RA9CUU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RA9CUU, decoded by SO8OO in southeastern Poland. 3,325 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 67 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-04.
These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.
SO8OO decoded 3,325 FT8 messages attributed to RA9CUU as the transmitting token by decoded message structure across 67 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 40 m (31%) and 20 m (21%). Most decodes (85%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.
Overview
Bands
Last attributed message: 2026-10-04 17:15 UTC
Observed FT8 message patterns
- Attributed sample
- 3,325 messages
- Active dates
- 67 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -19 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 940, moderate (-15 to -9 dB) 1,562, strong (≥ -8 dB) 823.
WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with RA9CUU in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to RA9CUU
The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.
- Attributed locator
- MO17 · 2,585 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,790 km (approx.)
- Last such locator decoded
- 2026-10-04 17:15 UTC
A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.
Observed FT8 exchanges
S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.
| Time UTC | Band | RA9CUU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-04 17:14 | 80m | -4 / - | RX3VF | +4 / - | 2 | ✓ Closing observed |
| 10-04 17:10 | 80m | -1 / -19 | IK1MJL | 0 / -13 | 9 | Partial capture |
| 10-04 17:09 | 80m | - / - | HG0NPJ | +4 / - | 6 | Partial capture |
| 10-04 17:09 | 80m | - / - | IK3UTT | +7 / - | 3 | Partial capture |
| 10-04 17:09 | 80m | - / - | UW5ESX | -8 / - | 6 | Partial capture |
| 10-04 16:59 | 80m | - / - | IK3UTT | +3 / - | 4 | Partial capture |
| 10-04 16:57 | 80m | -2 / -15 | HA7XL | +14 / -19 | 5 | ✓ Full exchange observed |
| 10-04 16:56 | 80m | 0 / - | UA3SCU | - / -9 | 2 | ✓ Closing fragment |
| 10-04 16:54 | 80m | - / - | UW5ESX | -6 / - | 3 | Partial capture |
| 10-04 16:54 | 80m | -6 / -9 | RC3RF | -12 / -5 | 4 | ✓ Full exchange observed |
| 10-04 16:33 | 40m | - / - | F6DJL | -12 / - | 2 | Partial capture |
| 10-04 15:55 | 40m | - / - | UA3PTY | -4 / - | 2 | ✓ Closing fragment |
| 10-04 15:52 | 40m | - / -18 | HA3TBL | -10 / - | 3 | ✓ Closing fragment |
| 10-03 17:25 | 80m | -18 / -2 | R5BS | -4 / - | 4 | ✓ Closing observed |
| 10-03 17:25 | 80m | - / - | DO2DLE | -10 / - | 2 | Partial capture |
| 10-03 17:15 | 80m | -16 / - | RV3X | - / - | 11 | Partial capture |
| 10-03 17:14 | 80m | - / - | DC6NS | -5 / - | 3 | Partial capture |
| 10-03 17:08 | 80m | - / -15 | DH3MIT | +4 / - | 6 | ✓ Closing fragment |
| 10-03 17:07 | 80m | - / -5 | RW3VR | -2 / - | 3 | ✓ Closing fragment |
| 10-03 17:01 | 80m | -17 / - | GW8DX | - / - | 5 | Partial capture |
| 10-03 16:59 | 80m | - / - | DL4DP | -10 / - | 2 | Partial capture |
| 10-03 16:56 | 80m | -24 / -16 | R1BQR | -12 / -22 | 3 | ✓ Full exchange observed |
| 10-03 16:55 | 80m | - / - | DO2DLE | -8 / - | 2 | Partial capture |
| 10-03 16:53 | 80m | - / - | IK1MJL | -2 / - | 3 | Partial capture |
| 10-03 16:50 | 80m | -14 / 0 | R2CC | -16 / -12 | 5 | ✓ Full exchange observed |
| 10-03 16:47 | 80m | - / - | DO2DLE | -8 / - | 4 | Partial capture |
