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(meteorobs) Radio Meteor Obs. Bull. March 1999
Radio Meteor Observation Bulletin No. 68 April 1999
1. FORWARD SCATTER METEOR OBSERVATIONS
Observer: Enric Fraile Algeciras
Location: Paseo Bonanova, 8 Barcelona (02 07'E, 41 24' N)
Frequency: 48.24715 MHz.
Transmitter Location: still working to identify, possibly South German C2,
100 kW, horizontal polarisation)
Antenna: 6-element Yagi 617-6B, 14 dBd gain.
astronomical azimuth 215 deg (=NE), elevation 0 deg.
Antenna: Six element Yagi 617-6B, 14 dBi gain, horizontal polariz.
Azimuth 200 deg (NE), elevation 20 deg
Receiver: home made converter 20 dB gain, 1 dB noise and Kenwood TS-830S.
10 dB attenuator in the receiver to reduce direct reception
Sensitivity: 0.25 uV for 10 dB S/N
Observing method: the audio signal of the video carrier is received using
a narrow CW filter (500 Hz) and fed into the PC in real time.
Data sampling system: using a super 14 bits A/D card to PC/XT
and "Data Capture" software with 1 second/18 sampling interval
to store all the > 0.5 s reflections.
| Mar 1999
UT | 1 2 3 4 5 6 7 8 9 10
----+-------------------------------------------------
0 | 4 4 1 9 14 15 9 10 10 7
1 | 8 2 0 6 6 6 16 10 5 25
2 | 1 6 0 2 3 14 18 9 11 8
3 | 8 2 0 1 8 10 17 4 7 6
4 | 3 1 0 8 9 11 8 14 6 0
5 | 8 1 1 4 10 10 6 4 7 1
6 | 4 5 2 10 12 11 12 10 8 0
7 | 6 2 2 11 11 10 11 10 11 0
8 | 7 3 1 18 19 6 16 6 11 0
9 | 4 3 2 12 24 14 30 9 14 0
10 | 3 1 1 12 14 11 23 13 9 0
11 | 11 0 0 3 11 3 10 7 9 19
12 | 2 0 3 2 4 7 37 13 6 46
13 | 0 1 1 2 7 5 6 2 2 25
14 | 0 0 1 4 2 5 3 8 2 7
15 | 0 0 1 2 1 5 9 5 1 2
16 | 2 0 0 0 3 14 3 11 3 3
17 | 0 0 0 5 4 9 5 3 3
18 | 1 1 2 2 2 1 8 10 3
19 | 5 1 0 0 4 9 20 0 6
20 | 2 0 0 4 5 17 4 5 2
21 | 0 0 3 5 4 25 16 3 5
22 | 5 0 6 13 9 15 17 12 9
23 | 3 0 2 13 15 17 11 10 4
----+-------------------------------------------------
UT | 1 2 3 4 5 6 7 8 9 10
| Mar 1999
| Mar 1999
UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
----+--------------------------------------------------------------------------
0 | 7 14 13 9 11 21 9 20 13 13 0 27 1 3
1 | 9 7 18 10 14 16 8 23 7 23 0 36 2 2
2 | 4 9 31 7 14 14 8 41 13 45 0 46 7 3
3 | 9 14 31 6 15 9 10 44 17 39 3 36 3 2
4 | 5 11 13 6 14 16 10 33 13 31 14 41 3 4
5 | 7 7 28 8 16 40 4 12 10 16 23 33 3 5
6 | 3 11 22 12 34 47 14 31 10 58 12 38 2 3
7 | 9 7 22 11 16 44 15 13 19 47 26 30 6 3
8 | 9 18 26 9 35 39 10 16 20 29 50 21 7 4
9 | 5 19 12 11 38 52 11 27 24 20 39 5 2 12
10 | 7 18 12 10 37 17 16 36 41 45 55 42 9 6
11 | 8 2 2 9 38 12 17 12 36 53 38 43 2 2
12 | 6 10 3 4 17 4 8 14 17 59 38 36 2 3
13 | 1 5 4 8 10 5 9 5 18 37 36 36 1 2
14 | 4 12 6 6 7 5 10 2 5 31 21 21 1 3
15 | 3 2 4 2 6 9 4 1 28 32 22 27 3 1
16 | 3 1 2 8 6 5 17 8 34 32 19 8 1 0
17 | 3 5 3 5 5 2 29 11 29 32 22 16 2 1
18 | 7 1 2 1 6 7 24 6 16 9 13 14 2 0
19 | 1 3 2 6 6 10 4 16 8 26 9 18 17 2 0
20 | 6 7 7 2 3 4 2 15 8 23 6 14 15 2 2
21 | 5 4 9 4 7 12 13 10 2 9 3 16 3 3
22 | 3 14 7 12 11 10 12 27 10 4 2 16 6 6 5
23 | 7 13 13 11 11 21 9 27 11 6 1 39 1 3 7
----+--------------------------------------------------------------------------
UT | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
| Mar 1999
Notes:
. ? possibly interference
. problems in processing the data between March 10-17
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
March 1999
Number of meteors heard in one hour interval
| UT
Mar | 09 10 11 12 13 14 15 16 17 18 19 20
----+-----------------------------------------------
26 | - - - - 12 17 21 19 - - - -
27 | - - - 2 3 5 - 2 - - - -
28 | - - - - 1 3 2 - - - - -
29 | - - - - - - - - - - - -
30 | - - - - 3 10 4 - - - - -
31 | - - - 7 3 2* - - - - - -
----+-----------------------------------------------
| 09 10 11 12 13 14 15 16 17 18 19 20
Notes:
. no corrections for radiant position made to the counts.
