9@12 8 4 2 n n 7 18 16@18
---+------------------------------------------------------------------------
---
Feb| 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
Feb| 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
Feb| 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
23JST
Feb| 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 | 1 1 2 1 2 1 1
02 | 1 2 2 1 1 2 1
03 | 2 1 4 1 1 1 1 1 1
04 | 1 3 3 1 1 5 1 1 1
05 | 1 1 2 1 1 1 1 1
06 | 1 3 1
07 | 1 1 2 1 2 2 1 1 1 1
08 | 3 1 1 1 1 3 1 2 1 3 1
09 | 1 2 3 2 2 1 2 2
10 | 1 3 3 1 2 2 1 1
11 | 3 3 2 2 1 2 2
12 | 1 4 2 1 1 2 1 1 1 1 2
13 | 1 1 1 4 1 1 1 1
14 | 3 1 3 1 1 1 1
15 | 1 1 1 3 1 2 1 1 1
16 | 1 4 2 2 1 1 1 1 1
17 | 1 3 1 1 2 1 1 1 1
18 | 2 2 4 2 1 1 1 1 1 2
19 | 1 1 2 4 1 1 1 1 1
20 | 1 3 1 1 2 1 1 1 1 3
21 | 1 1 1 1 1 1 3 1 2 2
22 | 2 2 3 1 1 2 2
23 | 1 1 1 1 1 1 1
24 | 1 1 1 2 1 1
25 | 1 1 3 1 2 1 1
26 | 1 2 2 1 1 1 1 1 1
27 | 3 1 3 2 2 1 1 1 1 1 1
28 | 1 1 1 3 5 1 1 1
---+------------------------------------------------------------------------
---
Feb| 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
Feb| 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)
Feb 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----------------------------------------------------------------
1 0 1 1 1 1 2 2 0 2 0 1 1 1 0
Feb 16 17 18 19 20 21 22 23 24 25 26 27 28
--------------------------------------------------------
1 1 0 1 2 4 0 1 0 0 0 0 0
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.
JST = UT + 9 h
Sadao Okamoto / via Kimio Maegawa
---------------------------------------------------------------------------
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.
Feb | UT
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
------+-------------------------------------------------+-----------
1 | 11 20 12 17 14 9 21 13 16 16 | 13.8 16.5
2 | 9 12 15 19 15 15 22 18 18 15 9 7 | 14.2 14.8
3 | 11 9 17 21 16 | 14.8
4 | 22 24 18 23 57 26 27 25 16 26 22 | 28.8 23.7
5 | 8 16 20 24 15 25 25 31 27 24 15 17 | 18.0 23.2
6 | 16 17 23 17 16 17 12 14 14 13 13 18 | 17.7 14.0
7 | 5 7 17 11 6 11 12 14 19 18 12 9 | 9.5 14.0
8 | 7 13 11 15 20 16 12 9 14 13 8 14 | 13.7 11.7
9 | 7 21 25 22 9 22 17 15 14 14 10 13 | 17.7 13.8
10 | 7 11 9 15 12 18 19 15 15 14 16 16 | 12.0 15.8
11 | 5 13 14 7 16 13 16 20 14 9 14 12 | 11.3 14.2
12 | 5 11 10 10 10 9 14 12 5 17 11 13 | 9.2 12.0
13 | 8 15 12 9 6 14 8 11 12 11 9 17 | 10.7 11.3
14 | 14 15 17 17 16 17 18 24 16 14 | 15.8 17.5
15 | 3 10 9 15 14 15 10 14 20 16 15 12 | 11.0 14.5
16 | 13 13 13 15 23 14 17 10 21 23 12 16 | 15.2 16.5
17 | |
18 | 12 26 15 19 15 16 11 18 13 21 | 18.0 15.7
19 | 9 12 12 11 16 10 20 12 15 17 17 17 | 11.7 16.3
20 | 7 13 15 17 14 15 28 21 14 15 13 17 | 13.5 18.0
21 | 18 13 12 20 13 19 11 20 14 15 12 21 | 15.8 15.5
22 | 16 14 15 20 18 20 14 14 19 18 19 17 | 17.2 16.8
23 | 10 12 19 18 14 16 21 17 15 19 15 24 | 14.8 18.5
24 | 5 11 18 21 16 | 14.2
25 | 16 20 29 16 17 19 24 18 18 16 26 | 19.6 20.2
26 | 17 14 21 23 23 21 14 11 19 14 13 10 | 19.8 13.5
27 | 16 12 16 15 15 19 17 22 17 16 13 | 14.8 17.3
28 | 6 19 12 16 16 17 15 15 15 14 13 17 | 14.3 14.8
------+-------------------------------------------------+-----------
1998 | 11 12 13 14 15 16 17 18 19 20 21 22 | *(1) **(2)
Feb | 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
2. ANNOUNCEMENT
The cambridge-conference-list is a scholarly electronic network organised by
Dr Benny J Peiser at Liverpool John Moores University, United Kingdom.
For further information, please contact <b.j.peiser@livjm.acdot uk>.
From: CAMBRIDGE-CONFERENCE DIGEST, 23 January 1998
BRITISH SCIENTISTS DEVELOP METEOR SCATTER PREDICTION MODEL
A. Akram & P. S. Cannon: A meteor scatter prediction model and its
application to adaptive beam steering. RADIO SCIENCE, 1997, Vol.32,
No.3, pp.1023-1035
A computer model to predict the underdense meteor arrival rate over a forward
meteor scatter communications link is presented. The model incorporates
important effects such as major shower streams, a nonuniform radiant
distribution, and antenna polarization coupling.
...
A comparative study between monthly predictions and experimental data from a
high-latitude link in Greenland over a year shows reasonable agreement but
highlights the need for higher-resolution radiant data.
3. 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).
5. 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)
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
Call: OE8FNK, packet: OE8FNK@OE8XPK.#CAR.AUT.EU
E-mail: kuneth@net4you.co.at
Kimio Maegawa
Fukui National College of Technology, Electro-Information Course
Geshi, Sabae Fukui 916 JAPAN
Call:JA9BOH,JA9YDB
E-mail: kmaegawa@fukui-nct.ac.jp and/or HAG00032@niftyserve.or.jp
http://www.fukui-nct.ac.jp/~kmaegawa/hro
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
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
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Christian Steyaert (RMOB9802) 7 March 1998
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