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(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.ac.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.dal.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@oma.be,  Pierre.DeGroote@rug.ac.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.innet.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

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Christian Steyaert                (RMOB9809)              10 October 1998
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