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(meteorobs) Radio Meteor Obs. Bull. Jan 1998: Quadrantids, no H-Bids (2 of 2)



 12        "         1-2-0      6- 6- 2    10- 2- 1     57      "     30
 13        "                    4- 4- 1     4-10- 9     38      "     32
 14        "         0-1-2      3- 4- 3     9- 3- 4     69      "     29
 15        "                    5- 4- 4     6- 8- 7     65      "     34
 16        "         0-0-1      5- 4- 4     7- 5- 2     57      "     28
 17        "                    3- 4- 2     4- 5- 1     68      "     19
 18        "                    1- 1- 3     3- 8- 4     65      "     20
 19        "         1-1-0      2- 1- 2     5- 1- 5     67      "     18
 20        "         1-0-0      3- 5- 2     3- 6- 2     68      "     22
 21        "                    4- 4- 4     5-10- 7     41      "     34
 22        "         1-0-0      1- 1- 5     2- 6-10     50      "     26
 23        "                    3- 2- 1    10- 5- 4     68      "     25
 24        "                    0- 1- 1     3- 1- 1     71     Lo-    07
 25        "                    2- 0- 1     0- 6- 9     77     None   18
 26        "                    4- 0- 3     3- 5- 6     48      "     21
 27        "                    2- 4- 3     8- 5-11     55      "     33
 28        "                    2- 3- 3     2- 3- 3     75     Lo     16
 29        "                    1- 2- 2     2-13- 8     32     None   28
 30        "                    7- 3- 3     7- 8- 1     69      "     29
 31    1300-1400     0-1-0      7- 2- 1     8- 1- 2     68     None   22


      Will Kelsey

---------------------------------------------------------------------------
Observer: Werfried Kuneth
Location: Ferndorf, Austria (13 37' E, 46 45' N)
Antenna:  3 element Yagi, direction south, elevation 65 deg
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 2) a 30 kW TV video carrier from Sicilia,
          Italy, distance 900 km, south. Both transmitters are processed
          within the 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.

 All 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.
 Data for less than 20 minutes observing time are not shown here.


 Counts of reflections longer than 6.5 seconds: assumed to be overdense.

    |  Dec  1997
  UT|  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26
 ---+-----------------------------------------------------------------------
   0|  8  11   4   6   9. 40   6   5   0   2   7   3   3  11   6   3   1   3
   1|  4   5   6   5      28   0   1   0   0   3   1   6   7   5   5   4   3
   2|  4   2   4  10      25   5   0   2   0   5   7   5   7  10   1   5   6
   3|  1   2   9   2  11. 48   1   4   0   2   2   2   4   7   3   5   7  10
   4|  5   4   4   4   8  35   0   2   4   1   5   1   0   6   8   6   7   4
   5|  4   2   0.  7   6  28   2   2   1   1   6   1   2  10   5   1   3   4
   6|  7   3   4   2  20. 20   3   0   0   2   6   5   7   7   5   4   4   5
   7|  2   1   2   3  11  12   2   2   1  13   4   8   1  17   4   6   4  15
   8|  1   2   4   8   3  11   3   3   1   8   4   3   2  12   5   6   6   0.
   9|  4   0   3   4   4   7   4   4   1   9   5   3   3  17   3   5.  4.
  10|  3   1   2   2   3   7   1   1   2   4   4.  7   5. 16.  0.      1
  11|  6   1   0   1   4       2   1   0   7   4   4.      8   1   0.  3.
  12|  3   0   3   1   4       0   3   0   3   4   0.          1   0.  2
  13|  0   0   0   2   1   1   1   0   0   1   3       1   5   1   2   0
  14|  1   1   1   1   3   0   0   0   1   3   1       0   1   2.  0   0
  15|  1   0   0   1   0   2   2       3.  1   2       1   1   0.  2.  1
  16|  0   0   0   0.  0   0.  0           0   0       1   5.      0.  3
  17|  1   0           0       1               0       0   0   0.      1
  18|  2   0       1   3       0               0       1   1   0   0   0
  19|  0   2   2       8       0               2       0   1   1   1   0.
  20|  1   1   3.  2  10  13.      0   0.      0.      1   5   1   0   0
  21|  2   5   7  15  22  11   1   2   0   0   0       3   1   2   0   0
  22|  6      15  13  45  14   5   0   2   1   5   3   3   0   1   1   1
  23|  5   5.  7  29  68  10   1   3   1   2   7   6   6   1   3   1   2
 ---+-----------------------------------------------------------------------
  UT|  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26
    |  Dec  1997

 Notes:
 . blank value means either few or no data available or interference.
   There was no sporadic-E and no FAI propagation during Dec 1-26.
 . Dec 13 and 14: Geminids meteor shower.
 . Dec 22: Ursids meteor shower.
 . Data from Dec 1 - 8 are available on request, but quite normal act.
 . local time conversion: 1 hour ahead of UT (05h00 UTC is 06h00 local).