. ( - ) means no observations made.
. * = Interference
. filter frequency re-adjusted (drifted off by 30 kHz)
Mike Boschat
---------------------------------------------------------------------------
Observer: Maurice De Meyere
Location: Deurle, Belgium (3 37' E, 51 00' N)
Frequency: 66.51 MHz
Transmitter locations (all stations of more than 10 kW):
66.35 MHz, Klaipeda, Lithuania 12 kW, 05h00-22h00
66.47 Viesintos Lithuania 12 05h00-22h00
66.62 Budapest Hungary 100 24hrs
66.68 Valmiera Latvia 20 04h30-22h00
Antenna: crossed Yagi (x form), 4 elements, astronomical azimuth 270 deg
(= E), elevation 27 deg.
Antenna amplifier: 25 dB max level 90 dBmuV
Receiver: commercial, Progresson 447A, TESLA (Bratislava)
The receiver was calibrated with a Marconi TF2008 signal
generator. Sensitivity: 5 muV (modulation frequency
1000 Hz, frequency sweep 38 kHz) at (S+N)/N = 20 dB.
SWR of antenna alone at 66.5 MHz: 1.4/1 (good to very good),
measured with MFJ/259P SWR analyzer (HF-VHF 1.8 MHz to 170 MHz)
on Sep 28, 1998.
Observing method: automated setup, 150 samples/second, 8 bit resolution.
[Time and details of all individual meteor reflections are stored
on file in the University of Ghent format (Prometeos), and are
available for further analysis. Reduction software for DOS and
Windows available].
March 1999
Raw counts of reflections with a duration of at least 0.027 s
during one hour interval starting at UT:
Mar | UT
1999 | 20h 21 22 23 00 01 02 03 04 05 06 07
------+------------------------------------------------------------
1- 2 | 57 42 68 51 55 41 50 39 50 ? 62
2- 3 | 40 40 62 70 55 42 50 45 ? 56 ?
3- 4 | 66 ? 48 52 58 51 41 48 59 52 ?
4- 5 | ? 31 ? ? 26 35 43 34 34 66 ?
5- 6 | 54 79 53 41 31 36 33 23 64 48
6- 7 | 37 27 33 31 33 47 22 14 34 50 51
7- 8 | 47 42 34 28 25 31 22 23 46 45 56
8- 9 | 48 30 67 38 25 15 27 23 34 31 61
9-10 | 62 40 ? 75 22 29 18 27 26 69 66
10-11 | 35 35 69 50 22 20 18 26 42 ? ?
11-12 | ? 57 ? ? 41 27 25 19 34 55 61
12-13 | ? 17 30 66 24 27 34 28 22 ? ?
13-14 | 74 ? 33 34 36 19 32 29 42 29 36
14-15 | 67 ? ? ? 19 19 25 28 ? ? ?
15-16 |
16-17 |
17-18 | 41 80 62 ? 19 31 19 26 30 45 61
18-19 | 36 22 78 34 19 28 31 26 27 54 ?
19-20 | 33 21 29 69 24 28 19 18 37 49 ?
20-21 | 53 ? ? ? 32 23 31 26 25 38 34
21-22 | 50 23 38 40 17 23 27 17 20 31 30
22-23 | 40 28 32 20 33 59 23 44 27 47 42
23-24 | 27 42 39 27 33 34 30 30 ? ? ?
24-25 | 50 33 73 65 35 32 27 43 49 68 43
25-26 | 27 24 30 30 28 34 29 21 47 49 57
26-27 | 44 48 69 ? 28 33 41 29 ? ? ?
27-28 | 67 73 38 39 50 13 19 33 28 40
28-29 |
29-30 | 29 26 56 49 27 30 28 25 24 40 34
30-31 | 43 20 ? ? 47 23 22 31 28 55 ?
