YO3IZI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YO3IZI, decoded by SO8OO in southeastern Poland. 264 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-21.
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 264 FT8 messages attributed to YO3IZI as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (45%), followed by 40 m (36%) and 80 m (13%). Several six-hour UTC windows tied for the largest share (80%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (89%); the estimated median was -2 dB.
Overview
Bands
Last attributed message: 2026-08-21 08:44 UTC
Observed FT8 message patterns
- Attributed sample
- 264 messages
- Active dates
- 12 UTC dates
- Estimated median S/N
- -2 dB
- Estimated 10th-90th percentile
- -9 to +11 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 30, strong (≥ -8 dB) 234.
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 YO3IZI 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 YO3IZI
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
- KN25 · 141 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 549 km (approx.)
- Last such locator decoded
- 2026-08-21 08:44 UTC
Other locator fields attributed to this token: KN24 (1).
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 | YO3IZI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-21 08:43 | 20m | -2 / - | OJ0YL | - / - | 2 | Partial capture |
| 08-21 08:23 | 20m | -8 / - | OJ0YL | - / - | 2 | Partial capture |
| 08-21 07:52 | 20m | +1 / - | TA7TC | - / - | 3 | ✓ Closing fragment |
| 08-10 20:05 | 40m | -7 / - | EA7GHD | - / -9 | 3 | ✓ Closing fragment |
| 08-10 20:01 | 40m | -6 / - | TN8GD | - / - | 5 | Partial capture |
| 08-10 19:56 | 40m | -6 / - | EA4GA | - / -12 | 3 | ✓ Closing fragment |
| 08-10 19:31 | 40m | -7 / - | JA8EPO | - / +3 | 6 | ✓ Closing fragment |
| 08-10 19:25 | 40m | -6 / - | ES4TIX | - / - | 2 | Partial capture |
| 08-10 19:04 | 20m | -6 / - | EA4GA | - / - | 3 | Partial capture |
| 08-10 18:45 | 40m | -2 / - | SP4LO | -10 / +2 | 4 | ✓ Closing observed |
| 08-10 18:42 | 40m | -7 / - | LB2AK | - / - | 3 | Partial capture |
| 08-10 18:35 | 40m | -6 / - | SV6JHA | -6 / +6 | 3 | ✓ Closing observed |
| 08-10 18:31 | 40m | -4 / - | SM3ULU | - / -4 | 2 | ✓ Closing fragment |
| 08-10 18:27 | 40m | -3 / - | ES4TIX | - / - | 3 | Partial capture |
| 08-07 03:46 | 40m | - / -10 | W2CG | -20 / - | 2 | ✓ Closing fragment |
| 08-01 20:08 | 40m | -2 / - | EA4LO | - / - | 2 | Partial capture |
| 07-30 04:07 | 40m | +2 / - | KE9I | - / - | 5 | Partial capture |
| 07-23 21:37 | 80m | +10 / -6 | F4MXD | -12 / -16 | 5 | ✓ Full exchange observed |
| 07-23 21:34 | 80m | +7 / +2 | DA6HF | -12 / -14 | 9 | ✓ Full exchange observed |
| 07-23 21:18 | 40m | - / +6 | F6HRP | -3 / - | 3 | ✓ Closing fragment |
| 07-23 21:13 | 80m | +14 / -8 | R2EA | -4 / +8 | 4 | ✓ Full exchange observed |
| 07-23 21:12 | 80m | +15 / +1 | OH5KNL | -2 / +4 | 5 | ✓ Full exchange observed |
| 07-23 18:56 | 40m | +2 / - | VK3BE | - / -15 | 4 | ✓ Closing fragment |
| 07-23 18:34 | 80m | +16 / -7 | SP3BVI | +13 / -5 | 4 | ✓ Full exchange observed |
| 07-23 18:24 | 40m | +1 / - | VK3BE | - / - | 5 | Partial capture |
| 07-23 18:23 | 40m | +2 / - | UW5KW | - / - | 2 | Partial capture |
| 07-22 12:03 | 20m | - / - | YO8CHF | -14 / - | 2 | Partial capture |
| 07-22 11:56 | 20m | - / -8 | TF4M | -10 / - | 2 | ✓ Closing fragment |
| 07-21 19:18 | 40m | -6 / - | R1TAX | - / -6 | 2 | ✓ Closing fragment |
| 07-21 19:17 | 40m | -3 / -8 | SP7TF | -8 / +2 | 4 | ✓ Full exchange observed |
| 07-21 18:01 | 10m | - / - | DO1NUE | +8 / - | 4 | Partial capture |
| 07-21 17:50 | 20m | -7 / -11 | R3DHP | -6 / +4 | 4 | ✓ Full exchange observed |
| 07-21 17:43 | 20m | -7 / - | BI4XDT | - / - | 2 | ✓ Closing fragment |
| 07-21 17:40 | 20m | +2 / - | 2E1HAT | - / -4 | 2 | Partial capture |
| 07-21 17:38 | 20m | -2 / -9 | G4DBW | -16 / +6 | 5 | ✓ Full exchange observed |
| 07-21 17:38 | 20m | -7 / - | PD3LKN | -7 / -3 | 2 | Partial capture |
| 07-21 17:35 | 20m | - / - | PD2WL | -14 / - | 6 | Partial capture |
| 07-21 17:18 | 40m | -7 / -4 | IQ4JO | -2 / +10 | 5 | ✓ Full exchange observed |
| 07-21 17:14 | 40m | -9 / - | HA9OA | +2 / - | 3 | ✓ Closing observed |
| 07-21 17:14 | 40m | -6 / - | ZL1VAH | - / -21 | 2 | ✓ Closing fragment |
| 07-21 17:12 | 40m | -8 / - | RV3DNP | - / -8 | 3 | ✓ Closing fragment |
| 07-21 17:11 | 40m | -4 / - | YC2BUZ | - / -16 | 2 | ✓ Closing fragment |
| 07-21 17:08 | 40m | -6 / - | YO9BGU | - / 0 | 2 | ✓ Closing fragment |
| 07-21 17:07 | 40m | -8 / - | IZ8PPI | - / -4 | 2 | ✓ Closing fragment |
| 07-21 17:05 | 40m | -6 / +1 | DH0GBC | -1 / +5 | 4 | ✓ Full exchange observed |
| 07-21 17:05 | 40m | -6 / - | S51PV | - / -2 | 2 | ✓ Closing fragment |
| 07-21 16:06 | 20m | -4 / - | BA6KC | - / -8 | 2 | ✓ Closing fragment |
| 07-21 07:48 | 20m | +3 / - | OK4SU | - / - | 4 | Partial capture |
| 07-21 07:46 | 20m | -4 / - | TJ1GD/P | - / -19 | 2 | Partial capture |
| 07-20 20:00 | 80m | +10 / - | EA7HY | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 190400 -5 379 EA4GA YO3IZI KN25 (x3) 190900 -11 525 7Z1BQ YO3IZI KN25 192015 -9 618 TL8GD YO3IZI KN25 075200 -7 585 TA7TC YO3IZI KN25 (x3) 075530 -10 373 OK2VX YO3IZI KN25 082315 -4 566 OJ0YL YO3IZI KN25 (x2) 082730 -1 578 MM0VIK YO3IZI KN25 082830 -7 578 LA7WNA YO3IZI KN25 084345 +4 578 OJ0YL YO3IZI KN25 (x2)
UTC dB Audio Message 193300 -8 480 JA8EPO YO3IZI R+03 (x2) 194430 -7 633 EP2AES YO3IZI KN25 195400 -11 900 MW7TTA YO3IZI 73 195600 -7 575 EA4GA YO3IZI KN25 (x3) 200115 -8 481 TN8GD YO3IZI KN25 (x5) 200545 -6 480 EA7GHD YO3IZI KN25 (x3)
UTC dB Audio Message 213430 +4 537 DA6HF YO3IZI KN25 213445 -11 1414 YO3IZI DA6HF +02 213530 -3 537 DA6HF YO3IZI R-14 213545 -12 1414 YO3IZI DA6HF +02 213600 +10 537 DA6HF YO3IZI R-16 213615 -10 1414 YO3IZI DA6HF RR73 213630 +9 537 DA6HF YO3IZI R-16 (x2) 213715 -14 1414 YO3IZI DA6HF RR73 213730 +8 405 F4MXD YO3IZI KN25 213745 -12 1376 YO3IZI F4MXD -06 213800 +10 405 F4MXD YO3IZI R-16 213815 -11 1376 YO3IZI F4MXD RR73 213830 +11 405 F4MXD YO3IZI 73 213915 -13 755 YO3IZI UA9CR +01
UTC dB Audio Message 180100 +6 2768 YO3IZI DO1NUE JN59 (x4) 162900 -10 608 YO3IZI UA4FKT R-08
UTC dB Audio Message 200230 -6 490 EA7HY YO3IZI 73
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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