Meteor Observation Bulletin No. 333 www.rmob.org April 2021 1. GLOBAL OBSERVATIONS Observer: Associazione Astrofili Veneziani "AAV" Planetario di Venezia Location: Venezia, Italy (12 22' E, 45 25' N) Frequency: 143.05 MHz Graves Receiver: Yaesu FT-817 Antenna: Yagi 6 elements Antenna Direction: elev 20 deg, azimuth 294 deg (W) Computer: Pentium + XP Observing method: Spectrumlab + Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h|102 112 120 122 99 127 120 99 116 69 87 63 84 60 70 1 |108 132 111 110 114 130 117 144 121 78 63 69 71 64 64 2 | 94 109 99 100 116 138 112 129 114 73 76 72 79 64 63 3 |102 97 95 97 93 109 100 112 101 54 61 67 63 54 68 4 |104 88 91 82 97 86 88 108 97 49 57 51 45 68 49 5 | 75 87 98 96 108 85 81 111 82 54 64 47 51 49 47 6 | 84 80 77 99 88 101 85 105 98 44 62 64 77 50 73 7 | 87 78 94 86 84 90 83 84 55 48 63 53 54 52 55 8 |101 101 77 90 93 86 106 98 56 50 41 61 53 51 49 9 | 82 88 100 94 72 91 80 97 42 42 46 51 34 38 39 10 | 73 71 81 82 82 95 82 83 38 38 34 38 49 30 30 11 | 73 65 72 77 68 79 74 96 24 40 31 27 40 33 29 12 | 68 55 55 83 61 71 60 45 19 30 28 28 29 38 20 13 | 52 60 61 47 62 61 46 50 25 31 23 21 31 14 19 14 | 42 45 46 34 43 37 48 33 19 21 23 18 23 20 19 15 | 24 41 35 38 39 30 37 37 16 13 16 13 18 18 20 16 | 28 23 30 22 28 34 23 36 16 15 12 12 17 36 24 17 | 40 20 31 24 23 30 25 34 14 18 22 21 12 12 18 18 | 37 33 31 22 34 30 30 23 19 11 22 20 24 16 11 19 | 40 27 40 34 35 45 45 40 41 30 32 22 15 23 24 20 | 34 65 52 72 50 50 57 57 39 32 29 28 22 36 32 21 | 59 64 70 58 68 74 60 81 41 59 36 39 43 41 45 22 | 74 90 85 87 84 92 78 67 45 47 36 51 45 51 68 23 | 97 94 104 109 121 107 98 87 46 59 51 59 68 59 56 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 62 62 75 64 78 83 68 69 71 72 105 51 66 1 | 60 61 64 77 75 61 63 70 64 81 60 71 75 2 | 56 65 68 81 56 62 85 83 73 59 50 64 65 3 | 46 60 50 48 47 49 55 56 63 46 51 47 54 4 | 65 55 62 40 70 53 88 76 65 69 64 55 61 5 | 59 51 63 66 45 66 58 63 73 80 75 62 68 6 | 64 76 80 62 50 60 95 86 86 81 80 65 67 7 | 68 68 67 49 52 59 70 67 80 57 70 78 69 8 | 53 45 49 55 60 56 63 54 50 49 61 53 9 | 34 39 34 33 42 47 53 43 42 43 41 53 10 | 34 35 38 25 32 30 37 46 59 42 41 40 11 | 29 30 29 27 26 25 25 31 36 27 29 34 12 | 21 36 19 21 28 22 31 34 31 23 36 36 13 | 26 30 23 30 27 45 27 28 29 23 30 21 14 | 32 25 19 21 24 46 16 22 36 18 25 21 15 | 14 14 28 20 16 21 20 17 21 28 18 26 16 | 10 16 13 14 27 11 22 24 14 21 19 12 17 | 19 24 19 21 19 11 12 21 20 14 16 12 18 | 22 18 12 24 18 16 25 21 20 25 19 20 19 | 27 17 25 28 23 27 15 34 33 29 21 25 20 | 35 31 36 34 39 39 27 42 32 40 39 51 21 | 37 36 37 52 39 39 48 52 32 38 41 40 22 | 48 54 41 45 48 58 53 54 54 47 52 51 23 | 71 60 69 56 54 57 47 70 64 61 65 54 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Note: . reduced GRAVES power since April 9, 8h UT. GRAVES refurbishment and retrofit ongoing (see also RMOB2006) Enrico Stomeo --------------------------------------------------------------------------- Observer: Salvador Aguirre Location: Hillo, Sonora, Mexico (110 57' W, 29 06' N) Frequency: 54.309 MHz Receiver: RTL-sdr Antenna: Moxon 6-Meter Antenna Direction: elev 0 deg, azimuth 340 deg Computer: HP 2.50GHz, 8GB RAM, Windows10 Observing method: Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 0 24 20 3 11 7 12 0 8 1 10 2 7 17 7 1 | 10 6 5 11 19 8 15 0 8 10 13 13 31 24 10 2 | 18 7 29 10 30 12 12 17 17 30 26 12 28 19 10 3 | 24 20 15 23 70 22 13 23 22 19 32 28 46 22 32 4 | 6 13 25 24 26 22 31 26 37 16 12 34 48 56 30 5 | 45 19 16 12 57 15 12 25 39 20 49 18 44 61 19 6 | 18 17 19 24 20 15 21 21 40 41 32 22 40 40 45 7 | 34 23 18 30 29 35 22 45 47 42 57 44 72 52 63 8 | 51 35 51 40 52 46 48 39 50 48 77 78 79 46 91 9 | 43 64 36 91 130 68 35 86 94 63 134 64 75 78 55 10 | 60 64 57 65 81 95 77 67 68 57 76 61 83 103 68 11 | 44 56 55 163 46 74 57 81 69 139 81 96 136 121 98 12 |146 75 126 273 169 131 117 172 70 200 139 126 303 182 176 13 | 84 129 165 191 151 115 52 125 66 158 108 119 153 101 210 14 |112 90 110 180 165 111 111 137 88 224 123 159 95 130 208 15 |149 146 121 267 184 110 63 110 69 104 59 71 92 114 116 16 |210 143 79 164 79 90 45 117 75 152 59 85 51 53 137 17 | 95 87 91 100 150 92 42 115 48 96 124 78 91 62 93 18 |149 55 125 127 89 253 84 79 68 117 112 44 64 58 122 19 |149 92 98 98 119 73 107 97 47 124 92 144 69 70 57 20 | 77 41 54 48 123 87 99 86 46 111 46 49 44 60 60 21 | 88 0 82 64 25 55 25 59 33 62 92 61 36 42 37 22 | 44 41 38 32 36 28 59 67 24 31 38 20 22 18 52 23 | 13 36 35 7 24 15 9 21 14 27 18 5 12 5 45 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 0 21 26 5 16 4 12 18 59 17 23 29 45 31 6 1 | 0 16 7 10 17 11 13 12 15 17 8 11 14 18 23 2 | 0 9 17 0 24 30 17 91 11 17 12 11 32 31 32 3 | 0 16 9 21 7 39 7 7 16 33 15 10 30 45 