31-01 | 37 ? ? 43 29 42 42 38 53 34 69
------+------------------------------------------------------------
1999 | 20h 21 22 23 00 01 02 03 04 05 06 07
Mar | UT
Raw counts of reflections with a duration of at least 1.000 s
during one hour interval starting at UT:
Mar | UT
1999 | 20h 21 22 23 00 01 02 03 04 05 06 07
------+------------------------------------------------------------
1- 2 | 12* 6 12 7 4 3 6 5 5 14 17*
2- 3 | 2 6 7 10 5 4 3 6 7 12* 13
3- 4 | 9 32? 3 6 10? 5 6 1 6 1 16
4- 5 | 28? 6 15 19 2 2 4 5 3 10 25?
5- 6 | 19* 16* 13* 2 6 5 2 0 10 9
6- 7 | 9* 4 6 3 0 7 2 0 5 7 9
7- 8 | 8 9* 6 6* 2 3 3 2 3 5 16*
8- 9 | 4 3 14* 7 1 1 1 2 7* 4 10
9-10 | 15* 12* ? 28* 3 7* 1 3 2 21* 7
10-11 | 11* 6 13 12* 0 2 1 4 9* ? ?
11-12 | ? 23* 26* ? 7 3 0 2 4 10 18*
12-13 | ? 4* 8* 9 4 3 0 3 2 ? ?
13-14 | ? ? 6 2 4 2 2 1 8 5 5
14-15 | 26? 27? ? ? 5* 1 1 2 ? ? ?
15-16 |
16-17 |
17-18 | 10* 33? 17* ? 1 6 6 2 4 11* 12
18-19 | 5 3 ? 11* 1 2 5 2 1 8 ?
19-20 | 3 4 11* 11 2 4 1* 0 5 10* ?
20-21 | 12* ? ? ? 3 4 1 1 1 7 7*
21-22 | 12* 4 4 4 6* 1 2 1 0 4 9*
22-23 | 6 6* 5 2 1 ? 2 2 2 10* 7
23-24 | 8* 12* 5 5 2 5 6 2 ? 25? 15?
24-25 | 13* 16* 12 ? 1 5 4 1 5 15* 10*
25-26 | 2 1 6 3 2 3 2 0 8 5 8
26-27 | 7 7 18* ? 3 2 5 0 ? ? ?
27-28 | 20? 17? 6 8* ? 1 1 1 1 2 6
28-29 |
29-30 | 7* 6* 16* 12* 3 0 5 0 1 5 5
30-31 | 4 2 ? ? 12* 4 7* 2 4 8 ?
31-01 | 11* ? ? 6 5 5 4 5 7 3 13
------+------------------------------------------------------------
1999 | 20h 21 22 23 00 01 02 03 04 05 06 07
Mar | UT
Notes:
. further hardware modifications:
- March 5: filter between receiver and power supply (will still be
moved to between antenna and antenna amplifier)
- March 21: low pass filter between receiver and A/D convertor.
. ? 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 + 1 hours until March 27,
summer hour from March 28 onwards (local time = UT + 2 hours)
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.
-----------------------------------------------------------------
| Mar 1999 | 10x % reflec. time | horiz: day | vert: time in UT |
----------------------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
---+------------------------------------------------------------------------
0 | 12 25 20 18 25 15 14 10 12 6 14 6 16 17 8 9 9 19
1 | 7 23 19 17 14 13 10 11 10 8 11 7 25 34 22 17 28 15
2 | 22 12 20 20 13 15 18 11 9 8 14 7 21 19 10 37 19 21
3 | 31 21 18 18 28 31 9 15 14 14 23 12 22 20 34 25 24 22
4 | 23 27 33 22 18 25 22 33 22 20 22 29 23 32 26 32 17 29
5 | 30 25 37 31 26 18 23 16 17 10 18 24 26 40 36 22 17 26
6 | 14 24 30 30 30 23 35 14 22 19 21 19 39 21 14 36 38 21
7 | 17 29 36 37 41 23 17 15 18 22 17 23 21 34 16 35 11 35
8 | 14 20 24 23 47 20 17 22 20 12 23 29 29 23 2 27 18 43
9 | 29 19 24 12 23 29 40 27 16 12 27 19 29 36 20 23 12 44
10 | 17 23 22 26 21 29 24 11 18 19 14 17 24 50 15 27 12 39
11 | 18 15 27 34 12 21 19 16 11 24 10 11 40 27 11 20 15 27
12 | 13 9 24 13 14 22 14 16 10 11 19 9 21 20 16 16 22 23
13 | 14 15 11 13 16 18 10 6 7 15 11 7 15 44 11 10 21 11
14 | 7 8 14 13 6 11 6 5 8 4 4 18 7 19 12 5 8 5
15 | 10 9 12 7 10 6 4 3 2 4 4 14 6 9 6 4 4 6
16 | 6 5 7 13 8 7 7 4 8 2 4 9 6 11 7 6 8
17 | 12 12 4 4 8 5 5 3 2 3 6 7 3 7 6 6 5
18 | 9 9 8 7 10 9 8 4 5 5 6 8 9 16 8 7 7
19 | 8 9 12 10 14 7 9 8 9 16 8 7 14 5 4 14 8
20 | 16 14 21 20 17 13 11 9 7 14 12 13 16 19 12 23 13
21 | 13 12 15 22 18 14 13 8 7 14 9 18 11 15 19 11 16
22 | 12 20 21 18 19 12 14 12 12 8 8 19 14 21 11 9 20
23 | 13 20 13 13 11 11 7 9 9 13 10 14 18 17 15 11 16
---+------------------------------------------------------------------------
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Note:
. the observations were stopped on March 18, for relocation within the same
building. Unfortunately, no suitable spot free of interference has been
found yet.
