UF4S/6 — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UF4S/6, decoded by SO8OO in southeastern Poland. 1,355 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-06 and 2026-08-16.
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 1,355 FT8 messages attributed to UF4S/6 as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (90%), followed by 40 m (9%) and 10 m (0%). Most decodes (54%) 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 -16 dB.
Overview
Bands
Last attributed message: 2026-08-16 12:05 UTC
Observed FT8 message patterns
- Attributed sample
- 1,355 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -16 dB
- Estimated 10th-90th percentile
- -21 to -9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 704, moderate (-15 to -9 dB) 558, strong (≥ -8 dB) 93.
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 UF4S/6 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.
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 | UF4S/6 S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-16 11:47 | 20m | - / -8 | YU1FI | -12 / - | 2 | Partial capture |
| 08-16 11:42 | 20m | -16 / - | <...> | -12 / - | 5 | ✓ Closing fragment |
| 08-16 08:48 | 10m | -20 / - | <...> | -18 / - | 2 | ✓ Closing fragment |
| 08-15 07:24 | 20m | - / -7 | F1PBZ | -7 / - | 3 | Partial capture |
| 08-15 06:42 | 20m | -18 / - | DL1BKX | - / -7 | 2 | Partial capture |
| 08-15 06:41 | 20m | -17 / - | <...> | -1 / - | 4 | ✓ Closing fragment |
| 08-15 06:40 | 20m | -16 / - | RJ3T | - / -18 | 2 | Partial capture |
| 08-15 06:32 | 20m | -16 / - | EA1IOK | - / -15 | 2 | Partial capture |
| 08-15 06:30 | 20m | -20 / - | <...> | -6 / - | 2 | ✓ Closing fragment |
| 08-14 20:01 | 40m | - / -1 | F4IZC | -20 / - | 2 | Partial capture |
| 08-14 19:41 | 40m | - / - | F5RRS | -13 / - | 5 | Partial capture |
| 08-14 19:17 | 40m | - / - | OZ8ABA | -8 / - | 11 | Partial capture |
| 08-14 19:10 | 40m | - / -9 | OK1UG | -3 / - | 7 | Partial capture |
| 08-14 19:03 | 40m | -18 / - | <...> | -17 / - | 2 | ✓ Closing fragment |
| 08-14 18:53 | 40m | -18 / - | <...> | - / - | 2 | ✓ Closing fragment |
| 08-11 17:42 | 40m | -20 / - | <...> | -16 / - | 2 | ✓ Closing fragment |
| 08-11 14:42 | 20m | - / - | DG2EBG | -18 / - | 2 | Partial capture |
| 08-11 14:37 | 20m | -10 / - | RY7G | - / -13 | 2 | Partial capture |
| 08-11 14:32 | 20m | - / - | G0MSE | -14 / - | 2 | Partial capture |
| 08-11 14:32 | 20m | -18 / -2 | ON4ASV | 0 / -1 | 4 | Partial capture |
| 08-11 14:32 | 20m | -15 / - | <...> | +4 / - | 4 | ✓ Closing fragment |
| 08-11 08:47 | 20m | -13 / - | <...> | +16 / - | 2 | ✓ Closing fragment |
| 08-11 08:36 | 20m | -19 / - | <...> | - / - | 2 | ✓ Closing fragment |
| 08-11 08:32 | 20m | -19 / - | R3TY | - / -19 | 2 | Partial capture |
| 08-11 08:26 | 20m | -16 / - | <...> | -16 / - | 4 | ✓ Closing fragment |
| 08-11 08:26 | 20m | -19 / -1 | DL1HQN | -9 / -13 | 4 | Partial capture |
| 08-11 06:36 | 20m | -16 / - | <...> | - / - | 5 | ✓ Closing fragment |
| 08-11 06:31 | 20m | -19 / - | <...> | -17 / - | 2 | ✓ Closing fragment |
| 08-11 06:22 | 20m | -14 / - | <...> | -1 / - | 2 | ✓ Closing fragment |
| 08-11 06:13 | 20m | -10 / - | <...> | - / - | 2 | ✓ Closing fragment |
| 08-11 06:06 | 20m | -5 / - | UA4AOC | - / -8 | 2 | Partial capture |
| 08-11 06:06 | 20m | - / - | RJ3DC | -21 / - | 3 | Partial capture |
| 08-11 06:06 | 20m | -6 / - | <...> | - / - | 2 | ✓ Closing fragment |
| 08-11 06:01 | 20m | -16 / - | <...> | -11 / - | 2 | ✓ Closing fragment |
| 08-11 05:59 | 20m | -16 / - | <...> | -12 / - | 2 | ✓ Closing fragment |
| 08-11 05:57 | 20m | -12 / -3 | R2DRY | -11 / -15 | 7 | ✓ Full exchange observed |
| 08-11 05:46 | 20m | -21 / - | <...> | -17 / - | 6 | ✓ Closing fragment |
| 08-10 19:43 | 40m | - / - | DK3TNA | -15 / - | 8 | Partial capture |
| 08-10 19:02 | 40m | -17 / - | <...> | -18 / - | 2 | ✓ Closing fragment |
| 08-10 19:00 | 40m | -19 / - | DL3MIB | - / -14 | 2 | Partial capture |
| 08-10 18:54 | 40m | - / -12 | RU5X | -15 / - | 3 | Partial capture |
| 08-10 18:05 | 40m | - / - | <...> | -9 / - | 2 | ✓ Closing fragment |
| 08-10 17:54 | 40m | - / - | DL1EDR | -13 / - | 3 | Partial capture |
| 08-10 17:51 | 40m | -22 / - | <...> | - / - | 2 | ✓ Closing fragment |
| 08-10 17:38 | 40m | - / - | DK2CC | 0 / - | 2 | Partial capture |
| 08-10 17:38 | 40m | - / - | <...> | -13 / - | 3 | ✓ Closing fragment |
| 08-10 17:33 | 40m | - / - | R6DOP | -17 / - | 4 | Partial capture |
| 08-10 17:27 | 40m | - / - | DK2CC | -12 / - | 4 | Partial capture |
| 08-10 17:26 | 40m | -24 / - | <...> | -14 / - | 2 | ✓ Closing fragment |
| 08-10 16:50 | 40m | -20 / - | <...> | -16 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 115300 -17 1464 CQ UF4S/6 (x7) 115830 -14 1464 <...> UF4S/6 RR73 120030 -12 1464 CQ UF4S/6 (x3) 120300 -14 1464 RA3WPF UF4S/6 -16 120400 -16 1464 CQ UF4S/6 (x3)
UTC dB Audio Message 084815 -18 1123 UF4S/6 <...> 73 084900 -20 1122 DL8UVG UF4S/6 -05 085000 -20 1122 <...> UF4S/6 RR73 085645 -14 1122 UF4S/6 R6YBU LN04 (x2) 100815 -17 1404 UF4S/6 <...> RR73 101530 -23 1404 <...> UF4S/6 RR73 101715 -19 1403 UF4S/6 M0BEW -04 101745 -21 1404 UF4S/6 <...> RR73 (x2)
UTC dB Audio Message 191915 -11 1353 UF4S/6 OZ8ABA JO55 (x8) 194115 -12 1383 UF4S/6 F5RRS JN36 (x5) 200145 -20 1372 UF4S/6 F4IZC R-01 (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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