41 4 | 0 31 11 16 15 91 16 20 12 43 18 22 26 29 32 5 | 0 6 43 14 39 87 14 13 16 62 25 23 76 41 61 6 | 0 25 63 29 41 113 36 58 29 54 23 32 61 36 28 7 | 0 118 50 14 38 80 109 36 39 63 27 74 67 51 52 8 | 0 36 59 26 85 67 78 32 71 92 33 98 98 80 71 9 | 0 58 60 31 80 69 46 75 36 96 24 158 78 134 157 10 | 0 76 70 42 114 63 44 35 26 126 43 104 104 75 130 11 | 0 66 166 77 145 101 172 77 44 116 124 160 179 177 60 12 | 0 5 144 89 149 243 165 20 61 297 50 84 172 241 13 | 0 121 155 91 94 0 163 145 54 163 243 89 235 137 14 | 0 76 142 100 69 0 171 155 140 241 169 170 88 107 15 | 0 77 71 136 39 275 105 125 126 199 70 108 199 80 16 | 0 60 55 85 106 42 66 93 66 171 48 234 50 54 17 | 0 73 51 67 116 60 31 53 4 175 162 52 82 72 18 | 0 68 68 45 120 109 53 81 0 132 85 101 78 387 19 | 0 94 90 70 84 82 47 103 73 107 124 97 119 84 20 | 0 42 58 49 97 77 26 96 112 86 83 98 92 120 21 | 0 78 47 53 60 54 19 56 69 93 40 39 67 103 22 | 0 45 43 19 80 37 13 36 37 70 22 46 44 81 23 | 25 29 22 10 47 22 9 34 26 38 22 17 0 31 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Salvador Aguirre --------------------------------------------------------------------------- Observer: Mario Bombardini Location: Faenza, Italy (11 54' E, 44 17' N) Frequency: 143.05 MHz Graves USB Receiver: YAESU FT-857 Antenna: DIAMOND A144S5R Antenna Direction: elev 20 deg, azimuth 300 deg (NW) Computer: ASUS P5KPL-SE win10 Observing method: Spectrumlab + Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 61 64 85 53 55 78 61 70 69 40 46 26 59 35 27 1 | 73 78 78 78 63 96 76 80 81 43 48 47 59 41 22 2 | 75 70 99 89 62 87 70 75 76 44 53 38 67 47 29 3 | 77 87 79 74 72 77 74 74 88 42 33 45 47 43 17 4 | 54 68 65 60 65 70 51 60 68 33 27 41 50 28 26 5 | 68 62 82 73 69 63 46 51 60 28 37 38 43 29 15 6 | 69 60 82 64 62 68 57 59 78 47 33 40 49 37 17 7 | 61 70 75 57 64 70 68 69 71 40 29 35 46 35 29 8 | 68 78 82 69 58 67 72 68 48 25 26 51 48 32 28 9 | 77 71 79 77 64 73 76 69 29 30 24 50 35 31 33 10 | 86 78 82 81 79 86 85 50 31 23 22 28 38 26 31 11 | 77 81 76 86 79 61 70 84 24 25 20 27 36 21 24 12 | 78 72 71 77 59 57 71 80 20 31 20 19 41 12 14 13 | 56 68 65 66 72 65 62 57 25 27 17 16 26 21 10 14 | 50 42 53 56 58 60 59 51 21 19 11 17 29 12 24 15 | 34 33 40 43 47 39 40 39 25 19 8 11 17 10 13 16 | 32 36 20 23 35 31 32 31 16 6 9 14 61 16 12 17 | 20 17 19 20 19 27 22 25 10 16 5 17 18 10 11 18 | 25 20 28 16 19 16 20 28 11 8 3 8 13 9 4 19 | 12 22 12 16 26 17 23 27 12 9 11 14 14 7 11 20 | 20 25 25 20 21 18 19 15 19 21 23 21 11 16 17 21 | 20 28 33 39 33 21 28 36 31 24 27 29 17 25 20 22 | 37 36 50 44 51 33 40 45 24 36 30 39 34 17 19 23 | 43 54 56 45 58 42 51 43 34 35 30 59 34 37 37 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 33 39 35 45 41 48 52 38 47 43 44 41 51 58 50 1 | 38 40 55 38 43 45 65 45 35 50 51 46 54 53 45 2 | 29 40 47 49 46 35 51 44 62 57 45 68 58 42 63 3 | 36 34 59 42 40 43 56 41 38 49 47 49 46 34 44 4 | 27 25 41 37 50 35 40 51 30 38 37 68 45 47 48 5 | 28 32 54 45 47 32 40 32 48 59 43 59 59 64 62 6 | 28 33 41 47 47 43 44 61 49 51 53 78 54 46 63 7 | 36 52 40 53 43 38 48 44 45 53 49 48 59 57 67 8 | 32 38 42 31 33 54 40 44 52 44 54 60 40 47 61 9 | 27 34 39 47 40 44 53 38 42 41 38 45 40 49 41 10 | 28 20 37 37 36 43 37 32 43 38 35 32 40 36 43 11 | 25 28 26 26 18 29 34 23 36 34 55 30 27 34 33 12 | 24 27 16 15 43 39 29 31 27 36 36 20 34 33 32 13 | 23 11 16 27 30 29 37 21 26 23 42 55 37 37 33 14 | 27 20 14 24 25 22 29 58 21 57 30 26 22 27 27 15 | 16 19 20 18 16 22 23 28 20 24 17 19 55 31 23 16 | 11 22 9 11 15 18 17 12 21 23 37 18 22 18 25 17 | 17 14 12 14 16 13 9 15 47 15 13 26 19 14 22 18 | 18 15 9 8 21 22 7 19 11 13 23 8 13 21 22 19 | 12 15 14 18 14 23 11 19 23 19 17 11 6 29 20 20 | 13 11 18 28 19 20 9 20 27 17 15 23 12 28 22 21 | 31 29 35 37 20 25 19 30 26 33 23 31 25 26 40 22 | 29 32 30 36 29 36 29 35 28 30 31 32 38 34 57 23 | 25 37 26 34 41 40 36 42 51 48 41 34 28 44 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Mario Bombardini ---------------------------------------------------------------------- Observer: Michael Boschat Location: Halifax, Canada (63 36' W, 44 36' N, 60 meters above sea level) Listening Frequency: 77.251 MHz Receiver: Icom R-20 Antenna: resonant dipole Antenna Direction: Horizontally polarized to 250 deg with lobes in N-S plane, elev 0 deg Filter: high-Q (Q at least 300) bandpass filter between antenna & receiver. Listening Mode: CW Recording method: Viewing Spectrumlab on laptop and listening by ear Number of meteors heard in one hour interval | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 11h| - 18 26 13 - 26 16 38 28 2 23 42 31 30 40 12 | 18 16 27 14 - 18 18 - 17 0 24 28 18 25 - 13 | 24 12 24 8 18 - 14 - - 0 28 27 38 43 - 14 | 25 14 37 17 36 - 20 28 - 12 30 37 - 32 25 15 | 36 - - 20 22 - - - - 50 31 32 - 50 28 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 11h| 50 22 50 40 25 63 75 34 38 31 36 42 38 33 43 12 | - 25 33 20 37 27 45 60 32 25 25 36 38 28 31 13 | 24 40 30 20 - 30 61 42 26 31 31 44 36 13 30 14 | 52 60 38 30 18 16 54 50 30 50 25 18 20 19 30 15 | 68 30 33 16 30 27 62 36 40 33 38 24 18 12 28 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Notes: . moved to new location, radio rates down . Unknown strong tone appeared March 7, 2017, trying to find solution as rates dropped. I have no idea what the problem is, if it is that tone destroying my reception or a problem with the notch filter. . did not get one reflection at all from the Arietids or Zeta Perseids!! . no corrections for radiant position made to the counts. . ( - ) means no observations made. . Zero (0) is actual number meteors not heard/seen per hour! . Broke notch filter repaired and now seems I may be getting better reflections. Mike Boschat ---------------------------------------------------------------------- Observer: WHS Essen Location: Essen, Germany (6 59' E, 51 24' N) Frequency: 49.990 MHz OT1KZG Transmitter: VVS beacon at Astrolab IRIS, Ypres, Belgium (2 54' 45" E, 50 49' 03" N), 50 W, carrier (no modulation), LHCP, upward beaming Antenna: 6m Turnstile ON4ZK, elev 45 deg, azimuth 240 deg (SW) Pre-amplifier: Bandpass 49.9 MHz, SSB LNA600 Receiver: FunCubeDongle Pro+ Observing method: Spectrumlab, Colorgramme RMOB Lab v 2.5 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 20 11 19 21 28 16 33 25 32 14 12 24 20 21 34 1 | 28 20 13 24 28 15 33 29 31 18 12 27 25 27 29 2 | 17 26 26 23 26 14 26 20 24 11 8 22 22 24 19 3 | 17 21 27 14 17 14 28 30 26 7 14 29 21 26 29 4 | 20 20 18 30 16 7 17 20 23 11 15 31 21 15 19 5 | 20 24 21 15 15 24 20 22 23 18 14 24 15 31 12 6 | 14 18 28 21 25 13 14 28 23 14 13 18 27 35 24 7 | 26 16 31 38 12 11 17 27 27 19 11 25 25 25 20 8 | 22 17 20 19 14 17 11 20 29 23 9 24 26 23 27 9 | 10 20 13 19 22 9 12 16 19 15 5 17 17 13 18 10 | 8 9 10 14 13 13 18 17 14 18 9 18 10 15 10 11 | 9 14 7 11 10 10 15 15 16 11 17 9 14 15 10 12 | 3 8 9 12 10 5 7 15 10 7 11 13 16 8 8 13 | 5 5 11 14 13 10 11 7 8 7 14 10 9 12 6 14 | 13 11 14 9 9 4 7 8 11 9 7 15 8 13 11 15 | 11 13 11 15 5 6 11 11 10 7 15 14 8 11 6 16 | 6 7 6 8 6 12 6 12 7 12 17 9 5 7 10 17 | 4 11 7 6 3 2 6 10 10 7 5 4 11 11 6 18 | 13 8 12 8 2 6 5 20 14 5 8 14 6 10 12 19 | 8 13 12 11 6 13 14 15 14 6 13 16 10 20 14 20 | 17 18 17 24 9 19 12 12 16 21 11 14 19 18 21 21 | 17 13 16 23 16 20 14 24 20 23 16 14 15 21 24 22 | 19 25 17 21 14 25 24 24 9 13 30 24 19 30 20 23 | 25 16 19 24 22 23 25 27 9 9 20 20 24 26 33 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 22 29 29 24 26 24 31 23 20 26 17 20 13 18 24 1 | 32 36 29 23 20 20 22 27 24 16 20 27 19 19 20 2 | 23 18 24 25 20 30 28 31 22 20 21 18 15 24 19 3 | 26 34 27 7 28 14 20 31 14 26 23 18 21 17 17 4 | 33 29 14 9 27 29 26 29 21 24 27 24 20 14 33 5 | 25 27 30 5 28 25 21 23 30 20 24 22 17 34 31 6 | 22 15 25 14 29 20 31 26 36 22 28 29 36 21 33 7 | 34 26 28 23 30 32 28 26 29 29 26 25 28 33 35 8 | 27 18 35 26 12 15 25 23 17 16 28 31 22 29 34 9 | 18 18 19 17 16 15 22 22 27 20 17 25 23 29 12 10 | 18 21 19 9 5 12 19 13 14 11 16 16 11 14 8 11 | 15 16 10 14 12 17 11 10 17 19 9 12 12 14 11 12 | 9 17 10 8 14 15 8 12 11 12 12 11 6 9 11 13 | 11 10 16 13 8 10 13 7 7 18 6 11 12 16 7 14 | 13 15 16 15 14 6 11 13 20 13 11 9 12 9 20 15 | 11 11 4 8 5 16 8 10 20 11 8 17 11 15 13 16 | 13 9 22 7 8 8 14 10 14 11 7 12 12 9 8 17 | 11 6 7 7 6 14 4 17 15 14 11 12 14 5 17 18 | 7 7 11 10 11 8 15 13 7 14 9 13 10 5 5 19 | 13 13 12 9 12 17 14 9 8 13 6 7 19 8 16 20 | 17 17 20 13 16 10 20 19 16 12 10 10 7 17 11 21 | 17 20 23 32 12 21 26 23 14 21 19 17 14 15 22 22 | 25 26 20 20 28 22 22 21 15 16 19 23 14 22 23 | 20 28 27 29 22 39 22 25 16 29 20 17 20 18 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Jochen Plessmann ---------------------------------------------------------------------- Observer: Kees Meteor Location: Kattendijke, Netherlands (3 57' E, 51 30' N) Frequency: 143.05 MHz Graves Receiver: RSP2pro Antenna: dipole Antenna Direction: elev 0 deg, azimuth 180 deg (S) Observing method: HROFFT + Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 2 0 2 2 1 3 0 2 1 0 0 1 1 | 1 2 1 2 1 2 0 3 6 1 1 2 2 | 2 1 1 5 2 3 0 3 5 1 2 4 3 | 3 3 2 1 2 7 0 3 4 0 2 2 4 | 2 2 2 2 4 0 0 2 2 2 3 0 5 | 2 4 2 2 7 1 0 4 2 2 2 4 6 | 3 3 3 4 1 3 0 1 1 0 5 2 7 | 2 5 4 0 1 8 0 7 5 3 5 1 8 | 1 8 1 4 5 1 0 6 3 2 9 7 9 | 1 2 3 1 3 5 0 2 11 4 2 3 10 | 0 4 3 6 0 2 0 4 3 5 3 3 11 | 2 2 1 2 2 3 1 11 3 3 2 3 12 | 2 4 2 3 3 2 4 2 3 1 2 5 13 | 4 4 2 5 2 5 0 1 3 1 3 14 | 1 2 1 0 2 2 1 2 2 2 3 2 15 | 4 1 3 0 3 3 3 2 2 6 1 3 16 | 2 1 1 0 6 1 2 2 2 2 7 1 17 | 3 4 1 1 0 0 2 0 0 1 0 18 | 0 1 0 0 2 0 3 2 0 1 2 19 | 0 2 0 0 1 0 1 3 0 0 0 20 | 0 0 2 0 0 0 0 4 0 3 3 21 | 1 2 1 1 1 0 6 4 2 1 0 22 | 1 0 1 1 1 0 3 2 1 0 1 2 23 | 2 2 0 2 0 0 0 5 0 2 1 3 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 0 3 0 1 2 2 7 3 0 8 4 3 4 4 1 | 2 0 3 2 0 1 8 4 6 1 2 4 0 0 2 | 2 0 4 2 2 2 7 3 4 4 3 0 6 2 3 | 2 1 2 2 1 2 6 8 4 6 10 1 2 1 4 | 4 3 2 1 4 2 6 15 3 5 0 0 3 5 5 | 2 0 8 2 11 9 4 11 6 10 3 2 8 1 6 | 3 3 4 1 6 4 8 1 4 7 2 1 3 4 7 | 0 7 6 4 1 8 7 8 10 9 7 4 4 5 8 | 2 3 1 1 6 9 7 11 6 5 6 5 9 4 9 | 1 2 7 3 3 5 5 11 4 11 5 3 6 2 10 | 5 3 10 3 3 5 9 7 4 3 2 4 6 3 11 | 5 4 3 3 3 1 7 5 6 2 4 2 4 6 12 | 6 9 4 1 2 6 6 4 6 6 2 0 5 2 13 | 2 3 4 6 2 3 7 7 3 1 2 2 5 3 14 | 1 7 1 1 2 2 2 6 1 2 1 1 0 15 | 1 2 2 1 6 2 4 5 0 2 3 2 2 4 16 | 1 3 0 1 6 2 3 1 4 3 1 1 0 1 17 | 1 1 1 3 6 3 3 2 2 3 1 10 1 3 18 | 1 0 0 0 6 1 1 1 1 4 3 6 0 2 19 | 2 0 1 0 6 3 2 0 1 3 2 6 0 20 | 0 1 0 3 3 9 0 1 2 1 7 0 21 | 0 1 2 0 0 2 4 3 0 5 2 1 1 22 | 2 3 4 1 0 2 4 3 3 2 3 2 1 23 | 1 1 0 0 2 2 9 2 9 6 0 4 2 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Kees --------------------------------------------------------------------------- Observer: Fabio Moschini Location: Rovereto, Italy (11 00' E, 45 52' N) Frequency: 143.05 MHz Graves Receiver: Yaesu FRG-9600 Antenna: Yagi 4 elements Antenna Direction: elev 20 deg, azimuth 294 deg (W) Computer: Pentium Win7 Observing method: Spectrumlab + Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 69 55 5 5 41 42 50 44 12 16 22 26 16 16 1 | 69 55 64 52 41 78 41 55 17 12 22 25 10 34 2 | 72 65 60 65 47 63 44 41 17 19 26 21 14 22 3 | 56 78 52 45 53 75 49 40 15 25 18 25 16 22 4 | 80 72 6 41 32 59 39 43 31 17 19 20 19 19 5 | 74 48 1 32 38 49 35 41 33 24 22 23 23 28 6 | 65 39 38 50 46 39 38 27 9 18 19 25 22 20 7 | 64 52 31 35 42 45 32 26 13 18 18 25 21 20 8 | 48 47 45 49 36 68 33 16 22 21 24 20 19 9 | 30 38 62 11 34 72 41 17 26 20 13 16 14 10 | 45 59 68 46 45 71 40 15 17 16 32 31 42 11 | 45 52 73 49 46 58 41 13 25 18 40 22 26 12 | 42 59 58 55 52 43 39 23 23 15 23 12 13 13 | 55 39 57 46 45 54 44 19 18 13 29 12 16 14 | 49 45 38 46 46 40 37 14 15 16 28 12 9 15 | 47 50 40 46 34 31 39 9 12 9 25 12 12 16 | 31 40 29 30 29 28 41 8 9 15 9 11 16 9 17 | 31 48 43 19 19 30 25 12 9 4 16 12 22 10 18 | 32 66 36 21 21 22 23 9 5 7 12 15 8 14 19 | 23 1 33 20 18 28 16 6 9 5 11 8 15 7 20 | 19 57 28 17 34 32 19 14 13 10 14 11 12 7 21 | 30 45 29 22 53 37 26 9 16 18 21 14 25 12 22 | 25 60 27 21 52 30 26 15 13 16 14 16 17 8 23 | 33 45 44 38 45 37 40 11 13 13 18 9 20 14 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 17 23 18 15 26 21 12 17 24 23 22 23 22 21 25 1 | 13 16 20 26 25 28 16 29 19 32 18 27 33 28 37 2 | 17 23 21 25 27 25 26 17 27 21 25 42 29 43 17 3 | 17 26 17 17 21 12 29 21 21 20 24 36 21 42 30 4 | 14 23 12 20 23 33 20 21 22 14 19 33 20 37 27 5 | 21 21 22 22 19 16 37 29 22 30 35 26 24 25 33 6 | 19 22 25 20 18 23 17 22 31 31 26 25 33 32 30 7 | 18 20 17 14 23 28 25 31 27 24 14 34 26 29 28 8 | 13 16 13 12 25 34 22 19 24 28 19 38 21 23 28 9 | 13 17 25 15 23 34 34 21 13 25 17 30 24 28 23 10 | 15 15 26 14 21 19 25 18 26 18 16 22 25 33 13 11 | 20 13 21 17 20 17 19 18 28 20 29 28 20 29 23 12 | 17 16 21 14 26 20 18 22 23 21 12 45 24 47 26 13 | 10 22 24 19 20 25 25 16 16 24 23 38 21 11 22 14 | 14 13 17 11 15 16 23 20 16 20 21 20 19 21 35 15 | 59 12 25 16 22 44 20 35 18 14 20 26 28 31 19 16 | 13 7 15 27 15 17 20 18 16 14 44 25 20 21 21 17 | 7 15 14 13 11 9 20 29 12 22 13 22 17 14 9 18 | 11 7 7 13 7 15 14 18 13 11 22 25 18 15 15 19 | 13 7 7 9 13 8 16 21 12 13 10 18 27 13 15 20 | 15 9 9 8 14 14 15 17 21 10 22 13 18 8 14 21 | 16 15 21 18 14 15 13 11 18 15 24 10 13 12 19 22 | 10 9 14 19 19 20 14 15 12 13 17 28 15 13 15 23 | 15 15 14 17 18 18 32 28 15 17 18 23 22 27 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Fabio Moschini --------------------------------------------------------------------------- Observer: Stan Nelson Location: Roswell, New Mexico, USA (33 27' N, 104 31' W) Frequency: 54.31 MHz Antenna : 6M Beam, az 280 deg, elev 15 deg Receiver: AirSpy Computer: HP desktop Observing method: Spectrum Lab Colorgramme RMOB Lab v 3.0 | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 2 2 1 0 1 4 3 3 2 0 6 4 0 3 4 1 | 4 2 1 1 0 1 1 2 2 1 1 4 2 1 2 2 | 3 2 1 2 0 4 1 2 3 3 1 1 2 0 0 3 | 3 0 5 2 2 1 3 3 3 4 3 3 2 3 6 4 | 7 2 0 5 4 3 9 7 6 5 4 10 6 6 0 5 | 8 5 7 8 10 8 21 19 16 23 9 16 6 7 15 6 | 16 12 10 8 5 9 17 25 18 19 24 17 5 14 28 7 | 19 20 10 14 16 20 30 25 18 25 20 30 9 9 25 8 | 15 18 11 17 19 22 35 30 16 30 21 30 13 15 21 9 | 29 14 16 19 31 25 36 29 19 34 39 41 21 29 37 10 | 22 15 21 32 37 26 36 38 32 42 31 37 21 25 27 11 | 22 20 17 25 26 21 28 34 37 23 34 30 20 34 43 12 | 17 28 23 16 20 13 20 28 22 26 27 27 15 35 33 13 | 23 19 23 32 20 33 21 25 