IU4CKR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU4CKR, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-14 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 54 FT8 messages attributed to IU4CKR as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (96%), followed by 40 m (4%). Most decodes (65%) fell within the six-hour window 08:00-14:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-09-13 19:33 UTC
Observed FT8 message patterns
- Attributed sample
- 54 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -24 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 6.
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 IU4CKR in decoded directed-looking exchanges:
Most frequent locator attributed to IU4CKR
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
- JN64 · 29 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 897 km (approx.)
- Last such locator decoded
- 2026-09-13 19:32 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 | IU4CKR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-13 19:45 | 60m | - / -16 | DH8BAB | +2 / - | 5 | Partial capture |
| 09-13 19:32 | 40m | -8 / - | EA5OL | - / - | 2 | Partial capture |
| 09-13 19:29 | 40m | - / -13 | IK4RVY | -2 / - | 8 | Partial capture |
| 09-07 15:48 | 40m | - / -14 | 2I0WAI | -10 / - | 2 | Partial capture |
| 08-15 14:28 | 20m | - / - | R3KCW | -12 / - | 2 | Partial capture |
| 06-28 13:53 | 20m | -19 / - | TA1APU | - / -19 | 4 | ✓ Closing fragment |
| 06-28 13:44 | 20m | - / - | IZ4AIF | -14 / - | 2 | ✓ Closing fragment |
| 06-28 13:26 | 20m | -18 / - | OH1LA | - / -20 | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 194530 +2 430 IU4CKR DH8BAB -16 (x5)
UTC dB Audio Message 154845 -8 2876 IU4CKR 2I0WAI -14 (x2) 192915 -6 2005 IU4CKR IK4RVY -13 (x5) 193230 -5 782 EA5OL IU4CKR JN64 193245 -3 2005 IU4CKR IK4RVY -13 193300 -10 782 EA5OL IU4CKR R+13 193315 -11 2005 IU4CKR IK4RVY -13 (x2)
UTC dB Audio Message 133430 -24 1626 CQ IU4CKR JN64 134400 -23 1626 SP9CM IU4CKR RR73 134445 -12 1626 IU4CKR IZ4AIF JN54 (x2) 135100 -19 1626 I6XVL IU4CKR 73 135130 -16 1626 CQ IU4CKR JN64 (x3) 135300 -14 1626 TA1APU IU4CKR -19 (x4) 142800 -24 1628 CQ IU4CKR JN64 142815 -12 1576 IU4CKR R3KCW KO90 (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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