BI4JJO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving BI4JJO, decoded by SO8OO in southeastern Poland. 867 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 35 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-31.
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 867 FT8 messages attributed to BI4JJO as the transmitting token by decoded message structure across 35 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%), followed by 10 m (0%). Most decodes (88%) fell within the six-hour window 17:00-23:00 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: 2026-08-31 20:31 UTC
Observed FT8 message patterns
- Attributed sample
- 867 messages
- Active dates
- 35 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) 250, moderate (-15 to -9 dB) 394, strong (≥ -8 dB) 223.
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 BI4JJO 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 BI4JJO
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
- OM86 · 646 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,328 km (approx.)
- Last such locator decoded
- 2026-08-31 20:31 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 | BI4JJO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-06 20:38 | 80m | - / -18 | OT7K | +15 / - | 2 | ✓ Closing fragment |
| 10-06 16:10 | 80m | - / -19 | SP7VC | +6 / - | 3 | ✓ Closing fragment |
| 10-04 21:16 | 80m | - / -24 | OM3TWM | -6 / - | 2 | Partial capture |
| 10-04 14:58 | 80m | - / -17 | UR4LRG | +4 / - | 2 | ✓ Closing fragment |
| 10-02 21:28 | 40m | - / - | RZ4FWA | -14 / - | 3 | Partial capture |
| 10-02 20:16 | 40m | - / -20 | 3Z4DX | -10 / - | 2 | Partial capture |
| 10-01 16:42 | 80m | - / -12 | SP3SLA | +4 / - | 2 | ✓ Closing fragment |
| 10-01 16:00 | 80m | - / -13 | OH7TV | -2 / - | 2 | Partial capture |
| 09-30 21:50 | 40m | - / -20 | LA6YEA | +12 / - | 2 | ✓ Closing fragment |
| 09-29 20:49 | 80m | - / -18 | OH6RX | +6 / - | 2 | ✓ Closing fragment |
| 09-29 19:02 | 80m | - / -15 | IK5PWJ | +11 / - | 2 | ✓ Closing fragment |
| 09-28 16:20 | 40m | - / -17 | OK2IT | +20 / - | 2 | Partial capture |
| 09-27 21:24 | 80m | - / -11 | UA4FKT | +13 / - | 5 | ✓ Closing fragment |
| 09-27 20:46 | 80m | - / - | OH1TSM | +2 / - | 2 | Partial capture |
| 09-26 20:46 | 40m | - / -15 | F5NBU | +24 / - | 3 | Partial capture |
| 09-25 20:53 | 40m | - / -16 | 9A60CBM | -11 / - | 2 | Partial capture |
| 09-24 16:54 | 80m | - / -25 | DL4ME | +6 / - | 2 | ✓ Closing fragment |
| 09-23 17:52 | 80m | - / -15 | EU7A | +18 / - | 2 | ✓ Closing fragment |
| 09-22 18:45 | 40m | - / -13 | YO9PH | +1 / - | 2 | ✓ Closing fragment |
| 09-19 18:08 | 80m | - / -21 | DK1BN | +2 / - | 5 | ✓ Closing fragment |
| 09-17 20:27 | 40m | - / -24 | M5BFL | +12 / - | 2 | ✓ Closing fragment |
| 09-17 17:17 | 80m | - / -21 | DL7VEE | +9 / - | 3 | ✓ Closing fragment |
| 09-17 17:12 | 80m | - / -16 | DL1RNW | +9 / - | 4 | Partial capture |
| 09-17 17:09 | 80m | - / -14 | SN40KZE | +14 / - | 3 | Partial capture |
| 09-17 17:07 | 80m | - / - | DL7VEE | +12 / - | 4 | Partial capture |
| 09-16 21:21 | 40m | - / +2 | 9A3MRN | +4 / - | 2 | ✓ Closing fragment |
