R4FDD — 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 R4FDD, decoded by SO8OO in southeastern Poland. 5,808 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-06 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 5,808 FT8 messages attributed to R4FDD as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (47%), followed by 40 m (27%) and 20 m (16%). The busiest six-hour window was 21:00-03:00 UTC, containing 47% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-10-22 02:29 UTC
Observed FT8 message patterns
- Attributed sample
- 5,808 messages
- Active dates
- 59 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -18 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 895, moderate (-15 to -9 dB) 1,608, strong (≥ -8 dB) 3,305.
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 R4FDD 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 R4FDD
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
- LO33 · 1,524 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,771 km (approx.)
- Last such locator decoded
- 2026-10-22 02:29 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 | R4FDD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 02:28 | 80m | +4 / - | SP9WLC | - / - | 2 | Partial capture |
| 10-22 02:13 | 80m | -1 / -21 | DO5PY | 0 / -15 | 8 | ✓ Full exchange observed |
| 10-22 02:03 | 80m | +2 / +1 | DO2AY | -5 / -13 | 7 | ✓ Full exchange observed |
| 10-20 23:45 | 80m | -3 / - | UA0SCF | - / - | 3 | Partial capture |
| 10-20 23:42 | 80m | +3 / -11 | DA6JH | +5 / - | 3 | ✓ Closing observed |
| 10-20 23:40 | 80m | -8 / -10 | RA9AGL | -12 / +3 | 5 | ✓ Full exchange observed |
| 10-20 23:34 | 80m | +2 / - | MI0OBC | - / -12 | 3 | ✓ Closing fragment |
| 10-20 23:26 | 80m | 0 / -6 | R2UC | +10 / - | 4 | ✓ Full exchange observed |
| 10-20 23:24 | 80m | -11 / - | UA4PDJ | - / - | 3 | Partial capture |
| 10-20 23:22 | 80m | -2 / - | ON5VN | - / - | 2 | Partial capture |
| 10-20 23:16 | 80m | +2 / - | <...> | - / - | 2 | Partial capture |
| 10-20 19:31 | 160m | - / -11 | SM5KNV | 0 / - | 2 | Partial capture |
| 10-20 18:52 | 40m | -2 / - | BG2GWN | - / - | 3 | Partial capture |
| 10-20 18:47 | 40m | 0 / - | I1/OE1AAJ | - / - | 2 | Partial capture |
| 10-20 18:46 | 40m | 0 / - | SQ9GAI | - / -7 | 3 | ✓ Closing fragment |
| 10-20 18:43 | 40m | -12 / -10 | DJ8DI | -4 / -15 | 4 | Partial capture |
| 10-20 18:41 | 40m | -10 / - | VJ6X | - / - | 2 | ✓ Closing fragment |
| 10-20 18:34 | 40m | -11 / -5 | YT2ZE | -2 / - | 5 | ✓ Full exchange observed |
| 10-20 18:32 | 40m | -9 / - | ON6OM | -7 / -6 | 4 | ✓ Closing observed |
| 10-20 18:30 | 40m | -8 / -10 | PD2TX | -8 / -10 | 4 | Partial capture |
| 10-20 18:27 | 40m | -8 / - | BI1HJR | - / -17 | 4 | ✓ Closing fragment |
| 10-20 18:26 | 40m | +3 / - | BD8FWI | - / -10 | 2 | Partial capture |
| 10-20 18:26 | 40m | - / -6 | PE1PTN | -10 / - | 9 | Partial capture |
| 10-20 18:24 | 40m | -3 / - | ER3BN | - / -1 | 3 | ✓ Closing fragment |
| 10-20 18:21 | 40m | - / - | UB3FBD | -4 / - | 2 | Partial capture |
| 10-20 18:18 | 40m | -15 / -12 | G3RCW | -10 / - | 6 | Partial capture |
| 10-20 18:14 | 40m | -3 / -18 | DK6PW | -6 / -10 | 5 | ✓ Full exchange observed |
| 10-20 18:12 | 40m | -13 / - | BA7IWL | - / -21 | 3 | ✓ Closing fragment |
| 10-20 18:08 | 40m | -9 / - | PD1SL | - / - | 2 | Partial capture |
| 10-20 18:06 | 40m | -11 / - | M0ABG | - / -19 | 3 | ✓ Closing fragment |
| 10-20 18:01 | 40m | -6 / -7 | IQ4JO | +5 / +8 | 4 | Partial capture |
