R4FJ — 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 R4FJ, decoded by SO8OO in southeastern Poland. 910 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-07-21 and 2026-10-22.
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 910 FT8 messages attributed to R4FJ as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (86%), followed by 40 m (7%) and 160 m (5%). Most decodes (60%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.
Overview
Bands
Last attributed message: 2026-10-22 02:27 UTC
Observed FT8 message patterns
- Attributed sample
- 910 messages
- Active dates
- 10 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -18 to -1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 179, moderate (-15 to -9 dB) 342, strong (≥ -8 dB) 389.
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 R4FJ 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 R4FJ
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
- LO23 · 665 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,639 km (approx.)
- Last such locator decoded
- 2026-10-22 02:27 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 | R4FJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 13:15 | 80m | - / -5 | RU3DX | -6 / - | 2 | Partial capture |
| 10-22 02:27 | 80m | +2 / - | RA3TSK | - / - | 2 | Partial capture |
| 10-22 02:16 | 80m | - / - | UA3RBM | +2 / - | 2 | Partial capture |
| 10-22 02:11 | 80m | -6 / -5 | S57SWR | +20 / -17 | 9 | ✓ Full exchange observed |
| 10-22 02:07 | 80m | -4 / -8 | DJ0BS | +6 / -11 | 6 | ✓ Full exchange observed |
| 10-22 01:59 | 80m | 0 / - | OH7KWX | -11 / -15 | 5 | ✓ Closing observed |
| 10-22 01:44 | 80m | 0 / - | P4/WE9V | - / - | 2 | Partial capture |
| 10-22 01:38 | 80m | -6 / -10 | F4ESO | +12 / -5 | 5 | ✓ Full exchange observed |
| 10-22 01:38 | 80m | -3 / - | SP7JLH | - / - | 5 | Partial capture |
| 10-22 01:31 | 80m | -2 / - | SV2SIF | - / -20 | 11 | Partial capture |
| 10-22 01:29 | 80m | -1 / - | SP7JLH | - / - | 4 | Partial capture |
| 10-22 01:23 | 80m | +5 / -9 | DA6OOM | +1 / - | 8 | Partial capture |
| 10-22 00:54 | 80m | -1 / - | PA1KDB | - / - | 4 | Partial capture |
| 10-22 00:51 | 80m | +3 / - | SP8BJU | - / - | 2 | Partial capture |
| 10-22 00:36 | 80m | +1 / - | OH4EIJ | - / - | 3 | Partial capture |
| 10-22 00:28 | 80m | -9 / - | RM8T | -12 / +9 | 4 | ✓ Closing observed |
| 10-22 00:26 | 80m | +5 / - | RA4HAP | - / - | 2 | Partial capture |
| 10-22 00:23 | 80m | +4 / -4 | RJ9M | 0 / -4 | 5 | ✓ Full exchange observed |
| 10-21 23:33 | 80m | -2 / - | DL8YRM | - / - | 2 | Partial capture |
| 10-21 23:29 | 80m | 0 / -5 | OK1BLU | +13 / - | 7 | Partial capture |
| 10-21 23:25 | 80m | 0 / - | SP6NIV | - / - | 2 | Partial capture |
| 10-21 23:10 | 80m | -5 / - | SQ4PKO | - / - | 4 | Partial capture |
| 10-21 23:06 | 80m | -1 / -18 | DG3YEV | +17 / - | 3 | ✓ Closing observed |
| 10-21 22:53 | 80m | -2 / -4 | DO8PAT | +2 / -15 | 5 | ✓ Full exchange observed |
| 10-21 22:52 | 80m | 0 / - | ER1CW | - / -22 | 3 | ✓ Closing fragment |
