RC3D — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RC3D, decoded by SO8OO in southeastern Poland. 1,736 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 72 UTC dates in the available aggregate history. Observed between 2026-06-11 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 1,736 FT8 messages attributed to RC3D as the transmitting token by decoded message structure across 72 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 80 m (33%) and 20 m (17%). Most decodes (77%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was 0 dB.
Overview
Bands
Last attributed message: 2026-10-10 23:03 UTC
Observed FT8 message patterns
- Attributed sample
- 1,736 messages
- Active dates
- 72 UTC dates
- Estimated median S/N
- 0 dB
- Estimated 10th-90th percentile
- -11 to +12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 58, moderate (-15 to -9 dB) 214, strong (≥ -8 dB) 1,464.
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 RC3D 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 RC3D
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
- KO75 · 105 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,081 km (approx.)
- Last such locator decoded
- 2026-10-09 15:29 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 | RC3D S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-10 23:00 | 80m | +2 / - | RK6OZ | - / -4 | 6 | Partial capture |
| 10-10 22:48 | 80m | +6 / - | R8DX | - / -10 | 3 | ✓ Closing fragment |
| 10-09 17:52 | 40m | -10 / -2 | RA6FCU/P | -8 / +1 | 4 | ✓ Full exchange observed |
| 10-09 17:47 | 40m | -4 / - | RA3ZK | - / -10 | 5 | Partial capture |
| 10-09 17:45 | 40m | -5 / - | R1CBA | - / -6 | 4 | Partial capture |
| 10-09 17:27 | 40m | -10 / - | UA9ARM | - / -16 | 2 | Partial capture |
| 10-09 16:56 | 40m | -3 / - | R6AEB | -4 / -9 | 6 | ✓ Full exchange observed |
| 10-09 16:35 | 40m | -8 / - | UD1I | - / -12 | 2 | ✓ Closing fragment |
| 10-09 16:31 | 40m | -8 / - | UA9D | -18 / -2 | 2 | ✓ Closing observed |
| 10-09 16:28 | 40m | -4 / - | R4PHH | - / -10 | 6 | ✓ Closing fragment |
| 10-09 16:13 | 80m | +3 / - | LY8O | - / +1 | 3 | Partial capture |
| 10-09 16:11 | 80m | +2 / - | RW9QA | - / -4 | 2 | ✓ Closing fragment |
| 10-09 16:09 | 80m | - / -1 | UA3QNA | +14 / - | 4 | ✓ Closing fragment |
| 10-09 16:07 | 80m | -9 / -6 | R4HNW | -6 / +4 | 6 | ✓ Full exchange observed |
| 10-09 16:03 | 80m | -6 / - | R9AL | -24 / -3 | 7 | ✓ Closing observed |
| 10-09 15:56 | 80m | 0 / - | R9MBC | - / -8 | 10 | ✓ Closing fragment |
| 10-09 15:41 | 80m | -7 / - | R4PIX | - / -18 | 3 | Partial capture |
| 10-09 15:39 | 80m | -5 / -6 | R8FH | -13 / -6 | 3 | ✓ Full exchange observed |
| 10-09 15:33 | 80m | -12 / 0 | RX3MM | 0 / -1 | 7 | ✓ Full exchange observed |
| 10-09 15:30 | 80m | +4 / - | RW3XZ | - / +3 | 2 | Partial capture |
| 10-09 15:23 | 80m | 0 / - | RA6FCU/P | -18 / - | 5 | ✓ Closing observed |
| 10-08 17:39 | 80m | - / - | DO2ANW | -9 / - | 7 | Partial capture |
| 10-08 17:39 | 80m | - / +2 | RD4CAF | -20 / - | 2 | Partial capture |
| 10-07 04:11 | 80m | - / - | DL9KM | -6 / - | 6 | Partial capture |