25 27 29 22 8 27 22 14 | 28 14 19 17 25 20 10 22 27 22 25 22 23 26 29 15 | 19 25 24 21 25 20 20 42 26 30 37 17 27 35 29 16 | 17 28 27 27 19 32 21 36 30 33 42 16 30 26 31 17 | 27 27 18 27 29 29 23 25 36 24 31 12 12 22 33 18 | 30 14 8 18 12 10 16 32 22 27 36 11 19 22 27 19 | 18 14 14 21 4 17 14 21 19 18 23 4 14 18 18 20 | 14 12 10 15 6 15 14 14 14 21 11 9 14 21 27 21 | 14 9 5 14 7 7 11 8 10 13 14 6 10 11 14 22 | 5 4 1 4 6 5 16 2 8 7 11 6 6 4 9 23 | 1 3 5 6 4 0 5 3 8 4 2 4 3 3 9 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 1 1 3 1 3 1 1 2 1 3 2 0 2 5 7 1 | 1 3 2 1 3 0 0 1 1 2 1 1 2 2 3 2 | 2 3 3 0 6 1 1 2 1 1 8 0 3 1 0 3 | 3 4 3 3 6 4 2 3 5 3 3 0 5 7 5 4 | 11 5 1 9 5 15 13 7 2 4 3 1 6 24 13 5 | 15 7 8 4 12 16 9 9 9 10 21 2 15 28 24 6 | 20 12 15 17 19 20 20 17 14 11 16 2 15 39 32 7 | 28 18 13 13 14 19 26 24 10 9 13 2 27 43 38 8 | 19 21 12 24 17 24 45 24 22 22 10 4 23 42 51 9 | 27 26 36 24 26 23 42 26 24 30 11 2 30 79 57 10 | 35 43 28 36 27 38 38 41 12 22 16 3 29 95 73 11 | 36 27 38 36 32 31 22 36 22 22 17 2 31 93 71 12 | 31 22 29 45 32 37 28 34 19 15 16 6 34 91 72 13 | 22 13 32 27 27 31 42 36 18 23 30 6 30 58 84 14 | 25 28 30 41 32 35 46 58 33 28 31 5 82 87 65 15 | 26 25 23 30 39 39 35 28 43 38 32 2 66 72 67 16 | 24 23 25 29 50 45 39 27 34 16 30 10 65 75 53 17 | 16 26 31 26 44 23 31 12 31 25 22 22 41 62 57 18 | 15 22 19 24 33 7 20 0 29 25 19 23 38 49 45 19 | 14 22 24 22 20 27 17 0 9 16 17 16 37 54 32 20 | 13 15 14 23 20 15 22 20 25 14 25 41 45 39 21 | 9 1 7 14 16 9 8 7 12 7 4 6 26 26 23 22 | 5 5 8 11 12 5 4 3 8 7 8 10 16 9 15 23 | 6 2 2 5 2 3 6 8 5 4 5 8 4 10 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Stan Nelson --------------------------------------------------------------------------- Observer: Mike Otte Location: Pearl City, IL, USA (42 13' N, 89 51' W) Frequency: 61.2595 MHz as from Jan 2021 Antenna : 5 elem Yagi, az 180 deg, elev 60 deg, TV usb preamplifier Receiver: Nooelec NESDR Computer: Dell Optimus 960 Observing method: Spectrum Lab Colorgramme RMOB Lab v 2.3 Total Counts | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 88 43 37 38 42 86 74 77 81 91 73 58 65 75 73 1 |113 70 65 54 64 123 104 118 83 91 106 108 93 92 122 2 |179 103 93 129 101 152 168 167 136 154 154 162 121 169 112 3 |220 145 124 143 172 205 204 193 197 215 181 200 210 171 165 4 | 188 179 183 183 267 253 308 252 295 291 243 226 246 5 | 228 229 220 275 348 357 358 363 347 277 308 261 6 | 260 210 240 328 387 386 362 380 379 329 334 297 7 | 244 225 255 340 390 417 382 377 361 324 327 317 8 | 208 210 329 320 329 350 367 329 345 297 298 288 9 | 179 165 184 291 300 310 329 306 250 314 259 259 269 10 | 167 178 197 265 308 304 298 280 293 322 270 267 243 11 | 172 170 243 300 296 347 239 312 286 350 279 332 252 12 | 228 159 235 300 311 343 256 316 306 367 336 305 298 13 | 209 195 189 312 369 398 290 311 378 389 355 325 321 14 | 201 294 211 305 354 349 338 313 352 412 349 324 318 15 | 184 263 169 285 346 328 302 320 330 356 322 307 260 16 | 156 177 163 236 254 280 289 243 287 321 236 202 212 17 | 100 139 100 162 168 185 170 186 216 180 131 166 141 18 | 99 90 55 106 127 116 119 133 131 104 92 96 92 19 | 67 55 76 42 79 84 91 76 95 115 75 63 73 74 20 | 53 28 40 47 57 69 65 60 73 78 64 62 59 96 21 | 36 46 46 32 63 74 52 59 65 61 69 69 55 61 22 | 39 30 65 37 48 72 50 58 61 65 66 48 63 49 23 | 63 32 45 23 55 65 59 63 56 54 67 60 59 55 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 117 71 72 67 40 54 87 79 66 87 76 36 59 1 | 88 94 100 109 69 48 84 97 113 105 73 57 113 2 | 154 154 156 150 85 81 133 170 156 158 128 80 79 3 |130 199 183 216 188 156 125 206 210 223 201 125 101 103 4 |224 265 267 232 245 195 147 265 295 269 238 133 132 152 147 5 |304 284 296 263 316 241 215 403 347 337 325 165 158 182 179 6 |303 309 294 305 350 275 197 406 337 356 306 172 157 219 197 7 |288 280 289 312 367 237 230 361 356 370 315 171 168 214 186 8 |260 314 292 276 313 207 197 351 334 354 329 132 153 166 183 9 |264 242 263 266 345 216 186 331 332 268 317 129 142 221 156 10 |246 300 303 321 364 187 218 302 337 319 374 157 183 225 206 11 |282 358 268 353 348 230 220 331 364 356 363 261 192 251 247 12 |293 317 372 379 363 241 332 354 388 397 404 187 223 306 267 13 |313 341 332 350 380 265 417 433 409 396 447 206 284 267 14 |319 381 343 313 354 250 402 373 393 447 355 164 238 250 15 |288 287 320 317 364 229 357 382 373 343 334 190 216 239 16 |202 221 257 222 276 156 291 271 295 271 252 116 140 162 191 17 |187 150 170 162 178 99 178 200 198 188 132 68 78 95 110 18 | 99 80 105 108 95 97 146 119 125 91 90 52 54 71 55 19 | 77 47 78 87 72 77 81 96 92 99 87 31 47 39 56 20 | 50 79 90 82 57 56 88 71 85 108 79 42 38 239 48 21 | 65 90 92 81 63 37 75 82 78 77 54 25 30 197 39 22 | 47 55 56 65 42 31 