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(meteorobs) Radio Meteor Obs. Bull. Aug 1998 2/2



---------------------------------------------------------------------------
Observer:  Will Kelsey
Location:  Santa Maria, CA, USA (120 26'9" W, 34 55'38" N)
Frequency: 98.5 MHz 
Transmitter Location: Sacramento, CA. KRAK, 50 Kw at 362 km.  
Antenna: Yagi FM 6 element. Heading North
Receiver: Sangean 803A
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
_____________________________________________________________________
August
1998     hr-UT     X-Dense     B-Dense   C-Dense    ESA    INT   Total
----------------------------------------------------------------------
 4CAP  1030-1130    1-0-0       1-0-1      4-4-6     29    None    17
 5SIA  1145-1245    0-0-1       0-3-3      3-5-5     60     "       2  
 6 "   1200-1300                5-5-0      3-7-7     48     "      27 
 7 "   1220-1320                7-1-0      6-4-0     56    Hi      18
 8 "   1200-1300    1-0-0       1-8-2      3-5-4     50    None    24
 9PER  1015-1115    2-0-0       3-3-5     6-10-8     49     "      37 
10PER  1015-1115    1-0-0       1-2-1      5-3-1     57     "      14
11 "   1015-1115    2-0-0       3-2-6      6-5-7     32    Lo      31
11 "   1400-1500    2-0-0       5-5-4      8-4-4     38    Lo      32 
12 "   1000-1100    1-1-2       5-8-9      5-6-9     59    None    46
12 "   1400-1500    3-2-0       6-4-9      4-5-6     64    Lo      39
13 "   1000-1100    2-0-2       6-6-7   11-10-11     47    None    55
13 "   1400-1500    0-1-1       0-2-3      5-5-3     65    None    20  
14 "   1000-1100    1-0-0       3-8-2      6-8-5     64     "      33   
15PER  1000-1100                1-4-1      3-5-2     56     "      16
16     1100-1200    0-1-0       1-3-4     4-4-15     33     "      32 
17       "    "                 3-3-3      5-7-9     40    None    30
18       "    "                 2-3-2      1-5-9     32    Lo      22
19       "    "     2-0-0       2-5-2      9-7-8     43    None    35   
20     1100-1200                1-1-3    4-10-13     47    Lo      32
21       "    "                 4-3-1      4-5-8     48    Lo      25
22       "    "                 1-3-1      4-3-1     54    None    13
23       "    "     0-1-0       6-4-5    10-9-12     47     "      47
24       "    "                 1-4-0      5-2-4     69    Lo      16
25       "    "     0-1-0       1-1-1      9-7-9     48    None    29
26     1100-1200                2-1-2      6-4-3     44    Med     18
27AUR    "    "     0-2-2       5-4-5    10-8-11     64    None    47
28 "     "    "                 5-3-1     9-16-9     56     "      43
29 "     "    "                 7-7-2    9-10-14     41     "      49
30 "     "    "                 3-4-4    10-12-8     46     "      41
31AUR  1100-1200    0-3-1       3-7-6    10-19-7     50    None    56
----------------------------------------------------------------------
1998     hr-UT     X-Dense     B-Dense   C-Dense    ESA    INT   Total
August

Notes:
 . activity period of streams
   CAP: Capricornids
   SIA: Southern iota Aquarids
   PER: Perseids
   AUR: Aurigids


      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 13 seconds, assumed to be overdense

