IU8SDI — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving IU8SDI, decoded by SO8OO in southeastern Poland. 199 FT8 messages attributed to this token as transmitter, on 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-10-27 and 2026-11-04.
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 199 FT8 messages attributed to IU8SDI as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). 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 -11 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 199 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -17 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 97, strong (≥ -8 dB) 73.
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 IU8SDI 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 IU8SDI
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
- JN71 · 135 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,075 km (approx.)
- Last such locator decoded
- 2026-11-04 22:06 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 | IU8SDI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-04 21:57 | 40m | -8 / -21 | AP5ARS | -11 / -15 | 13 | Partial capture |
| 11-04 21:53 | 40m | -14 / - | VK6WTF | - / -18 | 2 | Partial capture |
| 11-04 21:49 | 40m | -14 / - | OA4ENG | - / - | 6 | Partial capture |
| 11-04 21:47 | 40m | -14 / - | JA2KGH | - / -13 | 4 | Partial capture |
| 11-04 21:38 | 40m | -17 / - | WA4CAS | - / -12 | 2 | Partial capture |
| 11-04 21:37 | 40m | -13 / - | JH2BJL | - / -12 | 13 | Partial capture |
| 11-04 21:30 | 40m | -12 / - | JH2BJL | - / - | 8 | Partial capture |
| 11-04 21:20 | 40m | - / -23 | IZ4EKI | -18 / - | 2 | Partial capture |
| 11-04 21:17 | 40m | -10 / - | IU5HIU | -13 / -11 | 4 | Partial capture |
| 11-04 21:17 | 40m | -14 / - | JH1FSF | - / -19 | 2 | Partial capture |
| 11-04 21:13 | 40m | - / - | IU4PPL | -17 / - | 2 | Partial capture |
| 11-04 20:40 | 40m | -15 / - | BH3FZG | - / - | 5 | Partial capture |
| 11-04 20:30 | 40m | -7 / - | ZL1RPC/F | - / -6 | 7 | Partial capture |
| 11-04 20:29 | 40m | -14 / - | JA5BDZ | - / - | 2 | Partial capture |
| 11-04 20:25 | 40m | -10 / - | VJ6X | - / -9 | 2 | ✓ Closing fragment |
| 11-04 20:23 | 40m | -11 / - | OE3RWR | - / -1 | 2 | Partial capture |
| 11-04 20:19 | 40m | -6 / - | VK3XIL | - / -16 | 4 | ✓ Closing fragment |
| 11-03 21:36 | 40m | -8 / - | AP5ARS | - / - | 9 | Partial capture |
| 11-03 21:31 | 40m | -9 / - | AP5ARS | - / - | 3 | Partial capture |
| 11-03 21:27 | 40m | -11 / - | AP5ARS | - / - | 2 | Partial capture |
| 11-03 21:22 | 40m | -14 / - | BG3NBD | - / -15 | 10 | ✓ Closing fragment |
| 11-03 20:59 | 40m | -19 / - | SQ8AA | - / -9 | 3 | Partial capture |
| 11-03 20:51 | 40m | -13 / - | BH3FZG | - / - | 3 | Partial capture |
| 11-01 17:06 | 40m | -4 / - | HL2DNU | - / - | 5 | Partial capture |
| 11-01 17:04 | 40m | -2 / - | 5R8IC | - / - | 4 | Partial capture |
| 11-01 16:16 | 40m | -5 / - | 3A2LF | -18 / +7 | 3 | ✓ Closing observed |
| 10-31 22:36 | 40m | -14 / - | JO4IPQ | - / - | 3 | Partial capture |
| 10-31 22:33 | 40m | -13 / - | LU2DSL | - / - | 3 | Partial capture |
| 10-31 22:27 | 40m | -14 / - | JH5LCN | - / -10 | 3 | ✓ Closing fragment |
| 10-31 22:24 | 40m | -12 / - | PY1USK | - / -13 | 4 | ✓ Closing fragment |
| 10-31 18:19 | 40m | -4 / - | AP5ARS | - / - | 12 | Partial capture |
| 10-31 18:10 | 40m | -14 / - | BA4IE | - / - | 9 | Partial capture |
| 10-30 17:56 | 40m | -8 / - | BG4UCZ | - / - | 4 | Partial capture |
| 10-30 07:48 | 40m | -5 / - | DH2NJS | -4 / -7 | 5 | ✓ Closing observed |
| 10-30 07:46 | 40m | -4 / - | XE1YD | - / -11 | 5 | ✓ Closing fragment |
| 10-29 19:34 | 40m | -2 / 0 | F5MXH | -4 / +8 | 8 | ✓ Full exchange observed |
| 10-29 19:28 | 40m | -2 / - | JH1CTV | - / -10 | 4 | Partial capture |
| 10-29 19:24 | 40m | -13 / - | VK2LAW | - / -19 | 2 | Partial capture |
| 10-29 07:48 | 40m | -10 / - | KE8YOU | - / - | 5 | Partial capture |
| 10-29 07:44 | 40m | -8 / - | NU1T | - / - | 8 | Partial capture |
| 10-27 20:18 | 40m | -11 / - | TN8GD | - / -12 | 3 | Partial capture |
| 10-27 20:10 | 40m | -7 / - | TN8GD | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 215315 -14 1350 VK6WTF IU8SDI JN71 (x2) 215715 -11 1021 AP5ARS IU8SDI JN71 (x3) 215900 -11 730 IU8SDI AP5ARS -21 215915 -6 485 AP5ARS IU8SDI R-15 (x9)
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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