Pierre De Groote
---------------------------------------------------------------------------
Observer: Will Kelsey
Location: Santa Maria, CA. USA (120 26' 9" W, 34 55' 58" N)
Frequency: 107.9 MHz
Transmitter Location: Sacramento, CA. KXOA 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:
Overdense: 1.0 second or more
Underdense: less than 1.0 second
Each observed hour is 60 minutes, exactly.
__________________________________________________
March Over- Under-
1999 hr-UT dense dense Total
--------------------------------------------------
1 DLE 1100-1200 5 10 15
2 " " 4 17 21
3 PYX 0830-0930 3 10 13 20 min Tropo INT
4 " 0825-0925 4 5 9
5 " 0820-0920 5 19 24
6 " 0815-0915 4 8 12
7 1200-1300 9 16 25
8 1130-1230 7 11 18
9 " 4 10 14
10 LEU 0930-1030 7 10 17
11 " " 6 15 21
12 GNO 0915-1015 5 8 13
13 " " 8 11 19
14 " " 5 8 13
15 " " 11 18 29**
16 " " 10 17 27
17 " 0900-1000 7 12 19
18 " " 7 9 16
20 VIR 1145-1245 13 32 45**
21 " 1140-1240 12 30 42**
22 " 1135-1235 5 18 23
23 " 1130-1230 11 28 39**
24 " 1125-1225 8 15 23
25 " 1120-1220 10 17 27
26 " " 14 36 50**
27 " " 8 17 25
28 " 1115-1215 6 21 27
29 " 1110-1210 8 10 18
30 " 1105-1205 8 19 27
31 " 1100-1200 9 11 20
--------------------------------------------------
1999 hr-UT Over- Under- Total
March dense dense
Notes:
. activity period of streams with radiant at 45 deg elevation:
DLE: Delta Leonids
PYX: Pyxisids (Exploration)
LEU: Leonids-Ursids
GNO: Gamma-Normids
VIR: Virginids
**: Possible enhancement
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 53.76065 MHz, CW-R mode, 500 Hz CW filter, fast AGC.
Transmitters: 1) 30 kW TV video carrier from Bari, Italy, distance 700 km,
direction south and 2) a 30 kW TV video carrier from Sicilia,
Italy, distance 900 km, south. The total echo power of both
transmitters is processed into same 40 Hz virtual
receiver channel.
Observing method: automatic setup using FFTDSP42t software by AF9Y to record
the audio signal. 20 channels of 2 Hz width are used for meteor
identification, another channel is used for automatic
interference rejection. Sampling interval: one 4096
point FFT every 0.5 seconds.
The monthly results are now also available at http://www.qsldot net/oe8fnk
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.
