DO1SJF — 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 DO1SJF, decoded by SO8OO in southeastern Poland. 1,694 FT8 messages attributed to this token as transmitter, on 160m, 80m, 10m, across 42 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-21.
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 1,694 FT8 messages attributed to DO1SJF as the transmitting token by decoded message structure across 42 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (86%), followed by 160 m (7%) and 10 m (6%). Most decodes (82%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -3.9 dB.
Overview
Bands
Last attributed message: 2026-10-21 05:20 UTC
Observed FT8 message patterns
- Attributed sample
- 1,694 messages
- Active dates
- 42 UTC dates
- Estimated median S/N
- -3.9 dB
- Estimated 10th-90th percentile
- -16.2 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 191, moderate (-15 to -9 dB) 313, strong (≥ -8 dB) 1,190.
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 DO1SJF 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 DO1SJF
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
- JN48 · 1,083 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 941 km (approx.)
- Last such locator decoded
- 2026-10-21 05:18 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 | DO1SJF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 05:17 | 80m | +4 / -11 | KX4I | -14 / - | 4 | ✓ Closing observed |
| 10-21 05:15 | 80m | +6 / - | NP3RK | - / - | 4 | Partial capture |
| 10-21 04:58 | 80m | +12 / - | RD9M/3 | - / -6 | 4 | Partial capture |
| 10-21 04:56 | 80m | +10 / - | VE2LBI | - / -9 | 3 | ✓ Closing fragment |
| 10-21 04:55 | 80m | +6 / - | OM3ZAS | +16 / - | 3 | ✓ Closing observed |
| 10-21 04:52 | 80m | +4 / - | NV4B | - / -15 | 5 | ✓ Closing fragment |
| 10-18 17:56 | 80m | -13 / - | HA5IHJ | - / - | 3 | Partial capture |
| 10-18 17:53 | 80m | -9 / - | HB3YTK | - / -6 | 2 | ✓ Closing fragment |
| 10-18 17:51 | 80m | -5 / - | DG4BZ | - / -3 | 3 | Partial capture |
| 10-18 17:46 | 80m | -6 / +5 | F4ESO | -6 / - | 5 | ✓ Full exchange observed |
| 10-18 17:28 | 80m | -7 / - | DO8XC | - / - | 5 | Partial capture |
| 10-18 17:24 | 80m | -8 / -6 | DO8XC | +8 / - | 5 | Partial capture |
| 10-18 17:08 | 80m | +1 / - | R5ACQ | - / - | 10 | Partial capture |
| 10-18 17:01 | 80m | -4 / -9 | ES2AJ | +12 / -2 | 6 | ✓ Full exchange observed |
| 10-18 16:56 | 80m | 0 / - | EV1R | +14 / +4 | 3 | ✓ Closing observed |
| 10-18 16:45 | 80m | - / - | RX3ASQ | -2 / - | 4 | Partial capture |
| 10-13 18:01 | 160m | -21 / -10 | HA5AO | -2 / - | 5 | Partial capture |
| 10-13 17:55 | 80m | +7 / - | M7NQB | - / - | 3 | Partial capture |
| 10-13 17:47 | 80m | +6 / -16 | RV3YN | -14 / -24 | 7 | ✓ Full exchange observed |
| 10-13 17:44 | 80m | +4 / - | F5OYA/P | - / -8 | 3 | Partial capture |
| 10-13 17:43 | 80m | 0 / -13 | OH3OJ | +2 / -8 | 3 | ✓ Full exchange observed |
| 10-13 17:42 | 80m | +9 / - | DL7ROB | - / -24 | 2 | ✓ Closing fragment |
| 10-13 17:40 | 80m | -2 / 0 | F1PBZ | +11 / - | 4 | ✓ Full exchange observed |
| 10-13 17:37 | 80m | +2 / - | YU65AEC | - / -4 | 3 | Partial capture |
| 10-13 17:36 | 80m | -2 / -4 | IZ6JPK | -6 / -12 | 4 | ✓ Full exchange observed |
| 10-13 17:34 | 80m | 0 / - | F5RMK | -12 / -12 | 3 | ✓ Closing observed |
| 10-13 17:30 | 80m | -1 / -8 | 9A4AA | -4 / -7 | 5 | ✓ Full exchange observed |
| 10-13 17:25 | 80m | 0 / -14 | S55X | -3 / -7 | 6 | ✓ Full exchange observed |
| 10-11 22:40 | 80m | +8 / +1 | 4L7T | -16 / -14 | 7 | Partial capture |
| 10-11 22:36 | 80m | +9 / -3 | EA1ESW | -9 / +2 | 4 | ✓ Full exchange observed |
| 10-11 22:34 | 80m | +10 / - | 9H6C | - / -15 | 3 | Partial capture |
| 10-11 22:33 | 80m | +6 / - | T77RN | -4 / -11 | 4 | ✓ Full exchange observed |
| 10-09 20:20 | 80m | -5 / - | SM3WFR | - / - | 2 | Partial capture |
| 10-09 20:18 | 80m | -7 / -16 | 9A4AA | -9 / -13 | 4 | ✓ Full exchange observed |
| 10-09 20:15 | 80m | -4 / - | EA4DL | - / -24 | 3 | ✓ Closing fragment |
| 10-09 20:08 | 80m | -5 / -16 | UC6D | -6 / -21 | 5 | ✓ Full exchange observed |
| 10-09 20:06 | 80m | -4 / -9 | IK1MJK | -14 / -9 | 4 | ✓ Full exchange observed |
| 10-09 20:03 | 80m | -6 / -12 | HA7XL | +1 / -10 | 7 | ✓ Full exchange observed |
| 10-09 20:02 | 80m | -7 / +6 | DO5PY | -13 / - | 6 | ✓ Full exchange observed |
| 10-07 05:56 | 80m | 0 / - | NP3RK | - / - | 7 | Partial capture |
| 10-07 05:40 | 80m | +1 / - | N0BUZ | - / - | 8 | Partial capture |
| 10-07 05:37 | 80m | 0 / - | KY4WI | -10 / -13 | 7 | ✓ Closing observed |
| 10-07 05:36 | 80m | 0 / +8 | MI0NWA | -1 / -1 | 4 | ✓ Full exchange observed |
| 10-06 16:08 | 80m | 0 / - | OZ3AEV | - / -8 | 2 | Partial capture |
| 10-06 15:52 | 80m | +1 / - | RX6LG | - / - | 8 | Partial capture |
| 10-06 15:50 | 80m | -4 / -12 | OM2WW | +8 / +10 | 6 | ✓ Full exchange observed |
| 10-06 15:21 | 80m | -7 / - | OE5YCP | -23 / -9 | 4 | ✓ Closing observed |
| 10-06 15:12 | 80m | -4 / -3 | EV1R | +13 / -9 | 5 | ✓ Full exchange observed |
| 10-06 15:05 | 80m | -4 / +7 | OK2ZCH | +17 / -5 | 5 | ✓ Full exchange observed |
| 10-06 14:15 | 80m | -9 / - | DO8JB | - / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 045630 +8 2427 VE2LBI DO1SJF R-09 (x2) 045845 +9 2427 RD9M/3 DO1SJF JN48 (x3) 050000 -6 453 DO1SJF 9A60CBM -10 050015 +16 2247 RD9M/3 DO1SJF R-06 051530 +5 1987 NP3RK DO1SJF JN48 (x4) 051730 +3 1987 KX4I DO1SJF JN48 (x2) 051845 -14 1071 DO1SJF KX4I -11 052000 +4 1987 KX4I DO1SJF 73
UTC dB Audio Message 193830 -10 1045 OZ9GA DO1SJF -21 193845 -12 801 DO1SJF OZ9GA R+10 193900 -6 1045 OZ9GA DO1SJF RR73 193915 -14 801 DO1SJF OZ9GA 73 210045 +0 1045 EG1PDA DO1SJF JN48 (x2) 210230 -12 1114 DO1SJF EG1PDA +04 (x2) 175645 -6 2126 DO1SJF 9A5E -11 (x2) 180130 -22 1924 HA5AO DO1SJF JN48 180145 -5 1502 DO1SJF HA5AO -10 180200 -20 1925 HA5AO DO1SJF JN48 180215 +2 1502 DO1SJF HA5AO -10 180230 -20 1925 HA5AO DO1SJF JN48
UTC dB Audio Message 112415 -15 1737 DO1SJF PE9JAN JO22 (x2) 112500 -14 1727 PE9JAN DO1SJF -14 112515 -19 1737 DO1SJF PE9JAN R+09 112530 -23 1728 PE9JAN DO1SJF RR73 112545 -18 1737 DO1SJF PE9JAN 73 113345 -18 1671 SV1CQN DO1SJF R-06 (x2) 113815 -22 1673 PD0LBY DO1SJF -13 (x2) 114045 -21 1674 SV2TCC DO1SJF JN48 (x4) 184030 -23 1868 CQ DO1SJF JN48
UTC dB Audio Message 174915 -24 1895 DO1SJF IU4PSX JN54 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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