47 47 69 48 46 32 37 134 35 23 | 52 53 62 75 50 36 54 61 66 66 52 33 26 85 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Mike Otte --------------------------------------------------------------------------- Observer: Ivan Sergey Location: private astronomical observatory close to Molodechno, Belarus (54 16' N, 26 44 E) Frequency: 88.6 MHz Transmitter Location: FM-radio station in Spain, France (95.8 kW Mulhouse/ Belvedere), Antenna: 5 element Yagi Azimuth 270 deg, elevation 5 deg Receiver: an automobile radio tape recorder "PIONER", 2 columns "Maxxstro" for amplification of a signal Observing method: the signal acts on a sound card computer CPU N2600 (1.6 GHz) Automatic calculation of the number of signals with the help of Python-script on the basis of MetAn program data Data sampling system: calculation of number of signals is carried out at by visual viewing all kept screenshots. | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 12 4 5 9 7 4 8 11 8 13 4 2 7 8 11 1 | 11 3 11 9 6 10 5 5 7 7 7 1 4 13 7 2 | 8 5 6 10 8 14 13 8 5 6 18 10 9 10 9 3 | 18 19 13 16 10 14 16 16 20 18 12 3 8 12 8 4 | 21 8 5 18 22 15 12 12 11 16 28 34 14 16 11 5 | 12 18 18 5 17 10 16 16 6 12 18 18 15 12 33 6 | 22 16 15 15 7 20 19 17 24 19 10 11 18 27 7 | 15 19 15 21 12 11 20 14 14 15 4 25 19 35 8 | 19 18 17 19 20 15 19 16 13 19 6 20 16 14 9 | 10 18 16 11 24 19 14 14 19 11 17 16 10 | 17 14 15 10 16 22 24 14 18 6 9 17 11 | 8 15 13 17 19 13 14 26 13 4 17 12 12 | 9 18 15 8 14 9 14 12 14 10 10 6 8 13 | 4 6 7 10 6 10 6 9 3 8 4 10 6 14 | 3 7 7 8 8 7 9 7 6 7 9 3 3 15 | 3 10 13 3 5 7 7 6 5 6 5 4 16 | 1 2 2 6 3 10 3 5 8 5 2 11 4 4 17 | 3 7 6 9 6 5 18 5 3 6 5 17 4 9 18 | 9 6 5 8 4 7 7 5 7 2 4 12 5 3 19 | 8 7 7 3 9 7 6 3 9 12 4 8 10 8 5 20 | 5 7 7 9 9 9 11 4 19 8 3 9 10 7 12 21 | 7 9 14 6 7 9 11 10 10 9 5 6 20 11 12 22 | 5 5 9 7 14 5 13 3 4 20 3 2 16 10 8 23 | 10 4 8 5 11 9 13 13 8 13 5 6 9 10 2 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 5 13 11 2 8 6 33 14 11 8 10 3 4 12 9 1 | 6 11 11 5 8 6 39 11 11 6 7 8 8 8 13 2 | 6 8 12 11 10 5 13 7 9 14 6 17 10 8 9 3 | 8 11 14 14 14 12 18 32 21 21 14 19 18 26 21 4 | 11 9 20 10 10 8 15 16 19 17 22 23 9 22 21 5 | 17 17 18 21 15 11 32 7 17 10 8 19 14 29 27 6 | 16 14 21 20 16 13 16 26 25 19 5 23 27 26 39 7 | 23 16 17 12 20 15 9 26 21 24 13 21 31 27 43 8 | 18 22 14 15 15 26 20 31 22 19 15 31 28 29 24 9 | 21 22 20 12 22 27 32 27 19 19 20 23 13 23 24 10 | 9 15 15 14 8 17 29 20 13 21 18 26 8 21 32 11 | 11 9 18 10 15 15 16 22 14 7 13 16 3 12 13 12 | 9 9 7 13 8 11 20 10 17 8 9 15 18 10 15 13 | 21 14 6 6 8 16 10 6 10 13 6 6 7 15 17 14 | 36 4 4 8 6 8 6 7 6 7 6 12 14 12 15 | 29 4 4 6 7 8 6 5 13 10 7 6 7 7 16 | 7 3 8 7 2 4 7 5 2 7 12 1 5 17 | 12 1 2 3 19 7 8 6 8 9 5 4 13 2 5 18 | 12 7 8 3 11 8 4 6 6 8 8 7 8 7 6 19 | 4 9 8 8 6 9 22 9 4 9 4 6 10 7 6 20 | 6 6 4 3 9 11 12 12 8 4 8 12 13 11 29 21 | 13 9 6 4 6 15 13 17 15 8 16 14 10 10 10 22 | 14 5 3 5 10 30 12 12 8 16 18 8 13 11 21 23 | 11 11 6 9 11 18 10 9 11 11 12 11 14 10 11 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Ivan Sergey ---------------------------------------------------------------------- Observer: Chris Steyaert Location: Mol, Belgium (5 07' 15" E, 51 10' 30" N) Frequency: 49.990 MHz OT1KZG Transmitter: VVS beacon at Astrolab IRIS, Ypres, Belgium (2 54' 45" E, 50 49' 03" N), 50 W, carrier (no modulation), LHCP, upward beaming Antenna: Diamond HB9CV, elev 45 deg, azimuth 270 deg (W), below roof cam Receiver: HRO MRX-50 Computer: Toshiba Satellite 1555CDS, Win98 Observing method: manual count of Speclab recordings | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 25 17 22 30 18 25 19 21 25 25 30 20 15 24 21 1 | 31 20 24 26 11 33 23 25 24 32 31 25 17 25 15 2 | 28 25 27 21 19 28 26 24 22 42 23 35 32 24 16 3 | 16 27 28 29 21 27 27 30 19 23 20 30 33 27 33 4 | 18 20 15 30 27 34 29 25 18 26 23 28 34 20 14 5 | 23 20 17 12 21 21 22 16 16 26 24 22 21 17 14 6 | 19 20 12 20 19 17 17 25 19 21 15 33 25 22 14 7 | 14 20 11 17 14 20 18 22 18 19 15 25 24 18 20 8 | 16 14 10 10 18 6 12 10 6 12 12 13 16 17 13 9 | 13 11 8 19 14 13 15 12 10 13 14 15 23 12 13 10 | 14 16 7 13 12 13 15 7 9 6 11 11 10 11 14 11 | 6 13 10 13 12 6 7 10 8 15 14 11 15 11 11 12 | 14 8 8 7 4 7 4 7 10 11 16 16 16 4 11 13 | 11 12 14 12 14 8 8 12 12 10 10 7 13 15 15 14 | 12 11 8 10 11 10 6 9 10 11 13 14 14 18 6 15 | 7 9 7 10 12 11 9 10 10 7 13 10 12 9 8 16 | 5 8 5 14 5 2 5 7 8 11 12 9 9 3 6 17 | 7 11 11 4 6 9 16 12 6 4 5 7 11 15 6 18 | 7 12 14 4 6 5 9 13 3 10 10 5 4 7 15 19 | 7 6 6 14 6 5 11 10 5 9 9 13 9 14 11 20 | 12 12 11 13 12 7 10 9 17 15 16 13 14 15 21 21 | 18 14 11 14 14 18 14 13 22 27 12 11 14 15 25 22 | 14 17 24 24 17 17 19 18 12 20 25 17 13 15 20 23 | 21 21 28 23 21 20 30 26 20 23 24 26 21 15 17 