| 10-03 16:46 | 80m | -12 / 0 | R2SN | -4 / -2 | 3 | ✓ Full exchange observed |
| 10-03 16:34 | 80m | -15 / - | R4CCW | - / - | 3 | Partial capture |
| 10-03 16:31 | 80m | - / - | DO2DLE | -9 / - | 4 | Partial capture |
| 10-03 16:29 | 80m | -11 / - | R9HEN | - / -10 | 3 | ✓ Closing fragment |
| 10-03 16:25 | 80m | -14 / -20 | F5PAC | +8 / -24 | 4 | ✓ Full exchange observed |
| 10-03 16:21 | 80m | -16 / -5 | RA2FGK | -1 / -21 | 6 | ✓ Full exchange observed |
| 10-03 16:19 | 80m | - / -9 | RA6OD | +3 / - | 3 | Partial capture |
| 10-03 16:18 | 80m | - / -16 | F5PAC | +10 / - | 2 | Partial capture |
| 10-03 16:14 | 80m | -8 / -5 | R3ZBY | -11 / -7 | 4 | ✓ Full exchange observed |
| 10-03 16:12 | 80m | -10 / - | RW9MZ | - / -1 | 2 | ✓ Closing fragment |
| 10-03 16:09 | 80m | -10 / - | R1IV | - / - | 3 | Partial capture |
| 10-03 16:09 | 80m | - / - | YO2MNZ | +7 / - | 3 | Partial capture |
| 10-03 16:07 | 80m | - / - | DJ6VX | +15 / - | 5 | Partial capture |
| 10-03 16:05 | 80m | - / - | DC5PPM | -3 / - | 2 | Partial capture |
| 10-03 16:04 | 80m | -6 / -4 | R2APC | +1 / -10 | 5 | ✓ Full exchange observed |
| 10-03 16:03 | 80m | - / - | DJ6VX | +11 / - | 3 | Partial capture |
| 10-03 16:02 | 80m | -8 / - | UA9KBC | - / -4 | 2 | ✓ Closing fragment |
| 10-03 15:25 | 80m | - / - | OZ6FH | -6 / - | 8 | Partial capture |
| 10-03 15:19 | 80m | -18 / - | RO2E/P | - / - | 2 | Partial capture |
| 10-02 17:59 | 80m | -19 / - | DK2BJ | +7 / -15 | 4 | ✓ Closing observed |
| 10-02 17:56 | 80m | -18 / -12 | OE2GEN | +15 / -16 | 5 | ✓ Full exchange observed |
| 10-02 17:44 | 80m | -23 / -3 | R2SN | -5 / - | 3 | ✓ Closing observed |
| 10-02 17:41 | 80m | -22 / -17 | DO3HJW | +3 / -20 | 5 | ✓ Full exchange observed |
| 10-02 17:34 | 80m | -17 / -16 | G4CDN | +5 / -18 | 4 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 171130 -9 2860 RA9CUU UW5ESX KN67 171130 +2 1073 RA9CUU IK1MJL R-19 171130 +4 2416 RA9CUU HG0NPJ JN97 171200 -7 2860 RA9CUU UW5ESX KN67 171200 +0 1073 RA9CUU IK1MJL R-16 171200 +4 2415 RA9CUU HG0NPJ JN97 171230 -3 1067 RA9CUU DH0BRO JO62 171245 -1 1066 IK1MJL RA9CUU -13 171300 +0 1180 RA9CUU IK1MJL R-15 (x2) 171445 -4 1065 RX3VF RA9CUU RR73 171500 +4 1065 RA9CUU RX3VF 73 171515 -1 1066 CQ RA9CUU MO17 171600 +1 1150 RA9CUU IK1MJL R-23 (x2)
UTC dB Audio Message 154915 -10 967 CQ RA9CUU MO17 (x6) 155200 -6 2079 RA9CUU HA3TBL JN86 (x3) 155500 -5 966 RA9CUU UA3PTY KO84 (x2) 163330 -12 976 RA9CUU F6DJL JN38 (x2) 164115 -15 977 CQ RA9CUU MO17 (x2)
UTC dB Audio Message 095730 -24 1739 RA9CUU CU2AP -22 (x3) 091000 -24 1333 OE5VCM RA9CUU RR73 091430 -22 1332 OK4AR RA9CUU RR73 091600 -21 1331 CQ RA9CUU MO17 (x3) 091830 -17 1330 IK6EUH RA9CUU RR73 091900 -20 1330 CQ RA9CUU MO17 (x2) 092000 -20 1330 SQ5WBW RA9CUU -16 (x2) 105330 -20 1294 CQ RA9CUU MO17 (x2)
UTC dB Audio Message 144730 +11 2035 RA9CUU RX3DQL -10 144745 -9 1457 RX3DQL RA9CUU R-04 144800 +7 2035 RA9CUU RX3DQL RR73 145015 -8 1194 YB1IQE RA9CUU R-17 (x2) 145145 -10 1193 CQ RA9CUU MO17 (x2) 145245 -3 1194 A41ZZ RA9CUU R-19 (x2) 145345 -3 1195 CQ RA9CUU MO17 145415 -3 1195 RX0AT RA9CUU MO17 (x3) 145845 -8 1196 CQ RA9CUU MO17 (x2)
Decoder S/N history by band
Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.
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