| Mar 1999
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
---+---------------------------------------------------------------
0| 6 7 8 10 4 5 1 12 6 6 4 4 3 3 4 6
1| 8 6 5 2 2 1 8 12 4 0 7 3 0 4 8 3
2| 4 5 9 4 10 4 9 4 10 7 2 8 5 6 10 6
3| 6 5 6 8 4 3 9 6 9 4 9 7 5 4 5 4
4| 5 5 5 6 7 6 3 10 5 2 5 6 4 6 3 3
5| 1 11 7 7 6 10 7 5 3 5 4 12 4 9 10 8
6| 6 13 10 5 8 6 4 5 6 6 10 7 7 5 6 10
7| 9 6 4 5 13 12 4 10 4 10 7 8 5 8 3 7
8| 6 12 8 9 6 9 4 6 10 7 14 4 12. 6 8 11
9| 5 13 9 9 10 8 4 5 13 8 3 5 0. 6 11 10
10| 3 10 4 5 4 8 6 10 5 4 8 4 9 8 8 8
11| 8 7 12 6 6 7 6 10 8 8 2 3 5 4 6 9
12| 1 7 8 7 6 2 8 7 4 7 8 3 4 5 5 6
13| 4 10 11 8 11 2 3 12 5 6 7 2 3 4 6 4
14| 0 6 1 2 3 3 3. 3 5 2 3 4 5 1 2 9
15| 5. 4 0 2 1 2 4 3 4 2 1 2 1 2 1 5
16| 2 2 3 3 2 1 3 5 0 2 3 2 2 3 3 1
17| 1 2 2 0 3 0 1 0 1 0 1 2 1 1 4 2
18| 0 1 1 0 1 1 2 0 2 2 2 4 1 3 4 0
19| 2 3 1 2 2 6 1 1 2 1 2 1 3 1 4 4
20| 2 3 3 2 2 4 5 3 1 3 2 3 2 1 9 3
21| 4 5 2 4 1 1 3 3 1 4 1 5 2 1 1 4
22| 6 4 2 6 4 3 4 2 4 5 2 1 7 2 2 3
23| 2 5 1 0 0 5 2 2 3 0 2 2 7 3 3 1
---+----------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
| Mar 1999
| Mar 1999
UT| 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
---+-----------------------------------------------------------
0| 3 2 3 3 7 7 5 5 4 5 4 1 5 7 5
1| 10 5 7 12 6 5 7 10 8 10 5 1 3 5 7
2| 4 9 7 11 6 10 12 12 12 8 8 8 9 4 6
3| 7 2 7 12 6 2 6 7 6 7 5 8 4 2 6
4| 2 5 5 16 5 6 7 4 5 8 6 5 8 8 4
5| 4 9 10 10 15 7 10 5 13 6 11 7 11 2 3
6| 13 8 5 12 6 7 6 6 6 11 6 9 8 6 6
7| 6 8 9 8 6 5 7 17 7 6 6 5 9 8 11
8| 11 7 11 2 4 12 13 11 7 7 10 7 4 6 9
9| 6 7 10 7 13 10 6 4 11 8 7 8 8 6 6
10| 5 4 7 3 10 3 10 6 6 13 11 7 8 7 6
11| 4 8 11 15 4 12 7 5 10 6 14 3 9 6 4
12| 13 4 8 18 6 13 7 3 12 8 10 5 8 7 8
13| 9 6 3 8 10 14 4 6 4 4 6 4 6 7 2
14| 7 5 5 2 4 3 0 1 2 6 2 1 2 5 0.
15| 5 1 0 4 1 5 1 3 2 4 3 1 2 2
16| 0 1 3 2 3 2 3 1 1 5. 1 0 4 2 2
17| 0 4 7 2 6 2 0 2 1 1 0 1 2 1
18| 1 2 0. 2 1 1 1 2 1 2 2 1 1 0 1
19| 1 2 2 3 5 2 1 0 0 3 2 2 2 2 1
20| 3 2 1 0 0 1 3 1 2 1 2 3 4 4 0
21| 1 5 1 1 6 2 2 3 2 4 4 6 2 2 2
22| 3 0 3 3 1 1 2 5 4 2 2 4 4 4 2
23| 6 0 7 8 0 4 2 2 1 2 4 3 2 4 2
---+-----------------------------------------------------------
UT| 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
| Mar 1999
Propagation overview for March 1999
E : sporadic-E or E-layer propagation
F : FAI (field aligned irregularity)
- : propagation only via meteor echoes.
(blank) : no data available
| Mar 1999
UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
---+--------------------------------------------------------------
0| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
5| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6| - - - - - - - - E - - - - - - - - - - - - - - - - - - - - - -
7| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
8| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
10| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
11| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
12| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
13| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
15| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
16| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
17| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
18| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
20| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
21| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
22| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
23| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
---+--------------------------------------------------------------
UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
| Mar 1999
Notes:
. Nothing special to report during March 1999, just sporadic
meteor activity.
