UI5A — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UI5A, decoded by SO8OO in southeastern Poland. 2,226 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 38 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-17.
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 2,226 FT8 messages attributed to UI5A as the transmitting token by decoded message structure across 38 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (33%), followed by 80 m (28%) and 40 m (14%). Most decodes (53%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-09-17 19:15 UTC
Observed FT8 message patterns
- Attributed sample
- 2,226 messages
- Active dates
- 38 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -18 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 449, moderate (-15 to -9 dB) 726, strong (≥ -8 dB) 1,051.
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 UI5A 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 UI5A
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
- KO85 · 1,100 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,193 km (approx.)
- Last such locator decoded
- 2026-09-17 19:15 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 | UI5A S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 18:51 | 160m | -19 / - | RI1FJZ | - / - | 9 | Partial capture |
| 09-15 21:31 | 80m | -6 / - | RI1FJZ | - / - | 2 | ✓ Closing fragment |
| 09-03 20:34 | 160m | -17 / - | RA0AF | -10 / -2 | 4 | ✓ Closing observed |
| 09-03 20:26 | 160m | - / -18 | RW6PA | -4 / - | 2 | ✓ Closing fragment |
| 08-31 00:01 | 160m | +13 / - | RI1FJL | - / - | 4 | Partial capture |
| 08-30 23:51 | 160m | +12 / - | RI1FJL | - / -23 | 12 | Partial capture |
| 08-25 23:13 | 80m | +4 / - | RI1FJL | - / -21 | 4 | Partial capture |
| 08-25 22:37 | 80m | +5 / - | RI1FJL | - / - | 7 | Partial capture |
| 08-02 21:22 | 160m | -1 / - | RD8X | 0 / -1 | 5 | ✓ Full exchange observed |
| 08-02 21:18 | 160m | -3 / -6 | GI4SNA | -8 / -10 | 5 | ✓ Full exchange observed |
| 08-02 21:16 | 160m | - / - | IU3WNP | -12 / - | 3 | Partial capture |
| 08-02 21:14 | 160m | -11 / -6 | R2LAF/P | -3 / -2 | 5 | ✓ Full exchange observed |
| 08-02 21:02 | 160m | -1 / - | EA5RR | - / - | 2 | Partial capture |
| 08-02 20:58 | 160m | +2 / -7 | 5Z4AB | -12 / -13 | 2 | Partial capture |
| 08-02 20:32 | 160m | +8 / - | <...> | - / -17 | 2 | Partial capture |
| 08-02 20:19 | 160m | +11 / +4 | RA3LCI | -13 / -1 | 5 | ✓ Full exchange observed |
| 08-02 20:02 | 160m | +5 / -5 | UB4FJB | -12 / -9 | 5 | ✓ Full exchange observed |
| 08-02 20:00 | 160m | +8 / - | R2DYN | - / - | 3 | Partial capture |
| 08-02 19:51 | 160m | +14 / - | UA3ZNQ | -5 / -5 | 4 | ✓ Closing observed |
| 08-02 19:44 | 160m | +6 / -1 | R1WBW | -24 / -14 | 4 | ✓ Full exchange observed |
| 07-31 22:59 | 20m | - / -15 | KP4PW | -8 / - | 2 | ✓ Closing fragment |
| 07-31 22:55 | 20m | - / -12 | AB2E | -10 / - | 3 | Partial capture |
| 07-31 22:45 | 20m | - / -12 | GM3JIM | -20 / - | 2 | Partial capture |
| 07-28 04:51 | 20m | - / -8 | RZ3Z/P | -15 / - | 2 | Partial capture |
| 07-28 04:17 | 20m | - / -18 | RA6FSV | -15 / - | 5 | ✓ Closing fragment |
| 07-28 03:53 | 20m | - / -8 | KE1VT | -10 / - | 2 | ✓ Closing fragment |
| 07-28 03:38 | 20m | - / -9 | W9JOY | -9 / - | 2 | ✓ Closing fragment |