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 24 21 22 29 22 22 25 30 24 34 27 23 13 22 29 1 | 29 32 32 22 40 24 23 29 28 31 24 24 28 28 26 2 | 21 23 22 23 26 22 46 29 20 35 19 29 28 22 21 3 | 20 19 26 19 24 23 21 33 24 26 31 33 29 23 27 4 | 26 20 23 23 22 35 23 29 23 36 17 19 33 16 31 5 | 17 23 18 28 23 29 31 23 24 28 18 27 33 21 26 6 | 15 18 16 21 29 24 30 30 32 29 28 28 25 30 29 7 | 23 21 14 14 28 18 22 32 15 34 30 28 29 30 22 8 | 12 13 14 19 15 14 16 23 17 12 14 17 15 16 23 9 | 11 15 8 9 15 11 15 9 10 9 13 9 19 18 13 10 | 12 6 11 9 15 9 11 12 7 8 13 16 11 | 14 7 8 8 12 9 18 10 8 9 15 12 | 4 8 7 10 14 11 11 11 11 12 12 11 8 15 18 13 | 10 14 11 16 11 13 12 12 5 16 11 16 9 20 20 14 | 10 7 12 12 14 16 17 14 11 19 8 17 11 17 16 15 | 7 17 6 12 13 13 11 12 12 19 10 10 6 17 20 16 | 17 13 15 14 7 13 11 5 13 5 12 15 10 8 17 17 | 5 10 9 7 8 7 8 10 13 4 12 11 9 9 18 18 | 4 7 8 12 8 7 10 7 12 10 14 8 10 10 7 19 | 8 14 8 11 7 17 14 12 7 14 12 13 13 13 13 20 | 10 17 8 15 15 12 9 17 11 9 7 13 5 13 9 21 | 11 17 15 20 18 16 12 17 25 26 15 12 17 14 23 22 | 18 22 16 17 16 16 26 23 26 18 17 22 20 23 20 23 | 30 26 18 16 17 23 31 23 22 33 17 30 29 28 17 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Note: . installed solar panels on May 9, 2018. View of the antenna partially blocked, and increased interference of the convertor. Chris Steyaert --------------------------------------------------------------------------- Observer: Felix Verbelen ON4AVF Location: Kampenhout, Belgium (4 36' E, 50 57' N) Frequency: 49.990 MHz OT1KZG Transmitter: VVS beacon at Astrolab IRIS, Ypres, Belgium (2 54' 45" E, 50 49' 03" N), 50 W, carrier (no modulation), LHCP, upward beaming Antenna: 2-elements HB9CV Yagi, elev 52 deg, azimuth 250 deg (W) Receiver: ICOM 7100 Observing method: automated setup using PC soundcard + Spectrum Laboratory software [Digitised sound and computer images are stored on local hard disks for further analysis. Only overdense meteor reflections are counted manually and used for statistics] Duration >= 2 seconds | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 2 1 2 1 1 0 2 0 3 2 3 2 2 2 0 1 | 3 0 1 1 2 3 5 2 3 2 1 2 1 0 1 2 | 3 3 1 1 0 1 3 3 3 1 3 4 0 4 0 3 | 5 7 4 1 0 3 1 4 1 2 2 5 5 0 2 4 | 1 4 2 3 0 1 1 1 3 4 0 2 3 5 3 5 | 1 2 1 2 3 2 1 2 2 3 4 3 1 3 1 6 | 4 3 4 1 3 0 2 1 4 3 2 1 3 3 3 7 | 3 0 2 1 3 1 2 2 1 3 4 3 5 1 3 8 | 2 2 1 1 3 0 3 3 4 7 2 1 2 0 2 9 | 1 2 4 1 4 2 3 1 3 0 3 3 3 2 4 10 | 1 1 2 2 1 5 6 1 1 1 3 2 1 2 2 11 | 1 0 1 2 2 2 5 1 0 2 2 1 0 1 0 12 | 2 0 2 0 0 5 0 1 0 0 0 2 1 1 0 13 | 0 1 4 1 1 1 6 2 0 0 1 2 0 0 0 14 | 0 2 0 1 1 1 1 2 0 1 0 0 0 1 0 15 | 0 0 1 0 0 2 0 1 0 1 0 0 1 1 0 16 | 0 0 0 2 0 0 0 0 0 1 1 0 0 0 0 17 | 1 0 0 0 0 0 0 0 0 1 0 1 1 1 0 18 | 0 1 2 0 1 0 0 1 1 1 0 1 0 0 0 19 | 0 1 0 0 0 2 0 1 1 0 0 1 0 0 0 20 | 2 0 0 2 1 0 0 0 0 1 1 1 1 0 1 21 | 0 1 1 0 0 0 2 1 0 0 2 2 0 1 2 22 | 0 1 1 0 1 0 1 3 0 1 3 0 0 0 1 23 | 0 1 4 2 1 1 2 2 0 0 2 0 1 2 0 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 1 0 1 4 4 0 0 12 3 1 1 3 1 0 0 1 | 1 1 2 3 5 1 2 8 2 0 1 2 3 1 3 2 | 1 2 1 4 1 3 3 10 1 5 2 3 0 4 1 3 | 1 0 0 3 1 2 3 6 5 4 1 1 2 3 0 4 | 1 3 1 4 3 7 0 12 8 4 2 0 1 3 5 5 | 3 1 3 4 4 3 7 10 2 2 5 2 5 6 4 6 | 3 5 3 3 4 3 1 4 5 1 4 4 4 2 9 7 | 7 5 3 1 3 8 12 2 4 5 3 2 3 8 8 8 | 1 1 3 2 2 3 5 8 3 7 2 1 5 2 5 9 | 3 0 3 2 5 2 9 1 4 4 3 2 1 6 3 10 | 0 1 0 1 3 7 3 3 2 4 0 1 0 1 2 11 | 1 0 2 2 1 2 2 2 3 4 1 0 2 0 7 12 | 1 1 0 0 0 3 0 3 2 2 3 1 1 1 3 13 | 0 0 3 2 0 2 2 2 1 1 1 1 2 2 1 14 | 0 0 0 2 0 1 2 1 0 0 0 3 2 1 3 15 | 0 1 0 0 0 0 1 0 1 0 0 2 0 2 1 16 | 0 1 1 1 0 0 0 2 0 0 1 1 0 1 1 17 | 0 0 0 0 0 0 1 1 2 0 0 0 0 0 4 18 | 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 19 | 0 0 0 3 1 1 0 1 0 0 2 0 1 2 0 20 | 1 0 1 1 1 1 0 0 1 0 0 0 0 1 1 21 | 1 1 1 1 1 2 0 1 2 0 0 0 0 1 1 22 | 1 1 2 2 1 2 3 1 0 0 0 0 0 1 0 23 | 3 0 1 0 0 2 6 1 1 4 1 0 0 2 2 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Duration >= 10 seconds | April 2021 UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ---+----------------------------------------------------------- 0h| 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 | 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 2 | 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 3 | 1 0 0 0 0 0 1 0 1 0 1 0 2 0 1 4 | 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 5 | 0 0 0 1 1 0 0 2 1 0 1 0 0 0 0 6 | 1 0 1 0 0 0 1 0 0 1 0 1 0 1 0 7 | 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 8 | 0 1 0 1 0 0 0 2 1 0 0 0 1 0 0 9 | 1 0 0 0 0 0 0 0 1 0 0 1 0 1 0 10 | 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 11 | 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 12 | 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 | 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 14 