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
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
Total hourly counts
(interference manually deleted)
February 1999
Feb| UT
1999| 0h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
----+------------------------------------------------------------------------
1 | 0 0 3 1 7 0 0 0 0 6 4 2 0 3 3 3 10 13 11 5 27 9 3 6
2 | 5 1 1 4 3 7 2 1 1 3 2 2 3 4 4 1 2 3 12 0 1 1 0 1
3 | 0 1 0 0 1 1 0 0 0 0 0 3 0 2 2 2 10 0 0 0 5 2 4 10
4 | 6 4 9 5 5 10 4 0 1 3 3 2 5 3 3 1 0 6 3 5 16 6 3 2
5 | 3 0 0 1 2 4 2 0 2 1 4 5 4 1 9 3 9 10 11 7 37 17 6 5
6 | 6 0 7 7 7 9 5 2 3 5 8 1 5 3 5 6 7 11 18 7 10 6 6 7
7 | 8 7 31 11 5 2 2 4 5 2 3 4 3 5 2 6 13 14 15 14 4 4 7 20
8 | 0 6 5 3 15 8 3 1 3 4 1 2 3 4 2 22 14 10 8 2 2 3 1 3
9 | 5 3 0 1 0 1 2 0 0 1 7 6 6 7 6 3 8 12 6 7 9 4 3 10
10 | 7 2 5 5 6 3 5 2 2 3 6 4 7 5 4 6 7 13 9 4 4 6 4 13
11 | 2 0 2 3 6 3 2 3 3 5 4 2 5 2 4 5 13 12 7 1 2 4 5 4
12 | 5 7 5 7 7 4 3 1 5 2 3 3 2 3 1 5 9 11 13 5 4 2 3 2
13 | 3 3 7 3 0 2 3 3 2 4 0 5 1 1 8 6 6 8 4 3 3 4 3|25
---------------------------------------------------------------------------
14 | 29 19 25 28 33 31 21 13 22 18 17 19 29 18 27 25 28 29 29 38 22 34 26 22
15 | 26 6 8 10 11 10 11 5 7 2 3 5 1 0 3 8 5 3 0 23 16 15 27 27
16 | 27 23 31 8 23 25 15 20 12 11 16 17 13 11 10 15 30 2 10 17 18 25 13 33
17 | 17 18 16 23 24 21 14 20 16 8 16 12 18 9 12 22 41 34 28 29 21 36 67 26
18 | 38 45 41 24 31 16 18 16 10 8 20 16 16 13 17 22 26 30 21 22 19 20 16 15
19 | 20 11 6 10 23 19 14 12 10 16 13 16 17 16 5 2 12 39 29 21 32 25 9 1
20 | 11 7 13 15 13 19 20 16 11 13 7 11 9 13 13 3 0 6 8 12 2 3 7 3
21 | 3 15 28 16 19 13 19 11 14 8 5 1 2 9 12 20 37 28 26 19 28 27 28 21
22 | 29 17 23 24 29 9 12 23 12 17 16 14 14 18 23 26 35 42 59 35 45 22 28 32
23 | 28 31 30 13 22 20 17 22 15 13 14 15 12 16 14 32 30 32 22 18 29 11 23 27
24 | 14 10 24 18 17 17 8 22 15 9 16 13 22 17 19 33 32 32 34 25 25 15 17 30
25 | 15 29 23 25 21 14 11 12 14 14 22 14 23 22 21 31 16 18 20 19 14 16 16 25
26 | 20 21 25 19 20 14 15 12 16 9 14 14 9 18 19 21 36 33 28 23 18 20 17 15
27 | 17 14 21 13 18 17 16 17 15 11 10 9 7 9 7 12 20 28 24 5 2 21 24 19
28 | 25 14 29 12 18 11 12 16 15 9 10 7 19 13 13 17 34 28 29 13 18 18 22 14
----+------------------------------------------------------------------------
1999| 0h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Feb| UT
Signal duration distribution for the above period
Duration (s) Number
< 0.1 2461
0.1 to 0.3 1947
0.3 to 1 1450
1 to 3 1122
3 to 10 901
10 to 30 230
> 30 10
Notes:
. increased sensitivity from Feb 13, 23h UT, by better matching the
antenna-coax impedance.
R.B. Minton
---------------------------------------------------------------------------
Observer: Sadao Okamoto
Location: Damine Meteor Observatory, Japan (137.53 E, 35.07 N)
Transmitter: HAM beacon (JA9YDB) for RMO (50 W CW, 53.7500 MHz) by
JA9BOH Kimio Maegawa. No modulation except for identification.
Antenna: 2 element Cross Yagi 4 dBi aiming to Zenith. Omni-directional
in azimuth and elevation above 15 deg elevation.
Location: Fukui-NCT at Sabae city (136.2 E, 35.9 N)
At present time about 10 observers are listing for
Kimio Maegawa's 53.75 MHz beacon.
Receiver: IC575
Antenna: 2 element Yagi, pointed to the zenith.
Observing method: FFTDSP software, manual count.
