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(meteorobs) Radio Meteor Obs. Bull. Jan 1998: Quadrantids, no H-Bids (1 of 2)
Radio Meteor Observation Bulletin No. 54 February 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.
Antenna: 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.
| Jan 1998
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 14 16 10 45 9 11 10 7 10 6 12 4 8 10 9
1 | 22 10 17 39 9 9 13 11 7 12 9 19 10 18 10
2 | 25 13 16 53 16 17 18 13 16 10 17 13 23 16 10
3 | 27 21 25 43 14 24 26 15 19 12 13 30 26 13 20
4 | 35 23 13 43 26 24 22 16 24 27 22 23 20 29 26
5 | 31 32 28 37 24 20 23 12 22 24 29 20 27 21 17
6 | 36 28 46 26 22 31 13 29 24 19 24 19 20 15 17
7 | 25 29 28 17 20 22 20 28 24 12 24 24 27 11 13
8 | 25 26 25 24 22 28 26 19 24 20 17 25 18 23 16
9 | 33 31 32 34 54 18 34 38 27 15 35 33 33 22 14
10 | 28 43 44 40 41 18 44 44 32 33 40 19 38 19 12
11 | 34 57 87 34 45 24 46 27 32 28 27 27 38 14 26
12 | 42 74 133* 51 52 34 27 29 29 31 38 28 38 38 33
13 | 32 65 129* 52 37 35 30 34 38 30 36 23 28 32 19
14 | 27 48 120* 69 22 37 32 25 38 27 18 24 30 28 19
15 | 45 51 120* 54 39 30 15 27 25 30 18 13 21 17 24
16 | 34 46 71 46 27 18 17 22 19 16 22 30 24 16 25
17 | 20 33 73 35 27 33 14 12 9 11 9 12 12 9 7
18 | 15 19 42 21 17 25 15 11 15 10 8 10 16 15 12
19 | 15 22 37 15 18 10 6 12 9 7 6 9 10 9 9
20 | 14 17 34 9 9 9 9 10 15 9 10 8 5 6 9
21 | 12 24 24 17 13 8 10 10 7 10 7 8 7 6 10
22 | 12 17 25 16 10 14 11 2 10 15 10 7 2 14 5
23 | 19 16 45 13 12 13 10 11 9 11 5 11 6 3 4
---+------------------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| Jan 1998
| Jan 1998
UT | 16 17 18 19 20 21 22 23 24 25
---+----------------------------------------
0 | 7 9 8 10 10 8 3 4 3 6
1 | 8 12 4 11 15 25 2 4 8 6
2 | 6 9 6 10 12 16 3 5 5 12
3 | 13 21 5 8 24 18 4 4 12 1
4 | 20 16 12 14 23 24 12 11 16 10
5 | 15 23 20 25 23 15 9 9 9 12
6 | 21 21 16 21 23 18 10 13 13 13
7 | 23 15 6 17 31 18 7 4 15 11
8 | 24 19 11 17 32 16 12 8 14 5
9 | 23 11 13 21 21 15 7 12 13 12
10 | 18 16 9 34 37 19 11 13 11 5
11 | 21 30 12 39 29 23 12 7 14 3
12 | 26 39 30 31 22 29 5 13 12 12
13 | 27 36 27 34 29 22 13 13 11
14 | 33 30 22 28 26 13 9 16 15
15 | 29 36 19 26 10 12 9 17 8
16 | 14 13 14 18 15 8 7 14 17
17 | 13 16 20 23 18 4 9 10 14
18 | 14 18 7 11 12 7 8 7 11
19 | 2 7 9 15 14 8 11 2 18
20 | 9 5 7 13 9 10 7 4 8
21 | 7 9 7 10 12 6 9 9 5
22 | 7 5 12 14 8 5 3 3 3
23 | 4 9 4 17 9 3 5 4 7
---+----------------------------------------
UT | 16 17 18 19 20 21 22 23 24 25
| Jan 1998
Notes:
. ? probably affected by sporadic-E, direct reception
. data loss from Jan 25 onwards due to electricity fault
. observed Quadrantids maximum on Jan 3, 12-15h UT
Enric Fraile Algeciras
---------------------------------------------------------------------------
Observer: Eisse Pieter (Peter) Bus
Location: Groningen, Netherlands (6 deg 33' E, 53 deg 13' N)
Frequency: 72.11 MHz
Transmitter Location: Wroclaw, Poland, 130 kW, Distance 740 km
Antenna: Yagi, 3 elements, geographical azimuth 106 deg (ESE),
elevation 13 deg
Receiver: Bearcat UBC 860 XLT Scanning Radio, sensitivity: 0.5 uV
Observing method: Listening and counting in 5-minute intervals.
