JI4JKO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JI4JKO, decoded by SO8OO in southeastern Poland. 224 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 38 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-03.
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 224 FT8 messages attributed to JI4JKO as the transmitting token by decoded message structure across 38 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 20 m (29%) and 80 m (17%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12.5 dB.
Overview
Bands
Last attributed message: 2026-10-03 18:42 UTC
Observed FT8 message patterns
- Attributed sample
- 224 messages
- Active dates
- 38 UTC dates
- Estimated median S/N
- -12.5 dB
- Estimated 10th-90th percentile
- -20 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 62, moderate (-15 to -9 dB) 102, strong (≥ -8 dB) 60.
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 JI4JKO 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 JI4JKO
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
- PM64 · 91 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,453 km (approx.)
- Last such locator decoded
- 2026-09-23 20:52 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 | JI4JKO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-05 20:28 | 80m | - / - | DF2GH | +3 / - | 2 | Partial capture |
| 10-05 20:02 | 40m | - / -19 | YL2NX | -11 / - | 4 | Partial capture |
| 10-05 19:35 | 40m | - / -8 | 9A7W | +5 / - | 2 | ✓ Closing fragment |
| 10-04 19:20 | 80m | - / -20 | OT7K | +14 / - | 4 | Partial capture |
| 10-04 19:17 | 80m | - / - | RK6OQ | +6 / - | 3 | Partial capture |
| 10-04 19:14 | 80m | - / -16 | OT7K | +12 / - | 4 | Partial capture |
| 10-04 19:14 | 80m | - / -19 | RA3ZK | +5 / - | 5 | ✓ Closing fragment |
| 10-04 19:14 | 80m | - / -8 | RD3K | +4 / - | 4 | ✓ Closing fragment |
| 10-04 19:14 | 80m | - / - | RK6OQ | +2 / - | 2 | Partial capture |
| 10-03 18:49 | 40m | - / - | F4HEA | +3 / - | 2 | Partial capture |
| 10-03 18:43 | 40m | - / -10 | SP2BRZ | +8 / - | 5 | ✓ Closing fragment |
| 10-03 18:43 | 40m | - / - | SP9FZH | -11 / - | 2 | Partial capture |
| 10-03 18:42 | 40m | -20 / -18 | R2AVT | -5 / - | 4 | ✓ Closing observed |
| 10-03 18:42 | 40m | - / - | OE9GWV | -16 / - | 2 | Partial capture |
| 09-26 20:38 | 40m | - / -13 | CR7BRV | -7 / - | 7 | Partial capture |
| 09-26 20:35 | 40m | - / -13 | M5BFL | +3 / - | 2 | ✓ Closing fragment |
| 09-26 18:47 | 40m | - / - | PE1NPS | -6 / - | 3 | Partial capture |
| 09-26 18:46 | 40m | - / -19 | 9A3EYA | -6 / - | 2 | ✓ Closing fragment |
| 09-23 20:56 | 40m | - / - | IU8RFW | -19 / - | 2 | Partial capture |
| 09-23 20:53 | 40m | - / - | S56SD | -6 / - | 3 | Partial capture |
| 09-23 20:49 | 40m | -21 / - | EA9AR | - / -12 | 7 | ✓ Closing fragment |
| 09-22 21:28 | 40m | -10 / - | F4DIA | - / - | 2 | Partial capture |
| 09-22 21:25 | 40m | - / - | I8/ON8SGA | -2 / - | 4 | Partial capture |
| 09-22 21:24 | 40m | - / - | EA5JKT | -14 / - | 2 | Partial capture |
| 09-22 21:22 | 40m | -15 / -9 | GM0OPS | +15 / -10 | 4 | ✓ Full exchange observed |
| 09-22 21:18 | 40m | -14 / - | LU3DXU | - / -9 | 2 | ✓ Closing fragment |
