ES4RR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ES4RR, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-09-17.
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 7 FT8 messages attributed to ES4RR as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (57%), followed by 40 m (43%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-17 20:22 UTC
Observed FT8 message patterns
- Attributed sample
- 7 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -18 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with ES4RR in decoded directed-looking exchanges:
Most frequent locator attributed to ES4RR
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
- KO49 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,158 km (approx.)
- Last such locator decoded
- 2026-09-17 20:22 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 | ES4RR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 17:50 | 80m | -16 / - | RA2FU | - / - | 3 | ✓ Closing fragment |
| 09-17 17:46 | 80m | - / -16 | RW1AI | -4 / - | 2 | ✓ Closing fragment |
| 08-30 05:51 | 20m | - / -6 | F1MXE | -2 / - | 6 | ✓ Closing fragment |
| 08-30 05:51 | 20m | - / -3 | UA4FEN | -10 / - | 2 | ✓ Closing fragment |
| 08-30 05:45 | 20m | - / - | EA1IOK | -7 / - | 3 | Partial capture |
| 08-29 20:46 | 160m | - / -17 | RN1CW | -3 / - | 3 | ✓ Closing fragment |
| 08-29 20:45 | 160m | - / -5 | ES5MG | -5 / - | 2 | ✓ Closing fragment |
| 08-26 17:56 | 40m | - / - | 4Z5MU | -20 / - | 2 | Partial capture |
| 08-26 17:56 | 40m | - / - | LZ2VQ | +9 / - | 3 | Partial capture |
| 08-26 17:53 | 40m | -16 / - | ES4TIX | -4 / - | 3 | ✓ Closing observed |
| 08-01 07:39 | 10m | - / -18 | TA1BX | -14 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 174600 -4 2258 ES4RR RW1AI -16 (x2) 175000 -13 2106 RA2FU ES4RR KO49 (x3) 202200 -18 630 5P1KZX ES4RR KO49 202245 +2 2926 ES4RR DK2MAX JN58
UTC dB Audio Message 175345 -15 930 ES4TIX ES4RR KO49 175530 -4 624 ES4RR ES4TIX RR73 175545 -18 931 ES4TIX ES4RR 73 175600 +7 2927 ES4RR LZ2VQ KN23 175600 -18 1681 ES4RR 4Z5MU KM72 175630 +7 2927 ES4RR LZ2VQ KN23 175630 -21 1681 ES4RR 4Z5MU KM72 175700 +14 2927 ES4RR LZ2VQ KN23 201045 -19 2155 RI1FJZ ES4RR KO49
UTC dB Audio Message 054530 -4 578 ES4RR EA1IOK IN62 (x3) 055100 -24 1544 ES4RR F9DK 73 055130 -13 1159 ES4RR UA4FEN -03 055130 -3 337 ES4RR F1MXE JN05 055200 -7 1159 ES4RR UA4FEN RR73 055200 -3 337 ES4RR F1MXE JN05 (x5)
UTC dB Audio Message 204545 -5 1592 ES4RR ES5MG -05 (x2) 204645 -4 1443 ES4RR RN1CW KO59 (x3)
UTC dB Audio Message 073915 -12 1271 ES4RR TA1BX -18 (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.
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