    |   Aug  1998
  UT|  1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
 ---+------------------------------------------------------------
   0|  1   7   7   3      11   9   3   9   4   8   6  17   7   7
   1|  6   6   8   2      11   7   6   8   5  10   7  12   7   4
   2|  4   3   6   9       5   6   5   5  11   4  12   8   4   7
   3| 12   4  10   7       5   7   6   3  12   6  20  13  15   7
   4|  7   1   8   1       4   3   5   6   2   6  14  14  10   7
   5|  0.  3   4   5   2.  2.  4   1   6   3   9   7  11  10   5
   6|  5.  1   1   6   3   8   7   2   5.  2   3  13   5   7   4
   7|  4   2   3   2.  4   1   7   0       3   4  11   9   2   5
   8|  2   1   5           2   2   3       5   6  10  12   7
   9|  4   2   1   4   2.  0   6   4      13   9  18. 12   4
  10|  1   0   3   4   1   4       8       2   4   9  13   4
  11|  0.  1   2.  0   0   0   0.  6       1   1   3   3.  7
  12|  1   1       0   4   1   1   3   2.  3   2   5   4   5.
  13|  2   5   0   2   1   1   1   3   3   0.  0   1   1   0   2.
  14|  0   0   0   0   0   0   1   0   0.      3   6   3   2.
  15|  0   0   0   0.  0   0   3   0       2.     12   1   0
  16|  0       1   1   0       0.  0       0   1   5       0
  17|  0   2   0   0   2   0       0       0.  4   4       2
  18|  0   0   3.  0.  3   2.          0.      1   5   0.  1
  19|  0   0   2.  2.  1   2.      1   2.      2           0
  20|  3   0   1   0   3           1   3.  3.  0   4.      0   2.
  21|  0   2   3   1   0   4.  1   2   1   2   7  10.  4   6
  22|  5   8   1       2   5   7   2   0   3   5   8   7   1   0.
  23|  1  11   2       8   3   3   2   4  10   4   9   7   2.  2
 ---+------------------------------------------------------------
  UT|  1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
    |   Aug  1998

    |   Aug  1998
  UT| 16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31
 ---+----------------------------------------------------------------
   0|  7   2   2   5.  4   1   1       0   0   1   2   1   1   1   4
   1| 11   4   3.  5   3   4   1       1   0   1   2   1   1   1   2
   2|  8   2   5   1   1   1   1       1   4   0   1   3   1   2   1
   3|  6   2   2   5   4   3   6       1   4   4   3   3   5   3   4
   4|  4   3   4   5   2   6   3       0   3   1   2   3   1   3   0
   5|  2   1   2   4.  4   4   1   6   4   3   2   0   0   0   5   4
   6|  4   1   1       2   1   5   3   5   4   1   4       2   4.  5
   7|  3   1   5       2.  3   0   1   1   1   1   0   3   1   1
   8|  4   7   4.          4   1   3   1   0   3   1   0.  1   4
   9|                  0.  0   2.  0   2   0   0   0   0   1   3   0
  10|              1   0   0.  1   0.  0   1   3   3   0   3   0.  1
  11|          0   0   1   0.  4   2.  1   0   1   0   1   0       0
  12|      0.  3   0   1   4   1   0   0   0.  3   0   0   0   0   1
  13|  1   0   0   1   0.  1   0   0   0   0   0   0.  0   0   0   0
  14|  0.  0   0.  0   1   0   1   1   1   0   0   0   0   1   1   1
  15|  1   0       0       0   0   0   0   1   0       1   0   0   0.
  16|  0           0       0   0   0   0   0   0       0   0       0
  17|          2.  0.  0   0   0   0.  0       0       0   2.  0   0.
  18|  1       0.  0.  0   3   0.  4   0.  0.  0   0.  0   0   0.  0
  19|              1   0.  0.  0       0   0   0       1   0       0
  20|              0.  0       0       1   0   0           0       0.
  21|  1   0.      4.  0       1   2.  0   1   0   0       1       0
  22|  3   0       0.  2   2   0   1   0   0   0   1   0   0   1   0
  23|  2   2       2   1   3   3   2   2   1   1   4   1   1   0   1
 ---+----------------------------------------------------------------
  UT| 16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31
    |   Aug  1998


             Propagation overview for August 1998

    E : Sporadic-E or E-layer propagation
    F : FAI (field aligned irregularity)
    - : Propagation only via meteor echos.

