F4DIF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN99

Receiver-side FT8 activity involving F4DIF, decoded by SO8OO in southeastern Poland. 96 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-09-08.

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 96 FT8 messages attributed to F4DIF as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (96%), followed by 40 m (4%). Most decodes (64%) 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 -13 dB.

Overview

96
Messages attributed
17
UTC dates decoded
37
Active 15-min windows
-13 dB
Estimated median S/N

Bands

40m · 4 20m · 92
First attributed message: 2026-06-18
Last attributed message: 2026-09-08 07:39 UTC

Observed FT8 message patterns

Attributed sample
96 messages
Active dates
17 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-21 to -5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 33, moderate (-15 to -9 dB) 43, strong (≥ -8 dB) 20.

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 F4DIF 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 F4DIF

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
IN99 · 68 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,633 km (approx.)
Last such locator decoded
2026-09-08 07:39 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 UTCBandF4DIF S/NCounterpartCounterpart S/NMsgsCapture
09-03 10:16 40m - / -3 PE9JAN -11 / - 3 Partial capture
09-02 20:25 40m -13 / - JG3TRB - / - 2 Partial capture
08-31 15:25 20m -5 / - BV2NF - / - 2 Partial capture
08-27 13:57 40m - / - DJ0MAB -22 / - 2 Partial capture
08-24 15:36 20m -3 / - BI4XDT - / - 2 Partial capture
08-24 15:21 20m -12 / -16 JA5SUD -5 / -10 4 ✓ Full exchange observed
08-24 14:46 20m -16 / - F4NGR - / -15 3 Partial capture
08-22 15:49 20m - / -15 7K1CPT -5 / - 2 Partial capture
08-22 13:09 20m -20 / -3 II7MGBT -6 / -20 3 Partial capture
08-20 15:08 40m - / +2 ON8PR -18 / - 2 ✓ Closing fragment
08-20 14:49 40m - / -15 F4EIK -16 / - 2 ✓ Closing fragment
08-17 16:12 20m -17 / - <...> - / - 3 Partial capture
08-17 14:07 20m -16 / - SH4UMN - / - 2 Partial capture
08-17 13:09 20m - / -5 F4HTA +6 / - 2 ✓ Closing fragment
08-17 10:02 20m - / -5 SH5RJX -19 / - 3 Partial capture
08-17 09:52 20m - / -5 F4FSY -12 / - 2 ✓ Closing fragment
08-17 08:22 20m -20 / - YV5JLO - / - 2 Partial capture
08-09 19:47 20m -14 / - SP6FME - / - 2 ✓ Closing fragment
08-09 19:42 20m - / -3 EN35UKR -2 / - 4 Partial capture
08-09 19:36 20m -15 / - EH1SGG - / -19 3 Partial capture
08-09 19:33 20m -14 / - UN8DSW - / -19 3 Partial capture
08-09 19:29 20m -20 / - <...> - / -17 2 Partial capture
07-24 12:18 20m - / -4 PE9JAN -4 / - 2 ✓ Closing fragment
07-23 17:18 20m -18 / - BG7BVI - / - 2 Partial capture
07-23 12:09 20m - / -1 R70OBN -9 / - 2 Partial capture
07-23 11:29 20m - / -10 UA9LAO -10 / - 2 ✓ Closing fragment
07-23 07:54 20m -19 / - ZA5G - / -20 4 ✓ Closing fragment
07-23 07:51 20m - / -9 TK5K -4 / - 2 ✓ Closing fragment
07-18 13:39 20m - / -15 UT7UJ +6 / - 4 Partial capture
07-13 20:47 20m -12 / - MD0CCE - / - 2 Partial capture
07-13 20:42 20m -16 / - VR2KF - / - 5 Partial capture
07-13 20:36 20m -9 / - LU3DLY - / - 5 Partial capture
07-13 19:27 20m -16 / - EG7VER - / - 2 Partial capture
07-03 13:12 20m - / - F4NGK -19 / - 2 ✓ Closing fragment
07-03 08:52 20m -10 / - <...> - / - 3 Partial capture
06-30 09:06 20m - / -11 DK7UY -2 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
144900 -18 1387  F4DIF F4EIK -15 (x2)
150800 -17 1737  F4DIF ON8PR +02 (x2)
135600 -10  490  F4DIF F1PBZ -07
135700 -24 1867  F4DIF DJ0MAB JN49 (x2)
202545 -14 2355  JG3TRB F4DIF IN99 (x2)
202645 -13 1301  TC2EYL F4DIF IN99
101630  -8  488  F4DIF PE9JAN JO22 (x3)
073945 -20 2333  HK3TY F4DIF IN99
092900  -7 1881  F4DIF SQ100PKP -05
20m 
UTC    dB Audio  Message
152100  -7 1844  JA5SUD F4DIF IN99
152115  -6 1844  F4DIF JA5SUD -16
152130 -16 1844  JA5SUD F4DIF R-10
152145  -4 1844  F4DIF JA5SUD RR73
153400  -7 2194  BI4XDT F4DIF IN99 (x3)
153845  -3 1677  F4DIF EA3AAY JN11
091030 -15 2012  F4DIF IR7MGGC +03
091915 -23 1876  R1530IG F4DIF IN99
105615 -10  627  <...> F4DIF IN99
085600 -12 1556  YV5JLO F4DIF IN99
074600 -21 1077  HI8WRA F4DIF R-26
152500  -2  431  BV2NF F4DIF IN99 (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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