| 09-15 17:24 | 80m | - / -16 | OH1ND | +2 / - | 3 | ✓ Closing fragment |
| 09-13 21:44 | 80m | - / -10 | OH3GBW | +1 / - | 4 | ✓ Closing fragment |
| 09-13 21:03 | 80m | - / -21 | LA0FA | +15 / - | 3 | Partial capture |
| 09-13 20:29 | 80m | - / -22 | S59A | +19 / - | 2 | Partial capture |
| 09-09 21:59 | 80m | - / - | IK0SHH | -2 / - | 6 | Partial capture |
| 09-09 21:58 | 80m | - / -18 | SP6JIU | +22 / - | 2 | ✓ Closing fragment |
| 09-09 21:19 | 80m | - / -15 | IZ5ILK | +21 / - | 2 | ✓ Closing fragment |
| 09-07 19:38 | 80m | - / -23 | DJ7M | +12 / - | 6 | ✓ Closing fragment |
| 09-07 19:37 | 80m | - / -11 | UX5UO | +9 / - | 2 | ✓ Closing fragment |
| 09-06 18:43 | 80m | - / - | OK1YQ | +18 / - | 4 | Partial capture |
| 09-06 18:38 | 80m | - / -11 | OH5KNL | +10 / - | 3 | ✓ Closing fragment |
| 09-05 19:37 | 40m | - / -11 | OZ7KJ/P | +10 / - | 2 | ✓ Closing fragment |
| 09-03 21:35 | 80m | - / -14 | EA8UP | -6 / - | 2 | ✓ Closing fragment |
| 09-03 21:30 | 80m | - / - | DF6QP | +2 / - | 2 | Partial capture |
| 09-02 21:44 | 40m | - / -17 | OH7VR | -2 / - | 3 | Partial capture |
| 09-01 21:33 | 80m | - / - | ON5JV | -20 / - | 2 | Partial capture |
| 08-31 20:28 | 20m | -14 / - | 9A5RIS | - / - | 3 | Partial capture |
| 08-31 19:16 | 20m | - / -14 | DL7HS | +1 / - | 3 | ✓ Closing fragment |
| 08-31 18:43 | 20m | - / -14 | EA2WX/P | -8 / - | 3 | ✓ Closing fragment |
| 08-31 18:39 | 20m | - / - | F4NGK | -1 / - | 3 | Partial capture |
| 08-31 18:39 | 20m | - / -16 | PA5MB | 0 / - | 4 | Partial capture |
| 08-31 18:24 | 40m | - / - | F1RAU | -1 / - | 7 | Partial capture |
| 08-31 18:11 | 20m | - / -9 | IT9SVJ | 0 / - | 4 | ✓ Closing fragment |
| 08-31 17:51 | 20m | - / -18 | SV1MOZ | +7 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 160130 -23 1143 BI4JJO RZ0SW OO13 160200 +0 2537 BI4JJO OH8SR -24 160400 -1 2263 BI4JJO OH2CLX RR73 164215 +2 2247 BI4JJO SP3SLA -12 (x2) 202200 -9 1062 BI4JJO TF4M -06 145800 +3 440 BI4JJO UR4LRG -17 (x2) 211600 -6 1969 BI4JJO OM3TWM -24 (x2) 161045 +6 1803 BI4JJO SP7VC -19 (x3) 203800 +15 2120 BI4JJO OT7K -18 (x2)
UTC dB Audio Message 204645 +24 2910 BI4JJO F5NBU -15 (x3) 155800 -13 699 BI4JJO E79KO JN84 162045 +20 573 BI4JJO OK2IT -17 (x2) 215030 +10 2551 BI4JJO LA6YEA -20 (x2) 201630 -8 635 BI4JJO 3Z4DX -20 (x3) 212830 -14 2028 BI4JJO RZ4FWA LO23 (x3) 172400 -2 1384 BI4JJO LZ1AAW -17
UTC dB Audio Message 184100 +2 706 BI4JJO PA5MB -16 184130 -2 1853 BI4JJO F4NGK IN95 184300 -5 2379 BI4JJO EA2WX/P -14 (x3) 191615 +2 699 BI4JJO DL7HS -14 (x3) 193400 +7 526 BI4JJO EA2AA -03 200915 -9 702 BI4JJO S57MPU RRR 202815 -15 480 9A5RIS BI4JJO OM86 (x3) 203115 -19 2315 DL8EX BI4JJO OM86 154900 -18 1022 BI4JJO F1SAA -06
UTC dB Audio Message 085730 -14 1794 BI4JJO 9A6T -10 (x2) 085900 +2 2825 BI4JJO DL1MPR -19 (x2) 090545 +0 2375 BI4JJO IV3FVM -15 090800 -14 1152 BI4JJO LZ1VL -21 (x4) 093745 -8 2766 BI4JJO DO1NUE -15 (x2) 090630 -10 2454 BI4JJO SV3GKU -16 (x2) 104515 -9 611 BI4JJO IZ4TOA -11 (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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