    |   Aug  1998
  UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
 ---+--------------------------------------------------------------
   0| - - - -   - - - - - - - - - - - - - F - - -   - - - - - - - -
   1| - - - -   - - - - E - E - - E - - - - - - E - - - - - - - - -
   2| - - - -   - - - - - - - - - - - - - - - - -   - - - - - - - -
   3| - - - -   E - - - - - - - - - - - - - - - -   - - - - - - - -
   4| - - - -   - - - - - - - - - - - - - - - - - - - - - - - - - -
   5| - - - - - E - - - - - - - - - - - - E - - - - - - - - E - - -
   6| - - - - - - - - - - - - - - - - - - E E - - - - - - - E - - E
   7| - - - - - - - - E - - - - - E - - - E E - - - - - - - - - - E
   8| - - - E E - - - E - - - - - E - - E E E - - - - - - - - - - E
   9| E - - - E - - - E - - - - - E E E E E E - E - - - - - - - - -
  10| - - - - - - E - E - - - E - E E E - - - - - - - - - - - - - -
  11| E - E - - - E - E - - - E E E E E - - - - - - - E - - - - - -
  12| - - E - - - - - E - - - - - - E E - - E - - - - E - - - - - -
  13| - - - - - - - - - - - - E - - - - - - E - - - - - - - - - - -
  14| - - - - - - - - E E - E - F - - - - - - - - - - - - - - - - -
  15| - - - - - - - - E - - - - - - - - - - - - - - - - - - - - - -
  16| - - - - -   E - E - - - - - - - -   - - - - - - - - - - - - -
  17| - - E E - - E - E E - - E - E E   - E - - - - - - -   - - - -
  18| - - E E E - E - - E - - - - E -   F E - - - - - - E E - - - -
  19| - - E F - - E F - F - E E - E F   E E - - - E F E F E - - F F
  20| - - - - - F E - F F F E - - F F F E E - E - E F E - - F - E F
  21| - F - E - F - F - - F F - F F F F E E - E - F F - - - E - E -
  22| - - - E - - - - - - - - - - E E - F E - - E F - - - - E - E -
  23| - - -   - - - - - - - - - E - - - F E - - - - - - - - - - - -
 ---+--------------------------------------------------------------
  UT| 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031
    |   Aug  1998

 Notes:
 . no other correction except for "dead time" is used in the counts shown.
 . The Perseids showed just normal activity on August 12 and 13. 
   The first peak seems to have occured at  14h-15h UT on Aug. 12
 . The Sun (speaking of sporadic-E and FAI) is more active this time 
   than in last years, but left the meteor counts unaffected, except
   for the reduced observation time.
 . local time conversion: 2 hour ahead of UT (04h00 UTC is 06h00 local)
 . The above report is just a short version. Anybody interested in the
   full report, which is quite lengthy (with counts duration 
   distribution, total reflective time, fireball times, detailed 
   classification of each single recorded picture) is available by 
   e-mail (see below, useful addresses).
 . while the Perseids were at maximum on Aug 12 a spectacular fireball 
   with a visual magnitude of -12 showed up over Udine, Italy, which was
   also very well recorded at Ferndorf, Austria and Udine, Italy by 
   means of FFTDSP.  Time: 21h49m14s UT on Aug 12, 1998. A more 
   detailed report as well as the recorded spectrograms (29 kB) are 
   available by e-mail.


