IZ4SJP — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IZ4SJP, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-23.
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 36 FT8 messages attributed to IZ4SJP as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 20 m (39%). Several six-hour UTC windows tied for the largest share (58%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-08-23 14:32 UTC
Observed FT8 message patterns
- Attributed sample
- 36 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -19 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 17, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 11.
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 IZ4SJP in decoded directed-looking exchanges:
Most frequent locator attributed to IZ4SJP
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
- JN54 · 26 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,013 km (approx.)
- Last such locator decoded
- 2026-08-23 14:32 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 | IZ4SJP S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-25 15:33 | 40m | - / -2 | DJ9UN | -4 / - | 3 | ✓ Closing fragment |
| 08-25 15:24 | 40m | - / -16 | IK2YYO | -16 / - | 4 | Partial capture |
| 08-25 15:12 | 40m | - / -11 | OK1DSJ | -7 / - | 2 | Partial capture |
| 08-25 15:03 | 40m | - / -14 | OM2EVK | -2 / - | 3 | ✓ Closing fragment |
| 08-25 14:59 | 40m | - / -12 | DL6ENT | -8 / - | 2 | ✓ Closing fragment |
| 08-25 14:56 | 40m | - / -4 | S57TW | +4 / - | 3 | ✓ Closing fragment |
| 08-25 14:55 | 40m | - / -19 | DL5WP | -6 / - | 2 | ✓ Closing fragment |
| 08-25 13:52 | 40m | - / - | SP3IPA | +6 / - | 4 | Partial capture |
| 08-23 14:36 | 20m | - / -14 | M8KVH | 0 / - | 2 | ✓ Closing fragment |
| 08-23 14:35 | 20m | - / - | F1PPH | -12 / - | 10 | Partial capture |
| 08-23 14:29 | 20m | -19 / - | ON1AJ | -4 / -23 | 4 | Partial capture |
| 08-23 14:26 | 20m | - / - | M8KKH | +3 / - | 2 | Partial capture |
| 08-23 14:07 | 20m | - / - | M8KKH | -2 / - | 5 | Partial capture |
| 08-23 14:05 | 20m | -18 / -10 | MW7RHR | -11 / -15 | 4 | ✓ Full exchange observed |
| 08-23 14:03 | 20m | - / -10 | M6ILA | -7 / - | 7 | Partial capture |
| 08-22 15:01 | 20m | - / -17 | SA0WAE | -14 / - | 4 | ✓ Closing fragment |
| 08-22 14:05 | 40m | - / - | HA1DSL | -12 / - | 2 | Partial capture |
| 08-22 13:09 | 20m | - / - | DL1UDO | +4 / - | 3 | Partial capture |
| 08-22 12:56 | 20m | -15 / -20 | PD9BTB | 0 / - | 4 | Partial capture |
| 08-22 12:46 | 40m | - / - | HA5IKS | -14 / - | 2 | Partial capture |
| 08-22 12:37 | 40m | - / -1 | HA3HM | -12 / - | 2 | ✓ Closing fragment |
| 08-22 12:18 | 40m | - / - | HA1DSL | -16 / - | 2 | Partial capture |
| 08-21 17:09 | 40m | - / - | HA1DSL | -14 / - | 2 | Partial capture |
| 08-21 17:09 | 40m | - / - | IU5VLR | -11 / - | 3 | Partial capture |
| 08-21 16:50 | 40m | - / - | IZ5FSO | -7 / - | 2 | Partial capture |
| 08-21 16:42 | 40m | - / -9 | HA3GO | -6 / - | 6 | ✓ Closing fragment |
| 08-21 16:41 | 40m | - / +5 | HA1LS | -5 / - | 2 | ✓ Closing fragment |
| 08-21 16:36 | 40m | - / -7 | E71T | -6 / - | 2 | ✓ Closing fragment |
| 08-21 16:29 | 40m | -16 / - | DL1HKL | -9 / -21 | 2 | Partial capture |
| 08-09 17:06 | 20m | - / - | DL1UDO | -9 / - | 2 | Partial capture |
| 08-09 15:21 | 20m | - / - | DL9YNG | -22 / - | 2 | ✓ Closing fragment |
| 08-04 09:46 | 20m | - / -14 | G0OOD | -20 / - | 4 | Partial capture |
| 07-02 09:36 | 20m | - / - | G4DBW | -8 / - | 3 | Partial capture |
| 06-30 12:43 | 20m | - / -19 | OS4K | -8 / - | 4 | Partial capture |
| 06-30 12:41 | 20m | - / - | DL1UDO | -6 / - | 3 | Partial capture |
| 06-30 12:41 | 20m | - / - | F4BYA | -1 / - | 8 | Partial capture |
| 06-30 12:39 | 20m | - / -15 | II7WWA | -13 / - | 3 | Partial capture |
| 06-28 15:20 | 20m | - / -17 | EA4T | -16 / - | 2 | Partial capture |
| 06-28 09:32 | 20m | - / - | I4RHP | -4 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 150345 -3 1190 IZ4SJP OM2EVK -14 (x2) 150845 -3 757 IZ4SJP DH5NC +00 151215 -6 1914 IZ4SJP OK1DSJ -11 (x2) 152415 -14 1672 IZ4SJP IK2YYO -16 (x4) 152915 -14 1717 IZ4SJP II7MGBT -11 153315 -18 1397 IZ4SJP IV3LAN JN65 153345 -4 891 IZ4SJP DJ9UN -02 (x3) 153845 -9 2425 IZ4SJP DF6WE JO31
UTC dB Audio Message 143530 -9 1762 IZ4SJP F1PPH JN07 143600 +1 1673 IZ4SJP M8KVH -14 143600 -11 1762 IZ4SJP F1PPH JN07 143630 -1 1673 IZ4SJP M8KVH RR73 143630 -9 1762 IZ4SJP F1PPH JN07 (x8) 144300 +1 2155 IZ4SJP M8KKH JO01 144700 -16 879 IZ4SJP EA2EED -10 (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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