Mean "sporadic" activity on Jan 15/16 1998 during one hour starting at UT:
"Hale-Boppids" ?? Bootids
------------------------------------------------------------
23h 0h 1h 2h 18h25m 19h 20h 21h
------------------------------------------------------------
100 116 140 152 46@ 71 94 -
------------------------------------------------------------
Activity on Jan 2/3 1998 during one hour starting at UT:
--------------------------------------------------------------
23h 0h 1h 2h 18h25m 19h 20h 21h
--------------------------------------------------------------
113 156 149 161 152@ 106 88 107
--------------------------------------------------------------
Notes:
. @ hourly rate extrapolated
. higher activity more than three sigma's above "sporadic" average is
only observed in the hour before the Earth crossed the orbital plane
of Comet Hale-Bopp around 1h UT on January 3.
Peter Bus
---------------------------------------------------------------------------
Observer: Maurice De Meyere
Location: Deurle, Belgium (3 37' E, 51 00' N)
Frequency: 66.51 MHz
Transmitter locations (all stations of more than 10 kW):
66.35 MHz, Klaipeda, Lithuania 12 kW, 05h00-22h00
66.47 Viesintos Lithuania 12 05h00-22h00
66.62 Budapest Hungary 100 24hrs
66.68 Valmiera Latvia 20 04h30-22h00
Antenna: crossed Yagi, 4 elements, astronomical azimuth 270 deg (= E),
elevation 27 deg.
Antenna amplifier: 25 dB max level 90 dBmuV
Receiver: commercial, Progresson 447A, TESLA (Bratislava)
The receiver was calibrated with a Marconi TF2008 signal
generator. Sensitivity: 5 muV (modulation frequency
1000 Hz, frequency sweep 38 kHz) at (S+N)/N = 20 dB
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].
January 1998
Quadrantids
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Jan | UT
1998 | 21h 22 23 00 01 02 03 04 05 06 07 08
------+------------------------------------------------------------
1- 2 | 30 44 46 58 59 58 67 80 66 68 45
2- 3 | 21 52 56 63 80 61 89 84 92 74 69
3- 4 | 117 126 162 151 127 107 131 99 92 80 68 87
4- 5 | 18 24 30 40 53 79 81 79 70 86 63
5- 6 | 13 53 54 50 52 60 78 72 69 51 113
6- 7 | 44 48 28 38 57 64 58 56 80 104 103
7- 8 | 19 17 36 32 37 48 67 78 73 67 59
8- 9 |
9-10 |
10-11 | 21 34 31 44 40 43 74 89 76 62 64
11-12 | 31 37 31 48 50 57 83 77 85 73 70
12-13 | 42 27 48 33 49 52 73 76 75 87 77
13-14 | 21 35 39 45 51 59 57 68 67 74 58
14-15 | 26 44 48 44 64 63 80 88 73 59 67
15-16 | 19 37 35 49 49 48 74 77 49 53 62
16-17 | 21 23 37 43 68 68 65 97 62 116 94
17-18 |
18-19 | 20 72 31 51 41 51 80 75 86 47 54
19-20 | 22 12 17 40 30 24 50 58 47 57 79
20-21 | 19 33 32 53 67 55 80 89 102 67 56
21-22 | 17 26 16 27 56 35 55 60 51 52 74
22-23 | 26 19 20 30 27 33 58 60 46 54 57
23-24 | 17 25 35 29 36 44 84 85 62 77 64
24-25 | 14 25 35 19 40 23 62 76 72 119 68
25-26 |
26-27 | 14 22 18 26 34 29 55 55 44 74 74
27-28 | 16 21 23 37 32 36 44 38 32 92 43
28-29 | 16 21 21 38 37 39 64 83 67 55 59
29-30 | 21 26 23 36 33 45 72 70 45 58 57
30-31 | 16 28 33 34 42 53 60 42 62 52 59
31-01 | 11 19 17 36 17 34 52 49 29 42 39
------+------------------------------------------------------------
1998 | 21h 22 23 00 01 02 03 04 05 06 07 08
Jan | UT
Notes:
. ? probably affected by sporadic-E, direct reception.