| 10-07 04:05 | 80m | -5 / -14 | TK1CX | +2 / -14 | 12 | ✓ Full exchange observed |
| 10-06 14:52 | 40m | - / -12 | RA3RDN | -9 / - | 2 | ✓ Closing fragment |
| 10-06 14:38 | 40m | -5 / - | R6ADH | - / - | 2 | ✓ Closing fragment |
| 10-06 14:36 | 40m | -4 / -6 | R4PEQ | -8 / +2 | 5 | ✓ Full exchange observed |
| 10-06 14:30 | 40m | -4 / - | R8KAW/P | - / -15 | 7 | ✓ Closing fragment |
| 10-06 14:26 | 40m | -3 / - | R7PKS/P | - / -14 | 4 | Partial capture |
| 10-05 15:59 | 40m | -10 / - | R7PKS/P | - / 0 | 2 | ✓ Closing fragment |
| 10-03 16:07 | 160m | -15 / - | RO2E/P | - / -18 | 7 | Partial capture |
| 10-03 15:00 | 80m | -18 / +8 | RO2E/P | -7 / -5 | 4 | ✓ Full exchange observed |
| 10-02 20:41 | 40m | - / - | DH1HF | -18 / - | 2 | Partial capture |
| 10-02 20:34 | 40m | - / - | DH1HF | -14 / - | 4 | Partial capture |
| 10-02 20:32 | 40m | +15 / - | RD0L | - / -16 | 2 | ✓ Closing fragment |
| 10-02 20:31 | 40m | +12 / - | PY5QW | - / -23 | 3 | Partial capture |
| 10-02 20:27 | 40m | +11 / - | PT7YB | -11 / -21 | 6 | ✓ Closing observed |
| 10-02 20:26 | 40m | +10 / - | PA0ARR | - / -10 | 2 | ✓ Closing fragment |
| 10-02 20:23 | 40m | +17 / - | MM5DIT | - / -15 | 3 | ✓ Closing fragment |
| 10-02 20:22 | 40m | +18 / - | OK2VCR | - / -13 | 3 | ✓ Closing fragment |
| 10-02 20:20 | 40m | +18 / - | R6AAF | - / -17 | 2 | ✓ Closing fragment |
| 10-02 20:07 | 40m | +9 / - | RO2E/M | - / -19 | 2 | Partial capture |
| 10-02 20:07 | 40m | +12 / - | G0UDE | -15 / - | 2 | ✓ Closing observed |
| 10-02 20:03 | 40m | +12 / - | RN0D | - / -22 | 7 | ✓ Closing fragment |
| 10-02 19:40 | 80m | +9 / -6 | LZ1EV | +6 / - | 4 | ✓ Closing observed |
| 10-02 19:01 | 80m | -6 / - | R3QS | - / +1 | 2 | Partial capture |
| 10-02 18:56 | 80m | -1 / - | UB2FDL | - / -13 | 3 | Partial capture |
| 10-02 18:53 | 80m | -2 / -2 | UA3PQN | -4 / +2 | 4 | ✓ Full exchange observed |
| 10-02 18:45 | 80m | -1 / +8 | RV3X | +7 / +3 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 161045 +4 2646 RC3D UA3QNA RR73 161100 +1 2645 RW9QA RC3D -04 (x2) 161300 +1 2645 LY8O RC3D +01 (x3) 224830 +3 689 R8DX RC3D -10 (x3) 230000 +3 689 RK6OZ RC3D -04 (x6)
UTC dB Audio Message 172745 -9 2692 UA9ARM RC3D -16 (x2) 174530 -5 2692 R1CBA RC3D -06 (x4) 174730 +0 2692 RA3ZK RC3D -10 (x5) 175230 -10 2693 RA6FCU/P RC3D +01 (x2) 175315 -7 2069 RC3D RA6FCU/P R-02 (x2)
UTC dB Audio Message 200430 -15 1696 RC3D RD7O -01 (x2) 181945 -13 1743 RI1FJZ RC3D KO75 (x3) 182100 -20 1105 RC3D RM5F KO85 181715 +5 2183 RQ7R RC3D KO75 200815 -14 664 RC3D UA1OJL -03 160745 -8 1837 RO2E/P RC3D KO75 (x7)
UTC dB Audio Message 070545 -24 1494 R6UBM RC3D KO75 (x4) 070930 -14 981 RC3D R6TA LN13 (x2) 122100 +1 1302 RC3D CR7BUJ R+00 (x2)
UTC dB Audio Message 151230 -24 1420 RC3D RU3QR -14 151230 -14 628 RC3D F5NNN IN94 151300 -24 1420 RC3D RU3QR -14 150745 -8 2716 C91RU RC3D -12 (x5) 151030 -7 2716 RC3D GJ0KYZ +05 (x2) 151115 -8 2671 GJ0KYZ RC3D 73 104800 -5 1461 RC3D RO6OP R+01 (x2) 070700 +11 2547 RC3D R3KAB R-12 (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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee