From: Kazuhiro Suzuki, Toyokawa City, Aichi, Japan
Date: Nov. 18, 1997

HRO Today   11/18/97   Nov.18  0h UT, 1997
Radio Meteor Data from Japan        Kazuhiro Suzuki
1997 Leonids in Japan

1997 Leonid meteors  were very active in Japan in the early morning on
November 18 LT (LT=UT+9h).   The Leonid meteor activities were detected
by monitoring forward-scattered meteor echoes of 50 MHz HAM radio wave
(JA9YDB, 53.7500 MHz, 50W, operated by Mr. Maegawa) at Toyokawa Meteor
Observatory, Aichi, Japan.
    Hourly rate of meteor echoes reached 80 at 19h-20h UT, Nov.17.  The
long continuous echoes(>20 seconds) remarkably increased to over 10
times of the usual during 17h-21h UT on Nov. 17,
corresponding the solar longitude of 235.5(2000.0 Eq).


----------------------------------------------------------------------
Parameters on HRO(Radio Meteor Observation using Ham)
///////////////////////////////////////
Parameters on HRO at Sabae Transmitting Station
Location       :  Fukui National College of Technology
                  Geshi-cho Sabae city 916 Japan (136.18 E, 35.93 N)
Station master : Ham Club of Hukui National College of Technology
                     Kimio Maegawa 
Power and mode :  50 W  Steady Carrier with FSK ID (JA9YDB) every 10
mimutes
Frequency      :  53.7500 MHz
Transmitter    :  IC706  with cooling fan and  Daiwa Switching Power
Supply
Antenna        :  2 element Cross Yagi 4dBi aiming zenith
                  Gain variation +-1dB azimuth and +- 3dB zenith +-70 deg.
///////////////////////////////////////
Parameters on HRO at Toyokawa Observatory
Observer:      Kazuhiro Suzuki
               HRO (Radio Meteor Observation using HAM)
Location:      Toyokawa Meteor Observatory (137.32 deg E, 34.81 deg N)
               Toyokawa-city, Aichi, 442, JAPAN
Transmitter:   JA9BOH 53.7500 MHz, CW 50 W
Antenna:       Dipole (height 7 m, to zenith)
Receiver:      IC-575 (ICOM)  USB  BW 2.5 kHz  53.7485 MHz
Transmitter location: Sabae (in Fukui pref.), about 150 km
               north north-west from receiving station.
Method of echo sampling: After image procedure was done by PC with FFT
 software, echoes(>10 dB(S/N)) were counted.
///////////////////////////////////////////////////////////////////
LT   00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
UT   15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14
-------------------------------------------------------------------
November,1997
13/  15 35 37 29 40 33 20 33 41 42 37 39 30 28 17 17 14 13 19 24 20 26 25@36
                     2                 1  1                             1  1
14/  29 34 36 37 45 39 39 37 43 33 39 25 28 30 24 21 19 10@15    14 28 23@36
               1  1     1  1  1                    1  1
15/  31 39 52 34 50 63 32 35 44 40 27 38 33 24 14 14@20@12 19 20 28 24 25@25
                     1     1        2     1                 1        1
16/  26 41 55 55 54 44 49 41 31 38@32 25 24 19 14 16 16 11 16@14 19 20 22@25
         1  3     1  3  1  2  4  2                    1                 1
17/  24 38 41 44 40 55 48 40 41 41 40 32 23 19 24 20 11 17  9 15 20 26 22@48
         2  5  1  3  2  5  7  5  3  4                                      2
18/  44 74 56 64 81 73 67 57
         6 13  7 13 15 14 12
///////////////////////////////////////////////////////////////////
 Notes:
upper/lower :hourly echoes over 10dB SNR / long (duration > 20sec) echoes
 @: Hourly rate estimated by effective observation time less than 60 min.
///////////////////////////////////////////////////////////////////


HRO Result in 1996
November, 1996
14/  28 36 37 33 35 31 37 38 28 28 21 20 23 21 20 17 13 16 15@18 21 28 32 29
                        2     1
15/  41 49 51 56 52 44 38 32 33 33 27 25 23 23 18 15 14 13 13@14 19 28 27 35
         2  1  2  2  3     1     2                 1
16/  34 46 48 60 35 46 41 30 37 29 29 19 25 17 15 18 14 16 14 16@21 25    25
      1  1  1  2  1  0  0  1  2  1  2  1  0  0  0  0  0  0  0  0  0  0     0

17/A:25 41 46 38 41 34 41 50 41 47 25 28 31 21 13 14 15 12 12@13@15 20 24 22
   B: 0  1  7  4  5  3  8 11 12 14  8  4  1  0  0  0  0  0  0  0  0  0  0  0
   C:01 11 40 26 34 23 80116124112 77 44 21  0  0  0  0  0  0  0  0  0  0  0

18/A:25 32 42 32 30 31 32 28 34 27 34 28 19 25 21 18 17 12 13@15@17 23 25 18
   B: 1  1  2  3  0  1  5  1  3  5  3  1  0  0  0  0  0  0  0  0  0  0  0  0
   C:07 07 13 22  0 07 51 03 19 30 25 03  0  0  0  0  0  0  0  0  0  0  0  0
///////////////////////////////////////////////////////////////////////