      Werfried Kuneth

---------------------------------------------------------------------------
Observer       : Kimio Maegawa  JA9BOH
Transmitter    : HAM beacon (JA6YBR) (50 W Morse coded, 50.017 MHz) by
                 Miyazaki-University Ham Club.
        Antenna: 1 lambda crossed loop, Az Omnidirectional 20 m H
       Location: Miyazaki city (131.43E, 31.82N) NE-SW path 650km
Receiver       : FT655  with 600Hz IF filter
    Sensitivity: -150 dBm or lower, detect 3 dB galaxy noise variation
       Location: Ohno Observatory, Japan (136.5E, 36.0N) 180m ASL
        Antenna: 8 element Yagi(12dBi) 12m above the ground with no elevation.
Observing method:Automatic Duty Cycle measurement every minute by Audimate
                 software by Mr. Mallama of AMS above -130 dBm threshold.

Notes:
 . Duty Cycle Graph for Quadrantids 1998 can be found at
   http://www.fukui-nct.ac.jp/~kmaegawa/hro/98quada.html
 . Quadrantids peak occurred at around 06 to 08 JST on Jan 4.
   (21h UT to 23h UT on Jan 3 1998) based on my observation.
   The activity was better than those of Geminids and equal to Perseids
   maximum on Aug 13, 1996.
 . local time = JST = UT + 9 hours


      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.


 Jan  |  UT
 1998 |  11  12  13  14  15  16  17  18  19  20  21  22 | *(1) **(2)
------+-------------------------------------------------+-----------
   1  |  10  20  14  21  16  19  17  23  30  29  23  34 | 16.7  26.0
   2  |   9  15  10  15  23  25  26  29  38  38  27  35 | 16.2  32.2
   3  |  16  11  23  23  29  45  54  74  74  66  60  71 | 24.5  66.5
   4  |   9  12  15  15  15  16  36  27  36  33  33  26 | 13.7  31.8
   5  |   7  19  22  23  16  20  29  34  32  34  22  25 | 17.8  29.3
   6  |  19  20  16  18  19  23  29  27  25  29  40  28 | 19.2  29.7
   7  |  10  13  19  12  18  23  22  32  34  35  23  22 | 15.8  28.0
   8  |  13      21  18  21  21  32  27  30  26  25  19 | 18.8  26.5
   9  |  13  13  17  19  25  20  29  31  34  29  25  22 | 17.8  28.3
  10  |  12  17  19  16  19  34  30  30  30  23  16  22 | 19.5  25.2
  11  |  11  20  13  16  18  20  30  27  26  22  20  19 | 16.3  24.0
  12  |  13  13  14  22  11  22  17  25  21  29  24  23 | 15.8  23.2
  13  |   9  15  18  21  26  17  32  25  32  24  21  19 | 17.7  25.5
  14  |           7  12  25  25  29  30  36  27  18  20 | 17.3  26.7
  15  |  12  12  13  29  15  23  29  32  16  18  26  10 | 17.3  21.8
  16  |   7  14  18  25  20  22  31  32  22  26  22  14 | 17.7  24.5
  17  |  11  14  14  11  19  28  22  30  22  26  25  20 | 16.2  24.2
  18  |  20  17  17  19  21  24  14      27  21  18  26 | 19.7  21.2
  19  |  10  12  25  25  22  21  29  24  29  32  22  26 | 19.2  27.0
  20  |   7  13  17  15  21  20  26  35  21  28  18  19 | 15.5  24.5
  21  |   6  17  16  26  20  19  18  26  23  15  19   9 | 17.3  18.3
  22  |  12  18  20  20  19  27  19  26  16  24  23  18 | 19.3  21.0
  23  |   7  14  19  16  18  21  24  27  18  20  20  14 | 15.8  20.5
  24  |   8  18          23  16  26  27  29  26  23  19 | 16.3  25.0
  25  |  10  13  19  17  13  23          21  26  24  25 | 15.8  24.0
  26  |  12  21  19  28  23  22  20  25  21  24  20  19 | 20.8  21.5
  27  |   8  16  15  20  17  26  18  21  25  16  21  19 | 17.0  20.0
  28  |  11  17  18  21  20  25  24  23  29  23  20  16 | 18.7  22.5
  29  |   9  21  24  19  23  15  29  20  22  16  20  20 | 18.5  21.2
  30  |   8  12  13  15  25  23  31  21  15  17  24  15 | 16.0  20.5
  31  |  13   9  17  16  13  20  25  25  26  18  22  15 | 14.7  21.8
------+-------------------------------------------------+-----------
 1998 |  11  12  13  14  15  16  17  18  19  20  21  22 | *(1) **(2)
 Jan  |  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: 87.360 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 element Yagi with 4 dBd gain to SW, azimuth 45 deg (SW)
Data sampling system: threshold triggering, sampling rate 64 ms.
           Computer logs total hourly elapsed reflection time, number of
           threshold crossings for the hour, the longest time the signal was
           continuously above detection level for the hour.
           Data stored in the Compact MS-Soft format. Software for viewing
           available from FTP.FUNET.FI  pub/ham/vhf-work/mssoft43.zip (420 K).
           You can download the V5.0 software package from my homepage
           www.sci.fi/~oh5iy


