WD4NC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM04

Receiver-side FT8 activity involving WD4NC, decoded by SO8OO in southeastern Poland. 28 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-25 and 2026-09-15.

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 28 FT8 messages attributed to WD4NC as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (71%), followed by 40 m (29%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

28
Messages attributed
2
UTC dates decoded
6
Active 15-min windows
-11 dB
Estimated median S/N

Bands

40m · 8 20m · 20
First attributed message: 2026-08-25
Last attributed message: 2026-09-15 23:28 UTC

Observed FT8 message patterns

Attributed sample
28 messages
Active dates
2 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-22 to -6 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 11.

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 WD4NC 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 WD4NC

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
FM04 · 12 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,837 km (approx.)
Last such locator decoded
2026-09-15 23:26 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 UTCBandWD4NC S/NCounterpartCounterpart S/NMsgsCapture
09-15 23:27 40m - / -14 F4CQS -5 / - 3 Partial capture
09-15 23:26 40m -14 / -1 G0COG -16 / -24 6 Partial capture
09-15 23:15 40m - / - KC3WLS -14 / - 2 Partial capture
09-15 23:15 40m - / - WM4K -15 / - 2 Partial capture
09-15 23:07 40m - / -13 F4CQS -6 / - 3 Partial capture
09-15 22:58 40m - / - EA5HM -19 / - 2 Partial capture
09-15 00:00 40m -18 / - WV8U - / +5 2 ✓ Closing fragment
09-14 23:51 40m - / -14 GM6URC -10 / - 5 ✓ Closing fragment
09-14 23:44 40m - / - R3PJV -3 / - 3 Partial capture
09-14 23:44 40m - / - RA6OY +1 / - 5 Partial capture
09-12 00:56 40m - / - TA3NK -12 / - 2 Partial capture
09-12 00:54 40m - / - F4BYA -7 / - 3 Partial capture
09-12 00:41 40m - / - F4BYA +2 / - 2 Partial capture
08-25 22:05 20m -6 / - 4L7T - / - 2 Partial capture
08-25 21:37 20m - / -5 V31DL -10 / - 2 ✓ Closing fragment
08-25 21:20 20m - / - G8NJL +4 / - 4 Partial capture
08-25 21:00 20m -8 / - KG5LRB - / -19 6 ✓ Closing fragment
08-25 20:58 20m -9 / - 3A2MW -7 / -18 5 ✓ Closing observed
08-25 20:51 20m -9 / - F4LEB -5 / -24 7 ✓ Closing observed
08-25 20:47 20m -16 / -24 MW7GQB +3 / -10 4 Partial capture
08-19 21:43 20m - / -19 YV6BXN -19 / - 2 ✓ Closing fragment
08-17 22:16 20m - / -17 EA8DHH -12 / - 2 ✓ Closing fragment
08-17 22:06 20m - / -9 DK9ZQ -8 / - 3 ✓ Closing fragment
08-17 21:35 20m - / -23 9K2GR -17 / - 3 ✓ Closing fragment
08-06 22:38 20m - / -15 9A5E -11 / - 2 ✓ Closing fragment
07-30 00:06 20m - / - IW2DNI -8 / - 4 Partial capture
07-27 01:28 40m - / - OH1EDK -3 / - 3 Partial capture
07-27 01:05 40m - / - OH1EDK -4 / - 4 Partial capture
07-27 01:05 40m - / -15 PC2J -8 / - 4 ✓ Closing fragment
07-27 00:55 40m - / -14 R2AL -1 / - 4 ✓ Closing fragment
07-27 00:42 40m - / - R2AL +6 / - 2 Partial capture
07-27 00:41 40m - / - OK2SPZ -10 / - 2 Partial capture
07-27 00:40 40m - / - A71XX -11 / - 5 Partial capture
07-27 00:40 40m - / -13 EB1LA -18 / - 3 ✓ Closing fragment
07-24 23:34 40m - / - IQ4JO +2 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
231730 -16  855  WD4NC KC3WLS FM29
232245 -22 1731  CQ WD4NC FM04
232315 -22 1730  WM4K WD4NC +14
232445 -24 1731  ON1DGN WD4NC R-16
232545 -23 1730  CQ WD4NC FM04                         a1 (x2)
232630 -17 1592  WD4NC G0COG IO92 (x2)
232700  -6 1730  WD4NC F4CQS -14 (x3)
232815 -14  805  G0COG WD4NC -24
232830 -13 1784  WD4NC G0COG R-01 (x3)
20m 
UTC    dB Audio  Message
210015 -13 2368  KG5LRB WD4NC FM04 (x6)
212045  +1 2369  WD4NC G8NJL IO81 (x4)
213745 -12 1278  WD4NC V31DL -05 (x2)
220430  -6 2369  OY1HJ WD4NC FM04
220530  -6 2369  4L7T WD4NC FM04 (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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