IU1JFI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU1JFI, decoded by SO8OO in southeastern Poland. 825 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 54 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-13.
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 825 FT8 messages attributed to IU1JFI as the transmitting token by decoded message structure across 54 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (85%), followed by 10 m (11%) and 40 m (4%). Most decodes (55%) 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 -6.3 dB.
Overview
Bands
Last attributed message: 2026-09-13 17:45 UTC
Observed FT8 message patterns
- Attributed sample
- 825 messages
- Active dates
- 54 UTC dates
- Estimated median S/N
- -6.3 dB
- Estimated 10th-90th percentile
- -15 to +9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 70, moderate (-15 to -9 dB) 266, strong (≥ -8 dB) 489.
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 IU1JFI 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 IU1JFI
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
- JN35 · 701 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,209 km (approx.)
- Last such locator decoded
- 2026-09-13 17:45 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 | IU1JFI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-13 17:44 | 40m | -12 / - | EA8BS | - / - | 2 | Partial capture |
| 08-31 17:12 | 20m | -3 / - | K2TQC | - / -14 | 6 | ✓ Closing fragment |
| 08-31 17:05 | 20m | -6 / - | EX7DY | - / - | 2 | Partial capture |
| 08-29 17:22 | 40m | - / -15 | R4ZZ | -2 / - | 4 | ✓ Closing fragment |
| 08-29 17:18 | 40m | -10 / - | OH3OJ | - / - | 4 | Partial capture |
| 08-28 11:58 | 20m | +10 / - | RZ3Z/P | - / - | 10 | Partial capture |
| 08-28 11:52 | 20m | +14 / - | <...> | - / - | 11 | Partial capture |
| 08-28 11:48 | 20m | +14 / - | RZ3Z/P | - / - | 5 | Partial capture |
| 08-27 18:38 | 20m | +4 / - | WA8EFK | - / - | 10 | Partial capture |
| 08-27 18:37 | 20m | +2 / - | KC1MMC | - / - | 2 | Partial capture |
| 08-27 18:35 | 20m | 0 / - | WA8EFK | - / - | 3 | Partial capture |
| 08-27 18:29 | 20m | +14 / - | JA8ECS | - / -9 | 3 | Partial capture |
| 08-27 18:21 | 20m | +11 / - | ZS6MGM | - / - | 11 | Partial capture |
| 08-27 18:18 | 20m | +4 / - | 5B4ARQ | - / -13 | 4 | ✓ Closing fragment |
| 08-27 18:17 | 20m | +4 / - | SV2HTW | - / 0 | 2 | ✓ Closing fragment |
| 08-27 09:01 | 20m | 0 / - | VK6ABC | - / - | 4 | Partial capture |
| 08-26 09:44 | 20m | +7 / - | K1IM | - / -10 | 2 | Partial capture |
| 08-26 09:41 | 20m | - / - | RZ4FWA | -6 / - | 2 | Partial capture |
| 08-26 09:41 | 20m | - / -14 | ON1DGN | -2 / - | 5 | Partial capture |
| 08-26 08:49 | 20m | -6 / - | WA3MH | - / - | 2 | Partial capture |
| 08-24 17:10 | 20m | - / -23 | K2TQC | -12 / - | 2 | ✓ Closing fragment |
| 08-24 08:45 | 20m | - / -16 | TI5RR | -15 / - | 3 | ✓ Closing fragment |
| 08-24 08:44 | 20m | -12 / - | W2GLH | - / - | 3 | Partial capture |
| 08-24 08:37 | 20m | -5 / - | K4TI | - / - | 2 | Partial capture |
| 08-23 19:21 | 20m | +15 / - | VA3KGB | - / -13 | 4 | ✓ Closing fragment |
| 08-23 18:35 | 20m | +18 / - | BG2ATH | - / - | 3 | Partial capture |
| 08-23 18:29 | 20m | +15 / - | EB3DGJ/QRP | - / - | 4 | Partial capture |
| 08-23 18:23 | 20m | +10 / - | BA3NZ | - / - | 3 | Partial capture |
| 08-23 18:21 | 20m | +6 / - | K4A | - / - | 2 | Partial capture |
| 08-23 18:15 | 20m | +1 / - | Z21ML | - / - | 5 | Partial capture |
| 08-23 18:11 | 20m | +1 / - | 4L7T | - / - | 2 | Partial capture |
| 08-23 08:28 | 20m | 0 / - | VK6XT | - / - | 4 | Partial capture |
| 08-23 08:20 | 20m | -4 / - | K4A | - / -23 | 5 | Partial capture |
| 08-21 10:43 | 20m | - / -18 | K6ND | -18 / - | 2 | ✓ Closing fragment |
| 08-21 07:50 | 20m | -8 / - | VK3LV | - / - | 5 | Partial capture |
| 08-21 07:46 | 20m | -15 / - | VK3LV | - / - | 3 | Partial capture |
| 08-21 07:40 | 20m | -6 / - | VK3LV | - / - | 7 | Partial capture |
| 08-20 18:45 | 20m | -6 / -18 | BA3NZ | -8 / -4 | 4 | ✓ Full exchange observed |
| 08-20 18:43 | 20m | -4 / - | <...> | - / - | 2 | Partial capture |
| 08-20 18:38 | 20m | -3 / - | XU7O | - / -11 | 4 | Partial capture |
| 08-20 18:21 | 20m | -13 / - | KF9UG | - / - | 3 | Partial capture |
| 08-20 09:57 | 10m | -14 / - | IK3/UY7LA | - / - | 2 | Partial capture |
| 08-19 19:35 | 20m | - / -23 | EA8UP | +10 / - | 2 | ✓ Closing fragment |
| 08-17 09:43 | 20m | -6 / - | VO1NC | - / -14 | 8 | Partial capture |
| 08-08 18:38 | 20m | -4 / - | HS0ZOY | - / - | 2 | Partial capture |
| 08-05 10:09 | 20m | -3 / - | V31DL | - / - | 5 | Partial capture |
| 08-02 11:13 | 20m | -4 / - | CO8LY | - / - | 3 | Partial capture |
| 08-02 10:26 | 20m | -13 / - | K1GUY | - / - | 6 | Partial capture |
| 08-02 10:18 | 20m | -5 / - | KE2UK | - / - | 2 | Partial capture |
| 07-31 18:55 | 20m | -12 / - | K2TQC | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 181245 -17 1953 IU1JFI F5RRS JN36 (x5) 171800 -3 376 OH3OJ IU1JFI JN35 (x4) 172245 -4 267 IU1JFI R4ZZ -15 (x4) 174430 -12 778 EA8BS IU1JFI JN35 (x2)
UTC dB Audio Message 120300 +9 596 RZ3Z/P IU1JFI JN35 (x4) 183430 +13 600 <...> IU1JFI JN35 173145 -18 1065 VK2LAW IU1JFI JN35 170515 -10 1215 EX7DY IU1JFI JN35 (x2) 170715 -12 713 K2TQC IU1JFI JN35 (x7)
UTC dB Audio Message 145130 -5 976 LU2EI IU1JFI 73 132115 -15 976 BI4SSB IU1JFI JN35 (x3) 132615 +0 976 A71QQ IU1JFI JN35 (x6) 182430 -13 981 4X1UF IU1JFI JN35 091830 +3 647 RA0SCA IU1JFI JN35 (x2) 095745 -14 1037 IK3/UY7LA IU1JFI JN35 (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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