NN4RB — 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 NN4RB, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-06.
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 30 FT8 messages attributed to NN4RB as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 80 m (27%) and 20 m (10%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.
Overview
Bands
Last attributed message: 2026-09-06 01:00 UTC
Observed FT8 message patterns
- Attributed sample
- 30 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -24 to -11 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 1.
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 NN4RB in decoded directed-looking exchanges:
Most frequent locator attributed to NN4RB
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
- FM07 · 18 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,591 km (approx.)
- Last such locator decoded
- 2026-09-06 01:00 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 | NN4RB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 01:33 | 40m | - / -10 | OH6RX | +9 / - | 3 | Partial capture |
| 09-06 01:10 | 40m | - / - | IS0/IK2YCW | -10 / - | 2 | Partial capture |
| 09-06 01:09 | 40m | - / - | RD7O | +7 / - | 2 | Partial capture |
| 09-06 00:56 | 40m | -14 / - | OZ7SKB/P | - / - | 7 | Partial capture |
| 09-06 00:39 | 40m | - / - | RD7O | +5 / - | 2 | Partial capture |
| 09-06 00:38 | 40m | - / -14 | UA3DIB | +19 / - | 3 | ✓ Closing fragment |
| 09-06 00:35 | 40m | -11 / -13 | MW9LQA | -5 / - | 5 | Partial capture |
| 09-06 00:30 | 40m | -13 / 0 | OZ7KJ/P | +8 / - | 8 | ✓ Closing observed |
| 09-06 00:24 | 40m | -21 / - | VA2MKT/W1 | - / - | 2 | Partial capture |
| 09-06 00:10 | 40m | -20 / - | OZ7SKB/P | - / -13 | 3 | Partial capture |
| 08-29 01:24 | 40m | - / -13 | CT7AUT | -8 / - | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 005645 -14 2687 OZ7SKB/P NN4RB FM07 (x6) 010330 -16 1286 NN4RB N8FMD EM99 010930 +5 1290 NN4RB RD7O KN98 (x2) 011000 -15 789 <NN4RB> IS0/IK2YCW (x2) 011615 -14 2024 NN4RB IZ8DBJ JN70 013315 +11 1627 NN4RB OH6RX -10 (x3)
UTC dB Audio Message 220115 -9 2452 <...> NN4RB FM07 (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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