| 10-21 22:39 | 80m | -7 / -11 | OM1TD | +11 / -1 | 5 | ✓ Full exchange observed |
| 10-21 22:09 | 80m | -4 / - | DG2EBG | - / - | 3 | Partial capture |
| 10-21 22:07 | 80m | -4 / -3 | DK1MCS | +14 / - | 3 | ✓ Closing observed |
| 10-21 21:58 | 80m | -6 / -8 | UD6AWH | -14 / -9 | 5 | ✓ Full exchange observed |
| 10-21 21:54 | 80m | -6 / -8 | DL9NCR | +14 / 0 | 6 | ✓ Full exchange observed |
| 10-21 21:52 | 80m | - / -5 | TA1MB | -8 / - | 2 | Partial capture |
| 10-21 21:49 | 80m | -4 / - | TA2PYZ | - / - | 3 | Partial capture |
| 10-21 21:45 | 80m | -4 / -9 | DO6SHB | +17 / -1 | 5 | ✓ Full exchange observed |
| 10-21 21:43 | 80m | -11 / -12 | HA0HV | +6 / - | 3 | ✓ Closing observed |
| 10-21 21:32 | 80m | 0 / -9 | DL6FCK | +2 / -18 | 6 | ✓ Full exchange observed |
| 10-21 21:29 | 80m | -8 / -18 | PE1EXQ | -5 / -12 | 7 | ✓ Full exchange observed |
| 10-21 21:23 | 80m | -11 / -12 | G7SLB | -12 / -11 | 11 | ✓ Full exchange observed |
| 10-21 21:19 | 80m | -9 / - | EB1LA | - / - | 2 | Partial capture |
| 10-21 21:12 | 80m | -6 / - | UR4UM | - / - | 4 | Partial capture |
| 10-21 21:04 | 80m | -5 / - | RA6OY | - / - | 3 | Partial capture |
| 10-21 21:02 | 80m | -12 / - | DL2FM | - / - | 3 | Partial capture |
| 10-21 21:00 | 80m | -10 / -15 | F1HFP | +6 / +2 | 6 | ✓ Full exchange observed |
| 10-21 20:59 | 80m | +2 / - | EA3NE | - / - | 2 | Partial capture |
| 10-21 20:57 | 80m | -2 / - | 9A3J | - / - | 2 | Partial capture |
| 10-21 20:45 | 80m | -8 / - | R4FES | - / -9 | 3 | ✓ Closing fragment |
| 10-21 20:39 | 80m | -4 / -9 | DC0GL | -10 / -22 | 4 | ✓ Full exchange observed |
| 10-21 20:38 | 80m | -2 / -15 | IU5VMC | 0 / -1 | 4 | ✓ Full exchange observed |
| 10-21 20:34 | 80m | -10 / - | IK5AFJ | - / - | 4 | Partial capture |
| 10-21 20:33 | 80m | -14 / - | SP2GR | - / - | 2 | Partial capture |
| 10-21 20:27 | 80m | -7 / -15 | DL5MO | -3 / -14 | 10 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 021345 +20 1574 R4FJ S57SWR -05 021445 -6 1574 S57SWR R4FJ LO23 021500 +22 1574 R4FJ S57SWR -11 021515 -7 1574 S57SWR R4FJ R-17 021530 +17 1574 R4FJ S57SWR RR73 021545 -7 1574 S57SWR R4FJ 73 021600 +1 1476 R4FJ UA3RBM +12 021600 +11 1802 R4FJ SN0EG JO73 021630 +2 1476 R4FJ UA3RBM +12 022100 +2 1234 DL1MC R4FJ LO23 022700 +1 1321 RA3TSK R4FJ LO23 (x2) 023100 -3 2052 R4FJ RA6LTD +04 131515 -6 1410 R4FJ RU3DX -05 (x2)
UTC dB Audio Message 025715 +1 391 OM7ASP R4FJ LO23 (x2) 180345 +3 1502 R4FJ HA5AO -14 (x2) 181545 -9 763 R4FJ SP8WB -15 (x2) 182845 -17 1742 R4FJ RA5AD -04 (x5) 192400 -21 1446 R4FJ RT5C -19 (x2) 192615 -11 387 RT5C R4FJ R+01 170515 +1 805 R4FJ SP6TRX RR73
UTC dB Audio Message 231530 -14 857 EA7ATM R4FJ LO23 (x2) 231715 -15 2129 R4FJ EA7ATM -08 (x2) 232130 -10 614 OH7WA R4FJ LO23 (x3) 232400 -14 517 S56MLZ R4FJ LO23 (x2) 095730 +3 670 R4FJ SP4BB -14 (x2) 122845 -20 1375 R4FJ RA5AD +27 (x2) 131200 -8 240 R4FJ SP5XZM -20 133645 -10 362 R4FJ UA3NFI +04
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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