. local time = UT + 1 hour.
. Quadrantids activity on Jan 3-4
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.
-------------------------------------------------------------
| Jan 1998 | 10x % reflec. time | horiz: day | vert: time UT|
----------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---+------------------------------------------------------------
0 | 42 52 37 134 27 29 30 22 26 24 20 24 21 20 30
1 | 37 44 58 110 41 28 38 25 31 40 25 33 31 31 42
2 | 47 39 52 96 47 40 57 57 49 34 44 31 40 61 44
3 | 46 44 54 48 40 37 43 38 42 33 47 37 46 43 37
4 | 49 51 75 79 46 43 51 58 61 39 58 42 39 40 55
5 | 63 46 78 68 52 45 35 31 44 26 42 45 36 38 50
6 | 55 42 62 58 52 123 37 38 32 32 47 49 44 61 42
7 | 52 53 85 61 46 89 97 28 60 32 32 37 44 48 43
8 | 65 64 130 102 58 44 34 36 28 30 28 27 45 32 43
9 | 38 63 134 47 33 39 31 31 29 25 32 8 42 40 32
10 | 54 94 142 50 47 32 49 27 26 21 31 10 34 23 21
11 | 37 105 189 50 38 45 26 35 17 12 17 5 39 12 17
12 | 34 80 161 59 41 30 35 20 47 25 17 4 23 36 32
13 | 48 57 222 21 35 22 20 20 22 22 18 10 8 10 33
14 | 39 51 219 25 17 13 10 18 49 17 19 8 9 9 9
15 | 21 30 133 30 13 7 7 11 7 12 11 6 5 5 10
16 | 17 27 67 18 11 6 11 13 2 9 7 5 8 9 10
17 | 13 17 68 16 11 11 12 10 5 11 7 8 10 12 5
18 | 17 16 91 20 9 13 14 17 11 7 14 11 10 9 13
19 | 24 29 84 24 27 16 19 19 7 19 15 14 10 8 17
20 | 47 37 88 22 24 14 23 16 11 17 20 20 18 26 20
21 | 46 37 100 32 28 55 24 25 18 24 19 35 28 29 24
22 | 36 52 151 36 27 45 24 19 18 20 22 26 21 38 21
23 | 43 50 194 38 38 31 24 22 16 23 20 27 32 28 42
---+------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------------------------------------------------
| Jan 1998 | 10x % reflec. time | horiz: day | vert: time |
--------------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
---+----------------------------------------------------------------
0 | 49 34 28 38 35 37 23 13 15 17 27 20 18 108 19
1 | 39 44 44 51 30 43 49 24 35 23 28 15 32 24 32
2 | 33 56 42 62 33 46 40 24 36 23 21 30 19 36 26
3 | 44 34 52 51 34 35 27 33 42 28 27 31 29 39 39
4 | 49 82 61 45 47 66 31 27 43 56 32 30 23 42 50
5 | 46 40 45 46 30 45 40 27 70 48 30 13 37 30 26
6 | 35 34 60 38 59 36 34 36 35 54 15 44 25 32 29
7 | 50 32 33 44 68 34 53 29 33 38 20 24 39 38 33
8 | 32 54 43 38 52 24 27 41 38 36 10 21 29 16 28
9 | 47 39 38 24 33 23 38 32 35 26 29 8 32 16 21 26
10 | 32 65 34 20 38 15 30 30 37 24 19 16 17 17 13 69
11 | 34 33 28 46 31 15 19 9 29 17 11 12 27 14 24 20
12 | 10 35 25 13 32 14 62 8 19 29 10 11 17 19 10 14
13 | 14 25 21 32 10 7 10 14 20 16 6 11 21 13 12 14
14 | 9 12 12 14 13 8 28 16 11 12 6 7 5 10 7 8
15 | 5 18 8 9 13 10 16 7 7 14 7 4 3 6 6 10