Hourly echoes over 10 dB SNR
1999
Mar|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Mar|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14
UT
---+--------------------------------------------------------------------------
1|17 18 26 31 34 28 26 42 29 19 10 13 9 9 n n 7 4 2 10 10 21 21@20
2|26 16 21 25 27 24 37 21 27 20 20 20 18@21 n 8 5 8 4 3 8 18 20@31
3|26 15 15 34 19 23 20 30 33 23 16 9 n n n n n 5 4 2 13 15 22@30
4|27 25 20 39 36 32 33 30 28 25 14@13 n n n n n n 5 10 12 11 21@14
5|25 27 24 27 23 32 23 27 28 19 23 17 16 20 8 7 13 8 4 7 10 23 21@35
6|21 15 16 27 23 23 24 22 11 13 13 n n n n n n n 5 n 12 22 29@14
7|18 22 26 28 17 28 25 25 30 29 23 17 17 22 14 10 n n 6 13 5 15 19@28
8|18 29 33 23 35 23 29 32 22 28 21 20 10 17 12 10 4 1 @6 e@15 18 32@18
9|31 34 28 40 27 21 30 41 27 40 19 27 19 15 15 n n@10 2@20@16 19 23@23
10|23 27 23 29 21 27 21 28 36 26 30 27 14 19 21 n 4 5 5 5 7 16 21@36
11|30 28 37 25 22 24 29 28 30 29 25 22 17 23 11 12 10 @6 3@12@14 15 34@28
12|28 19 30 27 24 33 30 42 29 16 10 n 9 10 @8 n n n n n@12 23 24@25
13|23 28 21 39 30 26 30 26 18 21 21 23@12 21 n n e e n 8 n 19 27 --
14|22 36 23 29 23 30 25 30 30 16 20 10 14 11 12 8 4 7 2 4 12 24 28@35
15|17 36 36 25 15 23 23 28 32 21 21 23 18 12 n n n n n n 10 12 20@20
16|17 27 24 19 21 21 24 19 19 26 18 34@15 13 n 13 n n n n n@21 17@25
17|24 24 32 29 23 22 30 32 31 29 26 21 11 9 15@14 n @4 3 7 14 17 21@24
18|30 29 23 39 29 24 33 39 43 19 24 19 8 n 8 @8 n n 2 5 12 18 34 28
19|24 28 31 21 23 24 16 28 23 22 21 23 18 19 13 8 8 8 5 8 18 24 24@24
20|24 29 24 30 27 28 29 38 33 24 34 23 19 15 12 9 7 @6 2 11 12 23 27@35
21|26 31 25 24 24 34 28 35 31 21 26 23 19 20 n n n n@12 7 8 17 25@22
22|27 25 25 31 29 28 26 29 31 19 n n 12 11 7 @9 n n n 8 9 14 22@19
23|29 29 28 26 21 20 39 32 37 26 19 30 19 8 18 7 n 3 9 11 13 21 11@23
24|30 28 18 26 27 23 23 23 31 28 21 27 23 14 9 e e e e 6 13 18 26@18
25|33 30 21 21 28 35 24 25 25 30 24 31 19 12 13 14 n e e @5 16 14 24@20
26|24 25 20 20 32 22 31 27 25 31 32 21 15 19 19 @9 n @2 5 8 6 9 17 --
27|23 25 29 27 24 27 23 38@32 f f f f@18@18 e e e 1 6 10 20 30@31
28|27 31 20 32 28 30 38 36 20 9 14 10 12 6 8 5 5 3 2 2 5 8 18@20
29|16 22 20 28 19 29 21 18 18@21 n n n n n n n 1 n 4 12 25 18@26
30|28 29 21 34 24 30 32 33 39 29 19 19 23 29 23 11 n n 3 6 14 19 26@30
31|33 23 24 21 26 19 23 25 37 24 29 27 16 n n n n n 8 4 15 17 31@27
---+--------------------------------------------------------------------------
Mar|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
Mar|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
1999
Echoes with duration > 5 s
1999
Mar|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Mar|15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 UT
---+--------------------------------------------------------------------------
1| 1 1 3 1 1
2| 2 3 1 1 1 1
3| 1 1 4 2 3
4| 1 2 2
5| 2 1 1 1 1 1 3 1
6| 2 1 2 2 1 1 2 1 1
7| 1 2 3 1 4 2 1 1 1 1 1 1 1
8| 1 1 3 2 1 4 1 2 2 1 1 1
9| 4 4 2 2 4 3 4 4 1 2 4 1
10| 2 1 1 2 3 3 1
11| 3 2 1 1 3 2 2 1 1 1 1
12| 2 1 4 2
13| 2 1 2 3 3 2 1 3
14| 1 1 1 2 1 3 2 1 1 1
15| 1 1 1 1 4 2 1
16| 1 2 1 1 2
17| 3 1 2 2 1 3 1 4 1 3 1 1 1
18| 1 3 2 1 2 4 1 1
19| 1 1 1 1
20| 2 1 1 2 2 4 4 3 5 1 1 1
21| 1 1 1 1 3 1 2
22| 2 1 3 1 1 3 1 3
23| 1 2 2 3 3 1 3 2 1
24| 1 1 1 2 1 3 4 1 1
25| 1 1 3 2 1 2 1
26| 1 1 1 1 2 4 3 3 1 2 1
27| 1 2 5 5 1 1 2
28| 1 2 2 5 3 2 1 1 1
29| 2 1 1 4 2 1 1
30| 1 2 1 2 2 2 1 1
31| 1 1 5 2 3 1 1
------------------------------------------------------------------------------
Mar|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
Mar|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
1999
Daily rate of long echoes (T > 20 s)
1999
Mar 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----------------------------------------------------------------
Count 0 0 0 0 0 1 1 1 2 2 1 0 0 2 2
Mar 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
--------------------------------------------------------------------
Count 0 0 0 1 2 1 0 2 2 0 1 4 2 1 2 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.