   Meteor counts in one hour intervals starting at:

                   Quadrantids 1998

       UT  | 02 Jan   03 Jan   04 Jan   05 Jan
       ----+----------------------------------
        0  |    294      301      426      195
        1  |    293      302      449      251
        2  |    346      352      617      261
        3  |    294      431      574      289
        4  |    394      471      481      268
        5  |    288      481      366      210
        6  |    257      384      298      255
        7  |    309      472      272      235
        8  |    227      360      295      186
        9  |    449      484      225      216
       10  |    513      811      307      215
       11  |    411      907      278      252
       12  |    366      810      295      202
       13  |    324      774      253      205
       14  |    224      683      174      172
       15  |    184      592      140      137
       16  |    233      563      106      124
       17  |    195      488      154      116
       18  |    173      464      171      104
       19  |    203      548      161      148
       20  |    246      634      185      192
       21  |    274      633      200      188
       22  |    355      906      226      190
       23  |    287      545      209      168
       ----+----------------------------------
       UT  | 02 Jan   03 Jan   04 Jan   05 Jan


      Ilkka Yrjola

---------------------------------------------------------------------------
Observer : W.T. Zanstra
Location : Appingedam, Netherlands (6 51' E, 53 19' N)
Frequency: 72.11 MHz
Transmitter Location:
           Wroclaw (16 43' E, 50 52' N), Poland, 135 kW, distance 735 km
Antenna  : Yagi, 5 elements, geographical azimuth 108 deg (ESE),
           elevation 14 deg
Receiver : Bearcat UBC 177XLT Scanning Radio, sensitivity 0.3 uV
Observing method: listening


 Forward scatter observations of Hale-Boppids and Quadrantids in
 January 1998.

 Raw counts of reflections, corrected for dead time, during one
 hour intervals starting at:

      |   January  1998    |  mean sporadic background
  UT  |    02  03  04      |    during 1995 and 1996
  ----+------------------------------------------------
  00  |        40  40      |       81
  01  |        21          |       86
  02  |        31          |       90
  03  |        36          |       92
  -----------------------------------------------------
  09  |        28          |       73
  10  |        33          |       67
  11  |        32          |       60
  12  |        56          |       52
  13  |        52          |       46
  14  |        61          |       42
  15  |        49          |       39
  16  |        43          |       39
  17  |        31          |       40
  18  |        60          |       44
  19  |        37          |       50
  20  |        49          |       56
  21  |    34  54          |       62
  22  |    23              |       68
  23  |    24  61          |       75
  ----+-----------------------------------------------

Notes:

. the reason for the low rate of Hale-Boppids and Quadrantids,
  including sporadics, is an overall decrease of reflections of
  50-70 percent. Control counts until January 13 confirm this decrease.


      Wim Zanstra / via Ton Schoenmaker


2. ANNOUNCEMENT

Further to the observations of Wim Zanstra, Ton Schoenmaker communicates that
during his observation runs between Jan 1-3 1998, he noticed a sudden
decrease in number of reflections on Jan 1 at precisely 23h00 UT. This was a
permanent decrease, lasting the next two days. The frequency was 72.11 MHz of
Wroclaw in Poland.
"I suppose that Wroclaw stopped (or considerably reduced the power of) its
transmissions, and that the remaining reflections are coming from other
stations at almost this frequency. Probably this is related to the switch in
Poland from the 66-73 MHz to the 88-108 MHz FM band".

3. ERRATUM

Erratum in RMOB9711 (No. 52): heading of the third table of Leonid
observations of Peter Bus:

 "Total reflection time of long-duration reflections > 20 s
 in seconds during one hour starting at UT:"

   read:

 "Total reflection time of long-duration reflections > 7 s
 in seconds during one hour starting at UT:"


4. 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)

Eisse Pieter Bus
Groningen, Netherlands
E-mail: epbus@wxsdot nl

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

Ou Yang Tian Jing
Wu Han,Hu Bei, P.R. of China
E-mail: via jxpsky@neasedot net

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

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

Ilkka Yrjola
Jukolantie 16, FIN-45740 Kuusankoski, Finland
E-mail: upm20.ky.yrjolil@elvi.vtkk.fi
http://www.sci.fi/~oh5iy/
Call: OH5IY, packet radio:  OH5IY@OH5RBG.#KVL.FIN.EU

W.T. Zanstra
Spijkerlaan 13, 9903 BB  Appingedam, Netherlands
tel: +31 (0)596 625617
E-mail: via tonsch@nfradot nl

--
Christian Steyaert            (RMOB9801)               7 February 1998
--