16 | 9 18 10 17 27 3 6 4 7 10 3 9 4 3 4 6
17 | 5 11 11 8 14 7 6 7 9 8 5 4 15 6 7 7
18 | 10 19 15 9 21 8 6 7 7 7 6 6 8 5 7 9
19 | 10 12 21 15 22 13 12 11 12 12 10 15 21 9 7 6
20 | 17 22 27 18 26 11 17 13 16 26 1 20 25 9 20 11
21 | 26 31 35 31 27 20 20 18 22 14 37 28 21 24 19
22 | 25 30 48 24 29 42 15 10 18 24 22 23 17 27 24
23 | 32 22 36 23 29 26 26 13 16 17 17 20 59 20 21
---+----------------------------------------------------------------
| 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Notes:
. observed Quadrantids maximum on Jan 3, 13-14h UT
. local time = UT + 1 hour
Pierre De Groote
---------------------------------------------------------------------------
Observer: Ou Yang Tian Jing
Location: Wu Han, Hu Bei, P.R. of China (114 17' E, 30 30' N)
Frequency: 95.9 MHz
Transmitter location: FM of Korea
Antenna: 5-element Yagi, astronomical azimuth 200 deg, elevation 20 deg.
Receiver: receiver with digital tuner (DS R-3000)
Observing method: listening
| 1998
UT | Jan 1 Jan 2 Jan 3* Jan 4 Jan 5
---------------+----------------------------------
18h00m-18h30m | 1 13 0 3
18h30m-19h00m | 2 12 9 1 3
19h00m-19h30m | 0 9 16
19h30m-20h00m | 1 6 11
20h00m-20h30m | 1 8
20h30m-20h40m | 1
Notes:
. local time = CST = UT + 8 hours
. the duration of the reflections ranged between 0.2 s and 3 s
. * 10 minutes later (18h10-18h40 instead of 18h00-18h30 etc.)
Ou Yang Tian Jing
---------------------------------------------------------------------------
Observer: Will Kelsey
Location: Santa Maria, CA, USA (120 26'9" W, 34 55'38" N)
Frequency: 98.5 MHz, 107.9 MHz from Jan 11 onwards
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)
Enhancement Duration 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
Note: each observation hour is recorded in three 20 minute intervals
_________________________________________________________________________
A Study Of Meteor Reflectance Characteristics
And Their Distribution In The Stream
-------------------------------------------------------------------------
Jan
1998 hr-UT X-Dense B-Dense C-Dense ESA INT Total
-------------------------------------------------------------------------
1 1300-1400 0-0-0 3- 7- 2 4- 5-11 72 None 32
2 " 2- 1- 5 8- 6- 7 52 " 29
3QUA 1300-1400 1-2-0 1-10-11 9- 7-10 53 " 51
3QUA 1900-2000 2-2-1 6-11-10 2-16- 9 58 " 59
4 1300-1400 3- 5- 2 4-12- 8 88 Hi 34
5 " 2-0-0 3- 4- 2 7- 4- 4 50 None 26
6 " 4- 4- 0 6- 5- 5 71 Lo- 24
7 " 1-0-0 1- 3- 4 7- 8- 5 48 None 29
8 " 1-0-0 6- 3- 1 11-11- 5 74 " 38
9 " 2- 2- 1 6- 8- 7 65 " 26
10 1300-1400 2- 4- 1 2- 5- 1 60 Lo- 15
The observing frequency was changed to 107.9 MHz because of RFI
11 1300-1400 0-1-0 6- 1- 3 9- 4- 7 58 None 31