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 23 | 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 ---+----------------------------------------------------------- UT | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | April 2021 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 | 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 2 | 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 3 | 0 0 0 1 1 1 1 0 2 0 0 0 0 0 0 4 | 0 0 0 1 1 2 0 3 2 0 0 0 0 1 3 5 | 1 0 0 0 1 0 1 2 0 0 0 0 2 3 0 6 | 0 3 0 1 0 1 0 3 2 0 0 1 2 0 1 7 | 1 1 0 1 0 3 4 2 1 0 0 0 0 1 0 8 | 0 0 0 0 1 1 0 1 1 3 1 1 0 0 1 9 | 0 0 0 0 0 0 2 1 0 0 1 0 0 0 0 10 | 0 0 0 0 0 2 0 0 1 0 0 1 0 0 0 11 | 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 12 | 0 0 0 0 0 2 0 0 1 1 1 0 0 0 1 13 | 0 0 0 1 0 0 0 1 0 0 0 0 0 2 0 14 | 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 15 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 | 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 18 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 | 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 21 | 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 22 | 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 23 | 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Note: . increased noise since June 12, 2019, normally not affecting the long duration counts. Felix Verbelen ---------------------------------------------------------------------- Observer: Bill Ward Location: Kilwinning, UK (4 41' W, 55 39' N) Frequency: 143.05 MHz Graves Receiver: Yaesu FT-817 Antenna: 4 Element Yagi Antenna Direction: elev 0 deg, azimuth 135 deg (SE) Computer: Toshiba Observing method: HROFFT + Colorgramme RMOB Lab v 3.0 | April 2021 UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ---+----------------------------------------------------------- 0h| 18 9 23 18 18 20 21 20 15 20 1 | 19 15 24 26 22 20 11 20 19 17 2 | 24 14 18 30 23 18 15 19 26 18 3 | 25 17 22 25 17 26 16 24 15 28 4 | 16 20 23 20 26 24 22 20 16 26 5 | 24 23 24 38 24 17 19 24 15 27 6 | 16 24 31 34 17 18 25 21 26 21 7 | 18 25 29 18 23 26 25 14 29 8 | 20 21 34 25 25 24 21 20 20 9 | 18 15 34 24 28 19 11 17 23 10 | 26 32 38 34 29 22 28 30 34 11 | 26 28 43 26 29 25 29 18 29 12 | 21 42 27 29 35 38 29 28 31 13 | 37 28 40 34 41 40 25 24 32 14 | 23 28 20 36 27 24 16 34 24 15 | 18 16 24 21 19 20 18 19 23 16 | 15 16 12 14 12 16 13 15 16 17 | 15 7 17 13 10 11 7 10 12 18 | 8 7 9 9 9 14 9 6 4 19 | 7 10 6 14 10 10 11 14 11 20 | 1 10 10 17 5 11 9 6 6 8 21 | 15 12 10 9 7 6 4 21 9 14 22 | 5 12 10 29 11 5 10 11 9 8 23 | 6 14 4 21 11 15 7 5 11 11 ---+----------------------------------------------------------- UT | 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | April 2021 Bill Ward 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 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 previous month's 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, links to interesting web sites. 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CONTRIBUTORS / USEFUL ADDRESSES Enric Fraile Algeciras (EA3BTZ) http://www.telefonica.net/web/enricfraile (in Spanish) http://astrosurf.com/somyce/c_radio.htm Bernard Bayle http://www.bbayle.com Michael Boschat http://www.chebucto.ns.ca/~aa063 Jeff Brower http://members.shaw.ca/jbrower/ Franky Dubois http://www.digilife.be/club/franky.dubois/meteor.html David Entwistle http://www.radiometeor.plus.com/ Karl-Heinz Gansel http://www.radio-astronomie.de/ra/ Peter Knol http://home.deds.nl/~knol Hiroshi Ogawa Radio Meteor Obs. http://www.amro-net.jp/radio.htm Mike Otte W9YS mailto:mike.otte96@gmail.com Enrico Stomeo, Planetario di Venezia http://www.astrovenezia.net/planetario.htm Jochen Plessmann, WHS Walter Hohmann Sternwarte http://www.walter-hohmann-sternwarte.de/ SKiYMET Radar http://www.iap-kborn.de/radar/Radars/ALWIN/index_eng.htm Wayne Sanders http://users.xplornet.com/~rdlobs/ Andy Smith http://www.tvcomm.co.uk/radio - Live audio available Chris Steyaert Mol, Belgium mailto:observations@rmob.org Most recent spectrograms: http://www.rmob.net Radio meteor mailing list (English): radiometeoren@ls.vvs.be, send 'subscribe' in subject or body to radiometeoren-request@ls.vvs.be Twitter @rmob_org Dave Swan http://www.radiodesignservices.co.uk Istvan Tepliczky Online: http://www.galileowebcast.hu/radiometeor Pierre Terrier http://radio.meteor.free.fr/ Meteor mailing list: mailto:meteor-request@ml.free.fr?subject=subscribe Maarten Vln https://www.vvs.be/werkgroepen/werkgroep-radioastronomie/beelden-radiometeoren-op-internet-zetten Joseph Welkenhuyzen https://sites.google.com/site/rmopv2/home-1 Richard White, Gi4DOH http://www.ramfihaz.com/information.htm -- Christian Steyaert (RMOB2104) 4 May 2021 --