      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                                                                           
Aug| 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Aug| 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| 85 84 68101 85 69 61  e  e  e  e  9@27 -- 29  n 19 14 10 15 20 35 53@60
 02| 78 65 81 74101 71 55 63 32 38  n 21 15 19  9 17 19 22 14 13 24 41 53@71
 03| 60 71 61 85 70 54 86 43 30 35@24  e  e  e  e 23 12 19  e  e 18 24 37@60
 04| 66 71 72 62 83 73 57 40@31  e  e@12@30 30 13  5 12 10  9 11 23 28 52@67
 05| 61 74 70 77 79 71 60 46 36 25 20 25 22 21  n@13 14 10  9 16 17 40 68@66
 06| 70 57 70 75 76 66 59 46 26 32@24  e@20 34 26 17 18  8  9 23 21 37 42@49
 07| 59 70 51 61 72 75 67 33 44 30 20 29 36  e  e  n 14 21 20 19 15 28 40@46
 08| 73 71 65  f       
 09|  f
 10|  f                          f  e 22 25 26 17 23  e  e  e 10 18 31 38@52
 11| 56 63 53 85 80 81 75 56 42 30  e  e  e 27 18 13 16 17 12 17 19 26 42@49
 12| 55 64 67 75 82 73 72 52  e 27  e  e  e 29 19 17 17 17 16 12 27 32 59@85
 13| 98 76 93 88 92 83 95 68 43 40 21 21 29 35@16 24 13 19 20 16 24 34 55 --
 14| 67 69 67 92100 82 64 65 54 37 37 41 19 30 25 23 12 17 12@14@29 35 53@43
 15| 61 48 78 76 67 62 91 52@32  e 36  e@13 25 27 15 23 14 15 10 26 29 46@44
 16| 48 44 60 59 40 64 57@52  e  e  e  e  e 20 13 21 26@16 16 10 22 38 45 --
 17| 63 54 55 66 54 54 31 48 23 13 14 13 15 17 18 19@15  e 11 13 32 32 40@47
 18| 35 43 52 56 44 45 39 38 33 25 20 19 23 25  n 20@12 18 13 20 18 32 51@41
 19| 43 53 50 51 43 35 44 39 27 24 26 26 22 19 17  n  n@24  e 11 17 27 33@43
 20| 50 43 43 42 44 45 46 31 25 23 25 20 11 14 14 16 17 18 10 17 22 38 34@44
 21| 44 31 56 55 47 52 47 38 26  n 18 12 24 24 12 19 17 17  9 12 25 41 41@37
 22| 44 50 48 39 47 58 55 35 36 17 18 13 13 26 20 13 23 19 13 16 31 34 41@49
 23| 39 48 58 58 65 49 49 52 36 30 25  n@19 13 13 10 24 12  e  e 23 32 38@38
 24| 48 51 51 72 74 51 48 45 32 28 23 29  e 34 21 -- 18 17 16 13 19 37 43@46
 25| 39 38 41 44 40 48 54 30 33 28 21 17 24 29 19 18 17 15 14 15 21 32 42@37
 26| 42 56  n 54 42 39 46 28 36 39 33@35  e 36 32 22 32 17 12 21 16 23 35@38
 27| 43 52 46 57 51 42 57 39 37 25 32 32 28 26 18 22 16 13 11 15 21 32 44@31
 28| 42 41 51 56 49 52 37 39 43 19 30 24 26 18 15 22 18 13 15 19 24 32 40@37
 29| 46 42 40 61 53 44 55 37 44 35 23 33 23@27 26 30 22 16 17  9 32 29 39 --
 30| 41 40 44 58 61 58 49 52 47 31 21 23@25@33 17 23 21 17 23 10 22 23 39@42
 31| 43 48 53 54 41 56 58 48 31 31 20 16 26 26 15 23 12 10 16 19 15 21 42@41
---+---------------------------------------------------------------------------
Aug| 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
Aug| 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
Aug| 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23JST
Aug| 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|  4  6  7 10  9  3  5                 1                             3  2
  2|  2  7 11 15 20 10  1  4     2        3                    1     5  1   
  3|  4  6  8  7  6  4  6  3     3  1                 1  1              2  6
  4| 10  6  9  9 13 13  2  5  3           1  2  2                    1  1  4
  5|  5  4 14  8 11 15 12  1  2  3  2  4  1  3        1        1  1  1  2  3
  6|  5 10  7  7  8  6  5  5  3  3              3  1                        
  7|  4  6  6  5 10  7 10  3  3  3  3  3  1                 2        1  2  5
  8|  9 16  7  f                                                            
  9|  f                                                                     
 10|  f                                   2  1     1                 5  1  3
 11|  5  8  9 21 11 14  7 11  3  5              1  1  1  1              5  4
 12|  7 11 15 14 14 21 20 15     3              1     1              4  6@20
 13| 24 24 32 35 25 28 26 18 16 10  2     3  4     2     1        2  5  5 --
 14| 15 12 12 27 26 23 18 10 10  7 10  7     3  1  1                 2  1  3
 15|  5  5 13  9 18 14 13  9  7     3        1  3     1  2        1  1  4  1
 16|  4  3  3  9  5 17  7  8                 1     4        1        2    --
 17|  7  3  8  4  5  4  2  7        2        3                       1  2  1
 18|  4  3  4  2  2  3  2     1  2  1  2                                    
 19|  2     2  4  2  1  5  2     2        3  2  1        1                 2
 20|  3  6  1  2  5  4  3  3  1              1  1  1              1  1     1
 21|  2  4  3  2  2  5  3  2  2  3  1     2  2                    1  2  1  2
 22|  1  1  4  2  4  3  2  2  2        1     1     1     1        1  2  1  2
 23|  1  4  6  1  5 12  2  4  3  3  2  1     2  1                          1
 24|  1  3  3  5  3  4  3  1     4  1  1     1        1     1     1         
 25|  3  3  5  4  4  1  6  1  4        1  1  6           1           1      
 26|  4  3     3  3  1  2  3  3  3  3  2     2  3        1  2           3  1
 27|  4  4  4  5  2  3  3  8  1  3     3  1  2  1                    1  3  1
 28|     2  5  6  6  3  3  1  1  3  1  1  1  1  2  2        1  2     2     2
 29|  1  4  2  7  3  1  4  4  2  3  1  1  1              1           1  1   
 30|  1  5     4  5  4  7  3 11     2  1     1  1  2  1        1           2
 31|  2  1  3  2  5  4     1  2  1  2  1  2  1  1           1  1  2     3  4
---+---------------------------------------------------------------------------
Aug| 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
Aug| 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
 Aug    1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
-----------------------------------------------------------------
Count   5  12   7   7  13  13  17   f   f (4)  23  47  69  54  23 