| 07-28 03:23 | 20m | - / -17 | W9JOY | -4 / - | 2 | Partial capture |
| 07-26 22:03 | 80m | +1 / -6 | RL3F | -2 / +1 | 5 | ✓ Full exchange observed |
| 07-26 21:59 | 80m | -4 / - | RG2T | +5 / - | 3 | ✓ Closing observed |
| 07-26 21:51 | 80m | 0 / -4 | DL4KSD | -6 / -14 | 7 | ✓ Full exchange observed |
| 07-26 21:48 | 80m | 0 / - | RX3DQL | -9 / -2 | 5 | ✓ Full exchange observed |
| 07-26 21:37 | 80m | 0 / -15 | EA6LU | -4 / -18 | 5 | ✓ Full exchange observed |
| 07-26 21:28 | 80m | -1 / - | EA6LU | - / - | 2 | Partial capture |
| 07-26 21:21 | 80m | 0 / -4 | UA2KU | +10 / -2 | 5 | ✓ Full exchange observed |
| 07-26 18:28 | 40m | -17 / - | RV3DNP | - / -11 | 2 | ✓ Closing fragment |
| 07-26 18:26 | 40m | -15 / - | R5DC | - / -13 | 3 | ✓ Closing fragment |
| 07-26 18:24 | 40m | -17 / - | R3DIH | -14 / -1 | 3 | Partial capture |
| 07-26 18:23 | 40m | -16 / -6 | RA3ZOM | -9 / - | 4 | ✓ Closing observed |
| 07-26 18:18 | 40m | -17 / - | UB3FDA | - / -10 | 3 | ✓ Closing fragment |
| 07-26 18:16 | 40m | -15 / - | UA3QIN | - / -14 | 3 | ✓ Closing fragment |
| 07-26 18:15 | 40m | -16 / - | R2AL | +7 / -10 | 5 | ✓ Full exchange observed |
| 07-26 18:14 | 40m | -19 / - | RA3VX | - / -9 | 2 | ✓ Closing fragment |
| 07-26 18:13 | 40m | -16 / - | RA1TR | - / -12 | 2 | ✓ Closing fragment |
| 07-26 18:09 | 40m | -16 / - | RU7KQ | -16 / -11 | 3 | ✓ Closing observed |
| 07-26 18:05 | 40m | - / -7 | RA7M | -7 / - | 2 | ✓ Closing fragment |
| 07-26 17:58 | 40m | -16 / -9 | R7NK | -7 / -6 | 3 | ✓ Full exchange observed |
| 07-26 17:57 | 40m | -15 / - | R2AKN | - / -5 | 2 | ✓ Closing fragment |
| 07-26 17:42 | 40m | -16 / - | RA3RTB | - / - | 2 | ✓ Closing fragment |
| 07-26 17:41 | 40m | -16 / - | UB6ZDJ | - / -13 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 203415 -17 1948 RA0AF UI5A KO85 (x2) 203500 -10 894 UI5A RA0AF RR73 203515 -16 1949 RA0AF UI5A 73 212115 -15 796 VK6IR UI5A KO85 185145 -21 921 RI1FJZ UI5A KO85 (x10)
UTC dB Audio Message 220430 -2 2114 UI5A RL3F RR73 220445 +1 1439 RL3F UI5A 73 223715 +3 1238 RI1FJL UI5A KO85 (x11) 213145 -11 1539 RI1FJZ UI5A KO85 (x2)
UTC dB Audio Message 055045 -12 2232 UI5A RM6OB -11 060800 -21 1165 WA7PVE UI5A KO85 060830 -21 1165 WK9M UI5A KO85 061845 -20 1165 W5XO UI5A KO85 224300 -17 1941 UI5A GM3JIM -14 (x3) 224630 -20 1941 UI5A RR73; YV4PPC <...> -06 225100 -13 1941 UI5A GM3JIM RR73 225545 -9 1275 UI5A AB2E -12 (x3) 225945 -9 580 UI5A KP4PW -15 (x2) 230215 -6 2792 UI5A NU1T RR73
UTC dB Audio Message 181945 -16 1472 UB3FDA UI5A 73 182045 -17 1472 RL3F UI5A R-12 182300 -9 1746 UI5A RA3ZOM -06 (x3) 182400 -16 2038 UI5A R3DIH +16 182415 -16 1472 RA3ZOM UI5A 73 182430 -12 2039 UI5A R3DIH +16 182445 -17 1472 R3DIH UI5A R-01 182545 -15 1472 RV3DNP UI5A KO85 182615 -18 1471 R5DC UI5A KO85 (x3) 182815 -18 1472 RV3DNP UI5A R-11 (x2)
UTC dB Audio Message 082645 -5 2494 UI5A RV1CC RR73 083045 -17 1534 RN1TV UI5A KO85 (x2) 083245 -20 1534 R3LC UI5A R-16 (x2) 083615 -24 1534 DL1FAM UI5A RR73 083745 -16 1696 UI5A RW3VA -13 083800 -8 1457 UI5A IZ5JNO -01 083815 -17 1696 UI5A RW3VA RR73 083830 -24 1534 RW3VA UI5A 73 083830 +13 1109 UI5A IZ5JNO -01 (x3) 083945 -22 1534 IZ5JNO UI5A 73 084715 -21 1534 RN1TV UI5A KO85
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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