e: contamination due to sporadic E opening.
f: no data available due to TX or RX failure.
JST = UT + 9 hours
Sadao Okamoto
2. ABOUT THE RMOB
The RMOB is an independent initiative of some workers in the field of radio
meteor scatter observations and data reduction. It started in August 1993 in
order to spread rapidly the Perseid results via E-mail. Since then, it has
appeared monthly, and it has gradually been expanded. In regularly publishing
summaries of observations, potential radio observers are kept up to date of
existing installations, possibilities and limitations of radio meteor
observations. In the long run, there should be sufficient observing stations
to cover the whole globe, allowing to detect stream outbursts which may
remain unnoticed visually.
RMOB contains typically: summaries of recent observations, equipment data,
first results of stream activity by radio methods, relations between radio
and optical meteors, references to other publications in the field of meteor
astronomy and radio scatter techniques, announcements of meetings, short
questions and answers, non-commercial (second hand) sale of radio equipment,
available software.
Contributors are mentioned, and interested persons are asked to contact them
directly.
RMOB can be copied freely in unabridged and unmodified form. Extracts should
indicate the source (Radio Meteor Obs Bulletin, month and year).
If you want to subscribe (or un-subscribe) to the E-mail distribution list,
please send a message to C. Steyaert.
Those not having access to E-mail can obtain a printed copy free of charge
from J. Van Wassenhove (current or back-issues).
3. ANNOUNCEMENTS
Martín Semegone is a member of the "Asociación Argentina Amigos de la
Astronomía (AAAA)" in Buenos Aires, Argentina and works in the Radioastronomy
department. They have formed a group to study meteors using the forward
scatter method, meeting every Saturday to study about meteors (currently
reading Meteor Science and Engineering by Dr. McKinley). They have made a
receiver, and are currently testing it.
You can contact them about following Win programs to collect data and
study meteor reflections:
- vismetig.exe (English version) displays and allows easy browsing of one byte
data stream files (such as the Prometeos format of the University of Ghent).
- gram.exe (Spectrogram 2.3, freeware by R.S. Horne) is a simple but efficient
FFT program reading .wav files.
R.B. Minton's FM radio meteor (RM) system went into full-time operation just
two days before the 1998 Leonids peak - after one and a half years of
tweaking the hardware and software. His software includes several features to
reduce slow-varying noise level, sporadic-E and aircraft flutter. The
original RM data are stored on disks.
He is currently the Acting Coordinator for the ALPO Instruments Section.
4. CONTRIBUTORS / USEFUL ADDRESSES
Enric Fraile Algeciras (EA3BTZ)
C/ Moianes 19-21 Esc. A 6º 1ª, E Barcelona
E-mail: EA3BTZ@mx3.redestb.es
http://www.redestb.es/personal/ea3btz (in Spanish)
Michael Boschat
6306 Cork St., Apt.512, Halifax, Nova Scotia, Canada
E-mail: andromed@atm.daldot ca
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
http://www.qsldot net/oe8fnk
Alastair McBeath
IMO: International Meteor Organization
12A Prior's Walk, Morpeth, Northumberland, NE61 2RF, England, U.K.
E-mail: via Chris Steyaert
R.B. Minton
Astrometric Observatory
568 North First Street, Raton, NM 87740, USA
tel: +001 (505) 445 7009
Sadao Okamoto
E-mail: okamoto@jim.sugiyama-u.ac.jp
Martín Semegone
Doblas 118 P.2, Dto. 3, 1424 Capital Federal, Argentina
E-Mail: juanmar@labint.frba.utndot edu.ar
Chikara Shimoda
178, Hario, Asahi-mura, Higashitikuma-gun Nagano, 390-1103, 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@vvsdot 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
--
Christian Steyaert (RMOB9903) 8 April 1999
--
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