| 09-22 21:15 | 40m | -9 / -23 | TF4M | -7 / -12 | 3 | ✓ Full exchange observed |
| 09-22 21:13 | 40m | - / - | PA3GAN | -9 / - | 4 | Partial capture |
| 09-22 21:12 | 40m | -10 / -9 | OZ7CL | 0 / -14 | 5 | ✓ Full exchange observed |
| 09-22 21:10 | 40m | -8 / - | G5IAN | - / -23 | 4 | ✓ Closing fragment |
| 09-22 20:48 | 40m | - / - | OE9GWV | 0 / - | 6 | Partial capture |
| 09-22 20:10 | 80m | - / - | RO2X | +11 / - | 4 | Partial capture |
| 09-22 20:08 | 80m | - / -24 | 9A2CD | +20 / - | 4 | Partial capture |
| 09-21 20:45 | 160m | - / - | YO3APJ | +16 / - | 4 | Partial capture |
| 09-21 20:25 | 40m | -11 / - | SM7TZK | +6 / -16 | 4 | ✓ Closing observed |
| 09-21 20:18 | 80m | - / -14 | LX1JH | +16 / - | 2 | ✓ Closing fragment |
| 09-21 19:55 | 40m | - / -16 | F8MRQ | +6 / - | 2 | Partial capture |
| 09-21 19:54 | 40m | -14 / -10 | G8KHF | 0 / -17 | 2 | Partial capture |
| 09-21 19:37 | 40m | - / - | G6PWS | -7 / - | 4 | Partial capture |
| 09-21 19:33 | 40m | - / -14 | LZ2PC | +2 / - | 3 | ✓ Closing fragment |
| 09-21 19:27 | 80m | - / - | IN3VVK | +13 / - | 5 | Partial capture |
| 09-21 19:26 | 80m | - / -16 | 9A5E | 0 / - | 2 | ✓ Closing fragment |
| 09-21 19:21 | 40m | - / - | LY2PAD | -6 / - | 4 | Partial capture |
| 09-21 19:20 | 40m | - / - | ON5AI | 0 / - | 9 | Partial capture |
| 09-21 19:17 | 40m | -18 / -11 | G4GIM | -4 / -19 | 6 | ✓ Full exchange observed |
| 09-21 19:16 | 40m | -12 / - | EA4IAH | -12 / -18 | 4 | Partial capture |
| 09-21 19:14 | 40m | -14 / - | DK6WS | - / -23 | 3 | ✓ Closing fragment |
| 09-21 19:12 | 40m | - / -4 | OK1UG | +10 / - | 3 | ✓ Closing fragment |
| 09-21 19:12 | 40m | - / - | PE1NPS | -7 / - | 4 | Partial capture |
| 09-21 19:09 | 40m | - / -7 | SP2WRE | +1 / - | 5 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 191545 +6 304 JI4JKO RA3ZK KO81 191545 +11 1610 JI4JKO OT7K -16 191615 +7 304 JI4JKO RA3ZK R-19 191615 +12 1610 JI4JKO OT7K -16 191645 +7 304 JI4JKO RA3ZK 73 191745 +2 502 JI4JKO RK6OQ KN87 (x2) 191845 -4 1248 JI4JKO TA3D KM39 191845 +10 502 JI4JKO RK6OQ KN87 192045 +17 1610 JI4JKO OT7K -20 (x4) 202830 -3 1443 JI4JKO DF2GH JN68 (x2)
UTC dB Audio Message 184330 +7 2497 JI4JKO SP2BRZ JO94 184330 -4 635 JI4JKO R2AVT R-18 (x2) 184430 +11 2497 JI4JKO SP2BRZ JO94 (x4) 184930 +3 566 JI4JKO F4HEA JN37 (x2) 193515 +7 1488 JI4JKO 9A7W -08 (x2) 200230 -14 2728 JI4JKO YL2NX KO27 (x4)
UTC dB Audio Message 204545 +18 2418 JI4JKO YO3APJ KN34 (x4)
UTC dB Audio Message 091200 -9 2642 JI4JKO UR6QA KN77 091800 -16 2393 JI4JKO DN9OPA JN38 092430 +5 2172 JI4JKO DL9FCY +02 (x2) 082300 -13 1787 JI4JKO TA6B -03 (x2) 081315 -14 1575 JI4JKO SV9MBL RRR 080030 -22 1999 JI4JKO F1TXI RR73 052630 -19 2270 JI4JKO RQ7R KN64 (x4) 072945 -11 717 JI4JKO A92GE -16 070645 -22 1748 JI4JKO A41DV -07 093115 -11 496 JI4JKO <...> -06
UTC dB Audio Message 195400 -7 1628 JI4JKO G5TV R-11 (x2) 195930 -15 1068 JI4JKO IU5AWQ JN53 (x4) 200130 -4 609 JI4JKO F5SPJ -22 (x5) 225030 -9 872 JI4JKO CT2HEX -04 (x2) 230330 -6 1278 JI4JKO CT1FIU -17 (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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