RT4A — 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 RT4A, decoded by SO8OO in southeastern Poland. 3,758 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 100 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-23.
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 3,758 FT8 messages attributed to RT4A as the transmitting token by decoded message structure across 100 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (40%), followed by 80 m (32%) and 20 m (28%). Most decodes (50%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.5 dB.
Overview
Bands
Last attributed message: 2026-10-23 03:11 UTC
Observed FT8 message patterns
- Attributed sample
- 3,758 messages
- Active dates
- 100 UTC dates
- Estimated median S/N
- -10.5 dB
- Estimated 10th-90th percentile
- -20 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,044, moderate (-15 to -9 dB) 1,152, strong (≥ -8 dB) 1,562.
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 RT4A 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 RT4A
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
- LN28 · 3,016 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,686 km (approx.)
- Last such locator decoded
- 2026-10-23 03:11 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 | RT4A S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-23 03:09 | 40m | -16 / - | YO6GLT | - / -4 | 2 | ✓ Closing fragment |
| 10-22 21:22 | 80m | - / - | F6ECB | -2 / - | 2 | Partial capture |
| 10-22 21:22 | 80m | -10 / -16 | G4FHL | -3 / -14 | 5 | Partial capture |
| 10-22 21:04 | 80m | - / -13 | DO1OAS | +1 / - | 2 | Partial capture |
| 10-22 20:54 | 80m | - / - | DO1OAS | -4 / - | 2 | Partial capture |
| 10-22 20:38 | 80m | - / -10 | TA1SOR | -20 / - | 3 | ✓ Closing fragment |
| 10-22 20:36 | 80m | - / -12 | SV1DKR | -10 / - | 2 | ✓ Closing fragment |
| 10-22 20:18 | 80m | - / -16 | EI4JFB | -6 / - | 3 | ✓ Closing fragment |
| 10-22 19:39 | 80m | - / -12 | OH6JD | 0 / - | 2 | ✓ Closing fragment |
| 10-22 19:31 | 80m | - / - | DL1RAZ | -5 / - | 9 | Partial capture |
| 10-22 19:26 | 80m | - / - | 9A6NCC | +12 / - | 2 | Partial capture |
| 10-22 19:00 | 80m | -16 / -14 | R3DQT | -2 / +4 | 4 | ✓ Full exchange observed |
| 10-22 18:59 | 80m | - / - | R2FEA | +8 / - | 2 | Partial capture |
| 10-22 18:31 | 80m | - / - | DF8RU | 0 / - | 4 | Partial capture |
| 10-22 18:21 | 80m | -4 / +4 | OZ1BM | +2 / -18 | 5 | ✓ Full exchange observed |
| 10-22 17:56 | 80m | -10 / - | RX1AB | -16 / -13 | 3 | Partial capture |
| 10-22 17:53 | 80m | -13 / - | R1QF/P | - / - | 2 | Partial capture |
| 10-22 17:50 | 80m | - / - | R3TS | -22 / - | 2 | Partial capture |
| 10-22 17:48 | 80m | -16 / -10 | R2EA/P | -7 / -5 | 6 | ✓ Full exchange observed |
| 10-21 03:01 | 80m | -8 / +2 | RN3YN | -10 / -13 | 5 | ✓ Full exchange observed |
| 10-21 02:59 | 80m | - / - | ON4MAP | -8 / - | 3 | Partial capture |
| 10-21 02:56 | 80m | -7 / -1 | RA4AUY | -20 / +9 | 3 | ✓ Full exchange observed |
| 10-20 17:41 | 40m | -4 / - | OV5SP | - / -11 | 3 | ✓ Closing fragment |
| 10-20 17:39 | 40m | -7 / - | SP5CJQ | - / -5 | 2 | ✓ Closing fragment |
| 10-20 17:22 | 40m | - / - | M9XPN | -14 / - | 4 | Partial capture |
| 10-20 17:12 | 40m | -18 / -10 | YO3GJE | -10 / - | 5 | ✓ Closing observed |