 Aug   16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31
---------------------------------------------------------------------
Count  16   7   3   6   3   5   2   2   5   3   4   2   5   3   8   3 


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.
     Between Aug 8 and Aug 10 there were problems with the transmitter and
     no valid data were recorded.
     JST = UT + 9 h


      Sadao Okamoto / via Kimio Maegawa

---------------------------------------------------------------------------
Observer:    Ton Schoenmaker
Location:    Roden, Netherlands (06 26' E, 53 08' N)
Frequency:   77.257 MHz
Transmitter: Kielce, Poland; 100 kW, horizontal polarization
Antenna:     4-element horizontal Yagi, geographical azimuth 105 degrees (ESE),
             elevation 15 degrees
Receiver:    home-made convertor followed by Barlow-Wadley XCR-30 Mark II;
             total sensitivity 0.3 uV for 20 dB S/N, bandwidth 3 kHz
Observing:   rectified signal from 455 Khz I.F. recorded with a Servogor
             strip-chart recorder with a chart speed of 120 mm/hour

Because of the uncertain status of the Polish FM transmitters, possible new
transmitter candidates were investigated amongst the TV carriers of the East-
European band RIII. A more or less isolated carrier was found at 77.257 MHz,
probably a TV station in Kielce, Poland. It is a pity that the station shuts
down irregularly, although this shutting down is a good check on false
recordings.

The following table gives the uncorrected counts of signals stronger than
0.3 uV (column "A") and counts of signals lasting longer than 15 seconds and
peaking to at least 0.1 uV (column "B"). The counts of long lasting "B"
signals are a better indicator for the "new" peak around 12 August 15h UTC.

                         August 1998

      |     10    |      11    |      12    |      13    |
  UTC |   A    B  |    A    B  |    A    B  |    A    B  |
  ----+-----------+------------+------------+------------+
  03  |           |   26    5  |   17    4  |            |
  04  |           |   29    9  |   24   10  |   51   16  |
  05  |           |   23    8  |   26   16  |   52   22  |
  06  |           |   26    7  |   34   16  |   42   13  |
  07  |           |   24    2  |   26   10  |            |
  08  |           |            |   12    7  |            |
  09  |           |            |    5    6  |            |
  10  |           |            |   22    6  |            |
  11  |           |            |   13    6  |   46   10  |
  12  |           |            |   17    6  |   39    5  |
  13  |           |   20    2  |   17   14  |   26    5  |
  14  |           |   20    1  |   22   13  |   28    3  |
  15  |           |   19    1  |   26   16  |   23    3  |
  16  |           |   11    1  |   39   10  |   26    2  |
  17  |  27    2  |   24    3  |   34    7  |   21    4  |
  18  |  17    2  |   22    2  |   22   12  |   22    3  |
  19  |  19    1  |   21    4  |   35    8  |   21    1  |
  20  |  24    0  |   16    4  |   34    5  |            |
  21  |           |            |   42   16  |            |
  ----+-----------+------------+------------+------------+
  UTC |   A    B  |    A    B  |    A    B  |    A    B  |
      |     10    |      11    |      12    |      13    |
 

      Ton Schoenmaker

---------------------------------------------------------------------------
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.


 Aug  |  UT
 1998 |  11  12  13  14  15  16  17  18  19  20  21  22 | *(1) **(2)
------+-------------------------------------------------+-----------
   1  |  20  19  27  39  33  33  42  46  43  39  30  30 | 28.5  38.3
   2  |  12  27  30  49  36  44  40  38  37  36  28  25 | 33.0  34.0
   3  |  12  18  22  26  30  27  40  31  28  28  22   9 | 22.5  26.3
   4  |  16  18  30  30      37  43  35  37  31  26  20 | 26.2  32.0
   5  |  11  17  20  25  27  27  25  22  21  26  22  22 | 21.2  23.0
   6  |  10  16  23  22  26  35  34  42  35  30  25  25 | 22.0  31.8
   7  |  11  14  27  21  36  15  33  25  24  28  28  21 | 20.7  26.5
   8  |   8  16  19  22  24                             | 17.8
   9  |          13  21  29  27  13  24  24  30  17  16 | 22.5  20.7
  10  |   9  11  13  18  18  26  28  27  26  22  24  19 | 15.8  24.3
  11  |  10  17  12  21  31  33  30  41  38  41  25  26 | 20.7  33.5
  12  |  23  35  29  45  44  52  50  53  43  24  26  39 | 38.0  39.2
  13  |  16  20  30  27  29  36  43  38  39  37  26  25 | 26.3  34.7
  14  |  11  27  27  26  16  24  20  21  17  20  26  19 | 21.8  20.5
  15  |  19  12  28  22  27  25  26  34  34  35  22  22 | 22.2  28.8
  16  |  12  16  17  18      25  24  28  20          17 | 17.6  22.3
  17  |  11  18  22  24  20                             | 19.0
  18  |          17  18  13  24  22  20  25  20  23  17 | 18.0  21.2
  19  |  13  18  20  19  14  24  24  23  27  19  18  20 | 18.0  21.8
  20  |   8      16  24  24  21  18  23  21  19  21  15 | 18.6  19.5
  21  |  12  13  19  15  17  19  23  22  22  20  26  16 | 15.8  21.5
  22  |  16  22  22  21  11  19  15  19  15  16  16  16 | 18.5  16.2
  23  |  11  16  20  14  14  19  22  16  17  21  21  17 | 15.7  19.0
  24  |              14  16  24  19  23  22  28      18 | 18.0  22.0
  25  |  16  22  19  17  20  22  23  21  23  20  19  21 | 19.3  21.2
  26  |   8  22  19  15  21  27  20  20  22  20  19     | 18.7  20.2
  27  |   8  15  16  20  16  18  17  21  25  28  18  21 | 15.5  21.7
  28  |  13  16  16  18  19  19  25  38  18  21  27  22 | 16.8  25.2
  29  |  16  16  20  19  15  21  25  22  24  28  24  19 | 17.8  23.7
  30  |  14  18  14  15  14  13  11  21  14  21  16  19 | 14.7  17.0
  31  |  11  10  13  23  22  13  16  16  17  13  13  10 | 15.3  14.2
------+-------------------------------------------------+-----------
 1998 |  11  12  13  14  15  16  17  18  19  20  21  22 | *(1) **(2)
 Aug  |  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).


                   Perseids 1998

    Meteor counts in one hour intervals starting at:

       UT  | 11 Aug   12 Aug   13 Aug   14 Aug
       ----+----------------------------------
        0  |    230      691      775      823
        1  |    420      546      991      656
        2  |    421      483     1058      519
        3  |    498      476     1014      755
        4  |    319      584     1029      736
        5  |    351      586     1236      535
        6  |    457      849      768      856
        7  |    514      723     1067      689
        8  |    339      928     1328      628
        9  |    509      739     1243      450
       10  |    412      923      894      667
       11  |    379      650      730      323
       12  |    390      553      895      541
       13  |    404      882      494       Es
       14  |    284     1569      339      456
       15  |    209     1314      389      331
       16  |    163      962      339      233
       17  |    191      651      279      133
       18  |    227      957      289      242
       19  |    161      539      224      213
       20  |    360      720      532      268
       21  |    316      613      533      270
       22  |    396     1095      712      321
       23  |    447      683      744      428
       ----+----------------------------------
       UT  | 11 Aug   12 Aug   13 Aug   14 Aug


  . sporadic E on Aug 14


      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.daldot ca

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: jxpsky@neasedot net and jiangxph@public.wh.hb.cn
http://www.neasedot net/~jxpsky

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

Ton Schoenmaker
Meester Homanstraat 8, NL-9301 HP  Roden, Netherlands
E-mail: schoenmaker@server4.nfradot nl

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.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 home: oh5iy@sci.fi
http://www.sci.fi/~oh5iy/
Call: OH5IY, packet radio:  OH5IY@OH5RBG.#KVL.FIN.EU

--
Christian Steyaert                (RMOB9808)               7 September 1998
--