OK1SI — 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 OK1SI, decoded by SO8OO in southeastern Poland. 3,339 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-10-10.
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 3,339 FT8 messages attributed to OK1SI as the transmitting token by decoded message structure across 50 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (86%), followed by 40 m (12%) and 20 m (2%). Most decodes (87%) fell within the six-hour window 19:00-01:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (96%); the estimated median was +12 dB.
Overview
Bands
Last attributed message: 2026-10-10 22:38 UTC
Observed FT8 message patterns
- Attributed sample
- 3,339 messages
- Active dates
- 50 UTC dates
- Estimated median S/N
- +12 dB
- Estimated 10th-90th percentile
- -3 to +20 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 100, strong (≥ -8 dB) 3,211.
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 OK1SI 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 OK1SI
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
- JO70 · 2,021 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 487 km (approx.)
- Last such locator decoded
- 2026-10-10 22:38 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 | OK1SI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-28 00:31 | 40m | - / +7 | SV5BYP | -3 / - | 4 | ✓ Closing fragment |
| 10-28 00:30 | 40m | - / -4 | R4FDK | -11 / - | 3 | ✓ Closing fragment |
| 10-28 00:23 | 40m | - / -16 | F1PBZ | -10 / - | 2 | Partial capture |
| 10-28 00:04 | 40m | - / -14 | EA8AR | -12 / - | 2 | ✓ Closing fragment |
| 10-10 22:37 | 80m | -16 / - | HF40BLP | - / - | 3 | Partial capture |
| 10-10 22:34 | 80m | -4 / - | SP5PKS | - / -1 | 3 | ✓ Closing fragment |
| 10-10 22:32 | 80m | -1 / -3 | DO6MFD | +1 / 0 | 5 | ✓ Full exchange observed |
| 10-07 22:20 | 80m | +16 / - | ON4CJK | - / - | 10 | Partial capture |
| 10-07 22:18 | 80m | +18 / -2 | OH3CYT | 0 / +4 | 5 | ✓ Full exchange observed |
| 10-07 22:16 | 80m | +16 / -20 | M7GOA | -20 / -16 | 3 | ✓ Full exchange observed |
| 10-07 22:13 | 80m | +18 / -5 | G0FYD | -16 / -7 | 5 | ✓ Full exchange observed |
| 10-07 22:10 | 80m | +18 / -7 | SP4WJ | -6 / -3 | 7 | ✓ Full exchange observed |
| 10-07 22:10 | 80m | +17 / - | R8KAW/P | - / - | 3 | Partial capture |
| 10-07 22:08 | 80m | +18 / +7 | DL6LAY | -14 / -2 | 5 | ✓ Full exchange observed |
| 10-07 22:05 | 80m | +16 / - | R2BPS | -13 / -15 | 5 | ✓ Closing observed |
| 10-07 22:05 | 80m | +16 / - | I1WXY | - / - | 2 | Partial capture |
| 10-07 22:03 | 80m | +21 / - | DL4DP | - / -8 | 2 | ✓ Closing fragment |
| 10-07 21:59 | 80m | +23 / -14 | II5GG | +4 / -17 | 7 | ✓ Full exchange observed |
| 10-07 21:58 | 80m | +18 / - | DL5YAS | - / - | 2 | Partial capture |
| 10-07 21:54 | 80m | +14 / -14 | IQ8DO | -12 / -6 | 7 | ✓ Full exchange observed |
| 10-07 21:50 | 80m | +17 / - | DF4WC | -3 / +3 | 5 | ✓ Full exchange observed |
| 10-07 21:49 | 80m | +16 / - | SQ2RAD | -9 / 0 | 3 | ✓ Full exchange observed |
| 10-07 21:47 | 80m | +18 / -18 | ON3VZ | -14 / 0 | 5 | Partial capture |