| 10-20 17:09 | 40m | -9 / - | UB3BDJ | -15 / -13 | 4 | ✓ Closing observed |
| 10-20 17:02 | 40m | -13 / -3 | R5AV | +1 / - | 4 | ✓ Full exchange observed |
| 10-20 16:53 | 40m | - / - | M9XPN | -12 / - | 4 | Partial capture |
| 10-20 03:12 | 40m | - / - | K1JAK | -24 / - | 2 | Partial capture |
| 10-18 19:19 | 80m | -10 / -6 | R4RJ | -12 / -2 | 4 | ✓ Full exchange observed |
| 10-18 19:13 | 80m | -7 / -16 | RA2FU | -4 / -20 | 16 | ✓ Full exchange observed |
| 10-18 19:11 | 80m | - / -4 | UB3YGA | +10 / - | 2 | ✓ Closing fragment |
| 10-18 10:11 | 10m | - / - | EA3EDU | -11 / - | 2 | Partial capture |
| 10-17 18:24 | 80m | - / -10 | UB1AXF | -5 / - | 4 | ✓ Closing fragment |
| 10-17 18:08 | 40m | - / - | DJ9MA | -10 / - | 8 | Partial capture |
| 10-17 18:06 | 40m | -20 / - | RA8CO | - / -6 | 2 | Partial capture |
| 10-17 18:02 | 40m | - / - | OK1BID | -6 / - | 2 | Partial capture |
| 10-17 17:55 | 40m | - / -16 | RA6FCU | +1 / - | 3 | ✓ Closing fragment |
| 10-17 17:50 | 40m | - / -9 | RW6B | -19 / - | 3 | Partial capture |
| 10-17 17:43 | 40m | - / - | CT1BFP | -10 / - | 8 | Partial capture |
| 10-16 18:03 | 80m | -15 / +1 | RW3DBX | -6 / -6 | 4 | ✓ Full exchange observed |
| 10-16 17:57 | 80m | -18 / - | RA8CO | - / -14 | 3 | Partial capture |
| 10-16 17:42 | 80m | - / - | DO1LKG | -13 / - | 4 | Partial capture |
| 10-16 17:38 | 80m | -9 / -11 | RV9WJP | -11 / - | 5 | ✓ Closing observed |
| 10-16 17:34 | 80m | -12 / - | RK4HS | - / +4 | 2 | ✓ Closing fragment |
| 10-16 17:34 | 80m | -12 / - | EU2ABM | -1 / -17 | 5 | Partial capture |
| 10-16 16:41 | 40m | -14 / - | R2BPS | - / -4 | 2 | ✓ Closing fragment |
| 10-16 16:22 | 40m | -10 / - | OH1TEV | -10 / 0 | 3 | Partial capture |
| 10-16 16:22 | 40m | -11 / - | R2EA/P | - / -7 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 030330 -20 1281 CQ RT4A LN28 a1 (x11) 030900 -15 1280 YO6GLT RT4A -04 (x2) 031000 -12 1280 CQ RT4A LN28 (x2)
UTC dB Audio Message 210045 -9 1240 CQ RT4A LN28 (x2) 210400 +0 1239 RT4A DO1OAS JO51 (x2) 211715 -8 1240 CQ RT4A LN28 a1 (x4) 212200 -4 1554 RT4A G4FHL IO94 212215 -10 1241 G4FHL RT4A -14 212245 -5 971 RT4A F6ECB IN94 212300 -6 1554 RT4A G4FHL R-16 212315 +2 3002 RT4A F6ECB IN94 212330 +0 1554 RT4A G4FHL R-16 (x2)
UTC dB Audio Message 101100 -10 2599 RT4A EA3EDU JN01 (x2)
UTC dB Audio Message 180315 +1 2204 RT4A RZ6BS R-16 180315 +4 1137 RT4A R7DX KN84 180345 -2 2204 RT4A RZ6BS R-16 180345 +2 1137 RT4A R7DX KN84 180415 +0 2204 RT4A RZ6BS R-16 181515 -14 2384 RT4A RV6HE -09 181515 -16 1202 RT4A RA4Y LO35 181545 -10 2384 RT4A RV6HE -11 181545 -20 1202 RT4A RA4Y LO35 181545 +4 1137 RT4A R7DX KN84 181615 -12 2384 RT4A RV6HE -22 181615 +7 1137 RT4A R7DX R-18 181645 -13 2383 RT4A RV6HE -14 181645 -15 1202 RT4A RA4Y LO35 181645 +0 1136 RT4A R7DX 73
UTC dB Audio Message 054215 -13 1357 F4AHJ RT4A LN28 054230 -17 1081 RT4A F4AHJ +01 (x2) 054315 -17 1357 F4AHJ RT4A 73 041915 -16 1954 RT4A UB9USV NO33 (x3) 042145 -11 2230 RT4A UA9ZCC R-19 (x2) 170315 -1 1091 CQ RT4A LN28 (x3) 170600 -15 3105 RT4A VU2FR ML88 170615 -6 1092 CQ RT4A LN28 170700 -13 3105 RT4A VU2FR ML88
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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