NF4A — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving NF4A, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-31 and 2026-09-21.
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 66 FT8 messages attributed to NF4A as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (94%); the estimated median was -2 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 66 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -2 dB
- Estimated 10th-90th percentile
- -8 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 62.
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 NF4A in decoded directed-looking exchanges:
Most frequent locator attributed to NF4A
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
- EM70 · 25 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,541 km (approx.)
- Last such locator decoded
- 2026-09-21 00:00 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 | NF4A S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-21 00:00 | 40m | 0 / - | IW2MYH | - / -20 | 3 | ✓ Closing fragment |
| 09-20 23:58 | 40m | 0 / - | CX6TU | - / -11 | 3 | ✓ Closing fragment |
| 09-20 23:56 | 40m | +2 / -14 | UA3AGW | -6 / -12 | 5 | ✓ Full exchange observed |
| 09-20 23:55 | 40m | -1 / - | TN8GD | - / - | 2 | Partial capture |
| 09-20 23:53 | 40m | 0 / - | IU8RFW | - / -16 | 2 | Partial capture |
| 09-20 23:51 | 40m | -1 / - | DG1KPC | - / -13 | 2 | ✓ Closing fragment |
| 09-20 23:51 | 40m | 0 / -2 | EB5DFU | -8 / -9 | 7 | ✓ Full exchange observed |
| 09-20 23:50 | 40m | +1 / +9 | W1AW/9 | -22 / -1 | 3 | Partial capture |
| 09-20 23:48 | 40m | +1 / - | VJ6X | - / -16 | 2 | Partial capture |
| 09-20 23:45 | 40m | +2 / - | A61DD | - / - | 2 | Partial capture |
| 09-20 23:43 | 40m | 0 / - | OA4ENG | - / -11 | 2 | Partial capture |
| 09-20 23:41 | 40m | +3 / - | R2EA/P | - / - | 4 | Partial capture |
| 09-20 23:37 | 40m | -4 / - | RV6G/QRP | - / -19 | 2 | Partial capture |
| 09-20 23:34 | 40m | - / - | F6FHZ | -9 / - | 5 | Partial capture |
| 09-20 23:34 | 40m | -4 / -18 | RN6HK | +12 / -16 | 16 | ✓ Full exchange observed |
| 09-20 23:34 | 40m | -5 / - | N4DWD | - / 0 | 2 | ✓ Closing fragment |
| 09-20 23:33 | 40m | -6 / - | I1RJP | - / -10 | 2 | ✓ Closing fragment |
| 09-20 23:32 | 40m | -2 / - | F5NBU | - / -5 | 2 | ✓ Closing fragment |
| 09-20 23:30 | 40m | -3 / -4 | 4X1UF | -17 / -22 | 4 | ✓ Full exchange observed |
| 09-20 23:29 | 40m | -2 / -7 | HZ1TT | -6 / -5 | 6 | ✓ Full exchange observed |
| 08-31 02:29 | 40m | -8 / - | CT7AUT | -12 / -16 | 7 | ✓ Full exchange observed |
| 08-31 02:27 | 40m | -8 / - | US1VM | - / -15 | 2 | ✓ Closing fragment |
| 08-31 02:26 | 40m | -8 / - | 4O7CC | - / -20 | 3 | ✓ Closing fragment |
| 08-31 02:24 | 40m | -8 / - | <...> | - / -10 | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 235445 -1 2850 IK4TVP NF4A R-07 235515 +0 2850 9A3AUH NF4A -15 235545 -1 2850 TN8GD NF4A EM70 (x2) 235645 +2 2850 UA3AGW NF4A EM70 (x2) 235730 -6 1266 NF4A UA3AGW -14 235745 +3 2850 UA3AGW NF4A R-12 (x2) 235845 +3 2850 CX6TU NF4A EM70 (x3) 000015 +0 2850 IW2MYH NF4A EM70 (x3)
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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