| 10-07 21:46 | 80m | +14 / - | EA4DM | - / - | 2 | Partial capture |
| 10-07 21:44 | 80m | +14 / - | ON7PR | -6 / 0 | 5 | ✓ Full exchange observed |
| 10-07 21:43 | 80m | +20 / - | DF4WC | - / - | 2 | Partial capture |
| 10-07 21:41 | 80m | +14 / +9 | SP2ADI | +8 / -6 | 7 | ✓ Full exchange observed |
| 10-07 21:39 | 80m | +14 / -2 | IU3FVJ | -4 / -9 | 5 | ✓ Full exchange observed |
| 10-07 21:35 | 80m | +14 / +2 | SP6GCU | +22 / +1 | 4 | Partial capture |
| 10-07 21:34 | 80m | +14 / - | DL7PIA | +5 / +1 | 8 | ✓ Full exchange observed |
| 10-07 21:33 | 80m | +20 / -7 | M0EBM | -6 / -8 | 4 | ✓ Full exchange observed |
| 10-07 21:31 | 80m | +18 / +2 | SQ5ANT | -2 / -1 | 5 | ✓ Full exchange observed |
| 10-07 21:29 | 80m | +20 / -8 | G0BKC | -10 / -8 | 5 | ✓ Full exchange observed |
| 10-07 21:27 | 80m | +15 / - | YT2FA | -10 / -4 | 4 | ✓ Closing observed |
| 10-07 21:25 | 80m | +10 / - | DO9JTR | -2 / -5 | 4 | ✓ Full exchange observed |
| 10-07 21:24 | 80m | +10 / - | SP4BB | - / -6 | 2 | ✓ Closing fragment |
| 10-07 21:20 | 80m | +9 / - | ON1BH | - / -2 | 2 | ✓ Closing fragment |
| 10-07 21:19 | 80m | +16 / - | PD3LR | - / -15 | 2 | ✓ Closing fragment |
| 10-07 21:19 | 80m | +7 / - | OE9RWH | -6 / +1 | 5 | Partial capture |
| 10-07 21:16 | 80m | +15 / - | TM47CDXC | - / -17 | 3 | ✓ Closing fragment |
| 10-07 21:15 | 80m | +16 / - | SP3HGD | -9 / 0 | 5 | ✓ Full exchange observed |
| 10-07 21:12 | 80m | +15 / -14 | E79KO | +6 / 0 | 6 | ✓ Full exchange observed |
| 10-07 21:10 | 80m | +19 / - | OE1PHS | -8 / -3 | 15 | Partial capture |
| 10-07 21:08 | 80m | +19 / 0 | S57BTI | +4 / -9 | 5 | ✓ Full exchange observed |
| 10-07 21:08 | 80m | +21 / -20 | UA4CKN | -13 / -5 | 4 | ✓ Full exchange observed |
| 10-07 21:05 | 80m | +19 / - | GM4JKZ | - / -9 | 2 | ✓ Closing fragment |
| 10-07 21:05 | 80m | +23 / - | OK2VCR | +1 / +2 | 6 | ✓ Full exchange observed |
| 10-06 21:22 | 40m | - / +1 | PH0RON | -8 / - | 2 | ✓ Closing fragment |
| 10-06 21:14 | 40m | -8 / - | JF4VZT | - / - | 7 | Partial capture |
| 10-06 20:43 | 40m | -5 / - | PH9OY | - / -13 | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 234630 -1 539 OK1SI P4/WE9V -09 234800 -15 1537 OK1SI IU5VLR JN53 000200 -11 2343 OK1SI HZ1IP LK18 000430 -12 1786 OK1SI EA8AR -14 (x2) 002345 -14 2602 OK1SI F1PBZ -16 (x2) 003045 -12 391 OK1SI R4FDK LO23 (x2) 003145 -3 835 OK1SI SV5BYP KM46 003145 -13 392 OK1SI R4FDK 73 003215 -7 835 OK1SI SV5BYP R+07 (x3) 003945 -7 2164 OK1SI UK8OM -09
UTC dB Audio Message 222300 +15 335 ON4CJK OK1SI JO70 (x4) 223245 -1 458 DO6MFD OK1SI JO70 223300 +2 457 OK1SI DO6MFD -03 223315 -2 458 DO6MFD OK1SI R+00 223330 +0 458 OK1SI DO6MFD RR73 223345 +0 458 DO6MFD OK1SI 73 223415 -6 2585 SP5PKS OK1SI R-01 (x3) 223700 -11 1892 HF40BLP OK1SI JO70 (x3)
UTC dB Audio Message 210200 +15 449 CQ OK1SI JO70 210315 +7 448 JK1PCP OK1SI JO70 (x2) 213500 -16 2459 OK1SI JF1UVJ PM95 (x4) 215915 -1 1755 OK1SI IR7MGGC +09 184830 +8 353 OK1SI TA2EE KM69 (x2) 184930 +12 352 OK1SI TA3NK KM39 (x3) 185200 -9 1068 OK1SI II7MGML +10 224915 -6 1373 OK1SI HB10GBT -07
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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