SM3EDF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JP81

Receiver-side FT8 activity involving SM3EDF, decoded by SO8OO in southeastern Poland. 71 FT8 messages attributed to this token as transmitter, on 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-31.

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 71 FT8 messages attributed to SM3EDF as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (93%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

71
Messages attributed
12
UTC dates decoded
19
Active 15-min windows
-12 dB
Estimated median S/N

Bands

20m · 71
First attributed message: 2026-06-08
Last attributed message: 2026-08-31 13:51 UTC

Observed FT8 message patterns

Attributed sample
71 messages
Active dates
12 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-21 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 25.

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 SM3EDF 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 SM3EDF

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
JP81 · 36 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,319 km (approx.)
Last such locator decoded
2026-08-31 13:51 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 UTCBandSM3EDF S/NCounterpartCounterpart S/NMsgsCapture
08-31 13:52 20m - / - DL6UM -5 / - 4 Partial capture
08-27 19:40 20m - / -9 8Z1IT -4 / - 2 ✓ Closing fragment
08-27 19:36 20m -5 / - 8Z1IT - / - 2 Partial capture
08-27 19:24 20m -16 / - SA7ORA -14 / - 2 ✓ Closing observed
08-20 18:59 20m - / - R6DBT -5 / - 4 Partial capture
08-20 18:56 20m - / - F4LER -7 / - 9 Partial capture
08-20 18:54 20m - / - SV8GXC -3 / - 7 Partial capture
08-20 18:53 20m - / +8 E70SZ -2 / - 2 Partial capture
08-20 18:51 20m - / -16 M9XZY -2 / - 2 Partial capture
08-20 18:50 20m -20 / - HF7X - / - 2 ✓ Closing fragment
08-20 18:46 20m -10 / - TA2ED - / -12 2 ✓ Closing fragment
08-20 18:44 20m -13 / - R7OV -18 / -1 3 ✓ Full exchange observed
08-20 18:39 20m -11 / - 4L7T +6 / -5 4 ✓ Closing observed
08-11 19:18 20m - / - DJ1TU -24 / - 2 Partial capture
08-11 19:13 20m - / - UR1CCO -17 / - 2 Partial capture
08-11 19:08 20m -18 / +2 PD1HBL -15 / -14 5 ✓ Full exchange observed
08-11 19:06 20m -6 / - ES6DO - / - 2 Partial capture
08-11 19:05 20m - / - F5IXN -9 / - 3 Partial capture
08-11 19:04 20m -2 / -6 SV1GYG -13 / -19 6 ✓ Full exchange observed
08-03 09:51 20m - / +2 PA7ZZ -2 / - 3 Partial capture
07-21 20:56 20m -9 / - LU6XQB - / -14 4 ✓ Closing fragment
07-21 19:31 20m - / - UR4QWW -10 / - 2 ✓ Closing fragment
07-21 19:27 20m - / - F4HSB -18 / - 2 Partial capture
07-21 08:17 20m - / -9 TK5K +6 / - 2 ✓ Closing fragment
07-18 12:08 10m - / - G1OZO -20 / - 2 Partial capture
07-17 13:28 20m - / -15 IK4TVP -13 / - 2 ✓ Closing fragment
07-13 14:32 20m - / -5 SP5ROM +5 / - 3 Partial capture
07-08 17:51 20m - / - EA3HMM +6 / - 2 Partial capture
07-07 17:53 20m - / -1 DH5BM -9 / - 3 ✓ Closing fragment
07-07 17:46 20m - / - DG5PI -4 / - 4 Partial capture
07-04 13:29 20m - / -9 PA2RO -24 / - 2 ✓ Closing fragment
07-04 13:21 20m - / - PE9JAN -9 / - 3 Partial capture
07-04 12:39 20m - / - PA3MVD -13 / - 2 Partial capture
06-30 13:14 10m - / -6 PD1HPB -12 / - 10 Partial capture
06-23 21:38 20m - / - M5MOW -18 / - 3 Partial capture
06-23 19:58 20m -10 / - PY2SAO - / -16 5 ✓ Closing fragment
06-23 19:50 20m - / -12 PD0HLA 0 / - 4 Partial capture
06-23 19:43 20m +1 / - BI8SCC - / -16 3 ✓ Closing fragment
06-23 14:31 20m - / - PD1ADA -18 / - 3 Partial capture
06-23 14:30 20m - / - F5IXN -5 / - 3 Partial capture
06-23 14:28 20m - / - PD0HLA -15 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
190045  -4 2051  SM3EDF R6DBT KN94 (x2)
190115 -14 1154  SM3EDF F4LER JN18
192445 -16 2223  SA7ORA SM3EDF JP81
192530 -14 2222  SM3EDF SA7ORA RR73
193615  -5  630  8Z1IT SM3EDF JP81 (x2)
194000  -4  633  SM3EDF 8Z1IT -09 (x2)
135145 +13  648  CQ SM3EDF JP81
135200  +0 1124  SM3EDF IU5HIU JN53
135230 -11 1334  SM3EDF DL6UM JO60 (x4)
10m 
UTC    dB Audio  Message
110930 -14  913  SM3EDF GB2WWA +05
131400 -13  902  SM3EDF PD1HPB JO22 (x10)
115915  -7 2591  SM3EDF PD0HLA -10 (x2)
120845 -20 2141  SM3EDF G1OZO JO00 (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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