| 10-20 17:59 | 40m | -4 / - | S51XA | - / - | 3 | Partial capture |
| 10-20 17:58 | 40m | -6 / - | PD4RJ | - / - | 2 | Partial capture |
| 10-20 17:54 | 40m | +7 / - | 3D2HM | - / -13 | 2 | Partial capture |
| 10-20 17:52 | 40m | -12 / - | BG5JKZ | - / -20 | 2 | Partial capture |
| 10-20 17:47 | 40m | -6 / - | EU4BE | - / -8 | 4 | ✓ Closing fragment |
| 10-20 17:45 | 40m | -12 / - | TA4SSK | - / - | 2 | ✓ Closing fragment |
| 10-20 17:44 | 40m | -5 / -7 | DK3JW | +1 / +2 | 5 | ✓ Full exchange observed |
| 10-20 17:41 | 40m | -10 / - | R0AH | - / - | 3 | ✓ Closing fragment |
| 10-20 17:39 | 40m | -8 / - | RL2F | - / -5 | 3 | ✓ Closing fragment |
| 10-20 17:37 | 40m | -8 / -8 | IK4RVY | -4 / -6 | 4 | ✓ Full exchange observed |
| 10-20 17:36 | 40m | -5 / - | GM0SDV | - / - | 3 | Partial capture |
| 10-20 17:30 | 40m | -10 / - | SP7SZJ | - / - | 2 | ✓ Closing fragment |
| 10-20 17:28 | 40m | -14 / -2 | IZ3KLB | -7 / - | 7 | Partial capture |
| 10-20 17:27 | 40m | -6 / -11 | DM1SV | +7 / -8 | 3 | Partial capture |
| 10-20 17:25 | 40m | -3 / - | SQ9SET | - / - | 3 | Partial capture |
| 10-20 17:21 | 40m | -3 / -11 | M9DNC | -5 / -9 | 5 | ✓ Full exchange observed |
| 10-20 17:20 | 40m | -9 / -10 | DK6WS | -5 / - | 4 | Partial capture |
| 10-20 17:16 | 40m | -13 / - | M6WRB | -17 / - | 2 | ✓ Closing observed |
| 10-20 17:12 | 40m | -5 / - | UN0GY | - / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 020345 -6 756 R4FDD DO2AY RR73 020400 +2 756 DO2AY R4FDD R-13 020415 -1 756 R4FDD DO2AY RR73 020430 +3 756 DO2AY R4FDD R-13 020800 +0 1926 DK1MCS R4FDD 73 021330 -1 2302 DO5PY R4FDD LO33 (x3) 021445 +1 2302 R4FDD DO5PY -21 (x2) 021530 -1 2302 DO5PY R4FDD R-15 021545 +0 2302 R4FDD DO5PY RR73 021600 +3 2302 DO5PY R4FDD 73 022845 +3 2284 SP9WLC R4FDD LO33 (x2)
UTC dB Audio Message 023530 +11 2191 R4FDD DF2GH JN68 (x2) 183615 -12 1743 R4FDD RU1AB R-14 184815 -18 2054 R4FDD RM5P 73 002445 -6 2261 OH6RX R4FDD RR73 003500 -16 1503 CQ R4FDD LO33 003730 +25 1752 R4FDD OM2WQ 73 003830 -12 856 UN7CBY R4FDD RR73 004130 +2 824 R4FDD DK7ZT -17 004145 -8 1199 CQ R4FDD LO33 004200 +3 823 R4FDD DK7ZT -17 191645 -20 1292 RZ4AWB R4FDD RR73 193115 -1 1289 R4FDD SM5KNV R-11 (x2) 200130 +6 2169 R4FDD IK6VXO R-18
UTC dB Audio Message 183800 -12 1803 BG2GWN R4FDD LO33 184100 -11 2441 VJ6X R4FDD LO33 (x2) 184315 -3 1639 R4FDD DJ8DI -10 184330 -11 1640 DJ8DI R4FDD LO33 184345 -5 1639 R4FDD DJ8DI -12 184430 -14 1640 DJ8DI R4FDD R-15 184600 -1 2557 SQ9GAI R4FDD LO33 (x3) 184730 +2 526 I1/OE1AAJ R4FDD LO33 (x2) 185245 -2 2345 BG2GWN R4FDD LO33 (x3)
UTC dB Audio Message 134630 -6 1642 R4FDD 4Z5AV +00 (x2) 110100 -23 1384 R4FDD 7Z1BQ R-10 (x2) 135230 -11 2543 R4FDD CE2SV R-13 (x2) 132230 -17 1188 R4FDD CX1TF -11 095930 -18 1583 R4FDD EB3BZC -11 105130 -13 2494 R4FDD CR7BUW IM58 (x2) 111030 -18 1026 R4FDD HB9IUI +06 111645 -19 1650 R4FDD EA1GAR -05 (x2) 111745 -13 1597 R4FDD CS7BPG IN51 110715 -10 1626 R4FDD TF5B RR73
UTC dB Audio Message 222200 -14 1534 R4FDD ON8SL -14 (x2)
UTC dB Audio Message 101100 -14 2451 R4FDD PD4KK -13 101145 -11 2304 UN0PA R4FDD LO33 101200 -15 2451 R4FDD PD4KK -13 101215 -10 2303 UN0PA R4FDD LO33 (x2) 101415 -1 589 I0KJX R4FDD LO33 (x2) 130415 -24 1721 BI1OBD R4FDD LO33 (x3) 130545 -24 1722 UA9UDO R4FDD LO33 (x2) 130745 -24 1722 G8IXM R4FDD LO33 132630 -22 1620 7E3E R4FDD LO33 (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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