UR4CU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UR4CU, decoded by SO8OO in southeastern Poland. 172 FT8 messages attributed to this token as transmitter, on 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-09-06 and 2026-09-19.
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 172 FT8 messages attributed to UR4CU as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (56%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 172 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -16 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 59, strong (≥ -8 dB) 95.
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 UR4CU 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 UR4CU
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
- KN69 · 75 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 807 km (approx.)
- Last such locator decoded
- 2026-09-19 04:32 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 | UR4CU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 04:32 | 40m | -16 / - | ON5EA | - / - | 2 | Partial capture |
| 09-19 04:31 | 40m | -10 / - | OE4BHF | - / - | 2 | Partial capture |
| 09-19 04:29 | 40m | -5 / -13 | LB4PI | -6 / -13 | 5 | ✓ Full exchange observed |
| 09-18 18:54 | 40m | +2 / - | J48S | - / - | 2 | Partial capture |
| 09-18 18:52 | 40m | -6 / - | OH5KZ | - / -6 | 2 | ✓ Closing fragment |
| 09-18 18:46 | 40m | -6 / - | M0LAD | - / - | 2 | Partial capture |
| 09-18 18:44 | 40m | -9 / -3 | G0WTZ | -18 / - | 5 | Partial capture |
| 09-18 18:15 | 40m | -9 / -19 | G8KHF | -4 / - | 4 | ✓ Closing observed |
| 09-18 14:05 | 40m | -6 / - | 9A3MRN | - / - | 2 | Partial capture |
| 09-18 04:17 | 40m | -5 / -3 | YL2KF | -3 / 0 | 7 | ✓ Full exchange observed |
| 09-18 04:14 | 40m | +2 / - | 9H4JX | - / -11 | 2 | Partial capture |
| 09-18 04:12 | 40m | +12 / - | WA2HIP | - / - | 2 | Partial capture |
| 09-18 04:10 | 40m | -6 / -10 | HZ1TT | -20 / -3 | 4 | ✓ Full exchange observed |
| 09-18 04:08 | 40m | -1 / - | OA4ENG | - / -14 | 3 | ✓ Closing fragment |
| 09-18 04:05 | 40m | -14 / - | HZ1TT | - / - | 4 | Partial capture |
| 09-18 04:01 | 40m | -9 / - | OA4ENG | - / -18 | 7 | Partial capture |
| 09-18 04:00 | 40m | - / -8 | LA5UKA | -10 / - | 2 | ✓ Closing fragment |
| 09-18 03:58 | 40m | +1 / - | HC2GRC | - / -14 | 3 | ✓ Closing fragment |
| 09-18 03:57 | 40m | -10 / - | HZ1TT | - / - | 3 | Partial capture |
| 09-17 17:40 | 40m | -8 / -11 | ON1DGN | -15 / -10 | 6 | ✓ Full exchange observed |
| 09-17 17:40 | 40m | -12 / - | F5PBG | - / -25 | 3 | ✓ Closing fragment |
| 09-17 17:36 | 40m | -18 / -22 | HZ1TT | -5 / +2 | 4 | Partial capture |
| 09-17 17:33 | 40m | -15 / - | M1DBW | - / -15 | 3 | Partial capture |
| 09-17 17:31 | 40m | -13 / - | OE3KJO | - / -6 | 3 | ✓ Closing fragment |
| 09-17 03:29 | 40m | - / - | UA4FKT | -9 / - | 3 | Partial capture |
| 09-16 16:15 | 40m | -3 / -8 | OE3UKW | +4 / -25 | 5 | ✓ Full exchange observed |
| 09-16 16:11 | 40m | 0 / -22 | OM3WFH | -12 / -3 | 5 | ✓ Full exchange observed |
| 09-16 16:08 | 40m | -4 / 0 | OH5KNL | -5 / -1 | 4 | ✓ Full exchange observed |
| 09-16 16:06 | 40m | -9 / -17 | ON8PB | -24 / - | 2 | Partial capture |
| 09-16 04:13 | 40m | -6 / - | HK3TY | - / - | 2 | Partial capture |
| 09-16 04:03 | 40m | +3 / - | HK3TY | - / -7 | 2 | Partial capture |
| 09-16 03:51 | 40m | -5 / -7 | SM7TZK | -3 / -14 | 4 | ✓ Full exchange observed |
| 09-16 03:43 | 40m | -6 / - | TK/4O7CC | - / -5 | 2 | Partial capture |
| 09-16 03:42 | 40m | -10 / - | OA4ENG | - / - | 3 | Partial capture |
| 09-15 14:24 | 40m | -6 / -18 | 3Z100PKP | -6 / -11 | 2 | Partial capture |
| 09-15 14:11 | 40m | -4 / -10 | OE3FVU | -10 / -14 | 12 | ✓ Full exchange observed |
| 09-15 11:29 | 40m | -9 / +3 | UR3AHB | -8 / -3 | 5 | ✓ Full exchange observed |
| 09-15 10:58 | 40m | -21 / -9 | HA7TM | -10 / +3 | 5 | ✓ Full exchange observed |
| 09-15 10:50 | 40m | -12 / 0 | LZ1ZF | -13 / -23 | 7 | ✓ Full exchange observed |
| 09-14 05:15 | 40m | +2 / -14 | YT2FA | -18 / - | 3 | ✓ Closing observed |
| 09-14 05:12 | 40m | -5 / -24 | S58MU | -3 / -15 | 8 | ✓ Full exchange observed |
| 09-14 05:10 | 40m | -16 / - | YL3RS | -19 / - | 3 | ✓ Closing observed |
| 09-14 04:50 | 40m | -20 / -15 | UR4QWW | -14 / -13 | 6 | ✓ Full exchange observed |
| 09-14 04:50 | 40m | -14 / - | OK1HEH | - / -12 | 3 | ✓ Closing fragment |
| 09-14 04:49 | 40m | -17 / -14 | OT7K | +6 / -6 | 5 | ✓ Full exchange observed |
| 09-14 04:22 | 40m | +4 / - | EA9QD | - / -19 | 2 | Partial capture |
| 09-14 04:20 | 40m | +3 / - | GM6URC | - / -9 | 4 | ✓ Closing fragment |
| 09-14 04:18 | 40m | -6 / -3 | LA8ENA | +9 / 0 | 4 | ✓ Full exchange observed |
| 09-14 04:04 | 40m | -8 / - | II8IHBC | - / +1 | 2 | Partial capture |
| 09-14 03:59 | 40m | - / - | EB3JT | -1 / - | 6 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 184945 -9 1139 LB5VK UR4CU KN69 185245 -7 1390 OH5KZ UR4CU R-06 (x2) 185415 +2 684 J48S UR4CU KN69 (x2) 042915 -3 1259 LB4PI UR4CU KN69 042930 -5 1260 UR4CU LB4PI -13 042945 -5 1260 LB4PI UR4CU R-13 043000 -7 1259 UR4CU LB4PI RR73 043015 -7 1260 LB4PI UR4CU 73 043100 -12 1628 OE4BHF UR4CU KN69 (x2) 043215 -12 1864 ON5EA UR4CU KN69 (x2) 043400 -8 1628 OE4BHF UR4CU 73
UTC dB Audio Message 072615 -8 493 UR4CU IK4LZH JN54 (x4)
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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