I3MDU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN65

Receiver-side FT8 activity involving I3MDU, decoded by SO8OO in southeastern Poland. 41 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.

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 41 FT8 messages attributed to I3MDU as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (93%), followed by 40 m (7%). Most decodes (95%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

41
Messages attributed
6
UTC dates decoded
8
Active 15-min windows
-8 dB
Estimated median S/N

Bands

80m · 38 40m · 3
First attributed message: 2026-06-07
Last attributed message: 2026-09-20 02:45 UTC

Observed FT8 message patterns

Attributed sample
41 messages
Active dates
6 UTC dates
Estimated median S/N
-8 dB
Estimated 10th-90th percentile
-17 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 24.

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 I3MDU 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 I3MDU

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
JN65 · 28 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
821 km (approx.)
Last such locator decoded
2026-09-20 02:44 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 UTCBandI3MDU S/NCounterpartCounterpart S/NMsgsCapture
09-20 02:47 80m - / -9 GM6URC -6 / - 2 ✓ Closing fragment
09-20 02:45 80m -5 / - IZ1HJU -13 / - 2 ✓ Closing observed
09-20 02:39 80m -6 / -9 EA2DYB -2 / -3 4 ✓ Full exchange observed
09-20 02:38 80m 0 / -10 ON4MAP -10 / -8 7 ✓ Full exchange observed
09-20 02:36 80m - / - UX7QV +11 / - 2 Partial capture
09-20 02:35 80m -8 / -3 OM6APJ +16 / -1 6 ✓ Full exchange observed
09-20 02:34 80m -8 / -1 ON1JP -10 / - 2 ✓ Closing observed
09-20 02:31 80m -6 / -8 TF3VS +2 / -4 5 ✓ Full exchange observed
09-19 02:43 80m -7 / - KP4AA - / - 3 Partial capture
09-19 02:39 80m -14 / - KP4AA - / - 2 Partial capture
09-17 20:36 80m -20 / -9 HB9EKJ -24 / -12 4 Partial capture
08-26 23:13 40m +4 / - HS0ZEE - / - 2 Partial capture
06-26 21:07 80m -8 / - PY5XT - / - 3 Partial capture
06-26 02:34 80m - / - IK4LZH +13 / - 4 Partial capture
06-26 02:30 80m - / - IK4LZH +10 / - 4 Partial capture
06-26 02:26 80m - / - IK4LZH +10 / - 4 Partial capture
06-26 02:19 80m - / - IK4LZH +10 / - 4 Partial capture
06-26 02:15 80m - / - IK4LZH +6 / - 4 Partial capture
06-26 02:07 80m - / - G8OO -8 / - 8 Partial capture
06-26 02:06 80m -10 / - <...> - / -4 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
023915  -7 1032  I3MDU ON4MAP JO20
023915  -1 1235  I3MDU EA2DYB R-09
023930  -2 1235  EA2DYB I3MDU RR73
023945 -10 1032  I3MDU ON4MAP JO20
023945  -4 1235  I3MDU EA2DYB 73
024000  +3 1235  ON4MAP I3MDU -08
024015  -9 1032  I3MDU ON4MAP R-10
024030  -4 1235  ON4MAP I3MDU RR73
024045 -11 1032  I3MDU ON4MAP 73
024100  -4 1235  CQ I3MDU JN65 (x2)
024530  -5 1235  IZ1HJU I3MDU RR73
024545 -13 1820  I3MDU IZ1HJU 73
024745  -9 1778  I3MDU GM6URC -09 (x2)
40m 
UTC    dB Audio  Message
231300  +2 2592  HS0ZEE I3MDU JN65 (x2)
231445  -9 1145  TN8GD I3MDU JN65

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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