IU4RWW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IU4RWW, decoded by SO8OO in southeastern Poland. 384 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-06-26.

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 384 FT8 messages attributed to IU4RWW as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 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 (83%); the estimated median was -4.9 dB.

Overview

384
Messages attributed
6
UTC dates decoded
39
Active 15-min windows
-4.9 dB
Estimated median S/N

Bands

20m · 384
First attributed message: 2026-06-08
Last attributed message: 2026-06-26 21:29 UTC

Observed FT8 message patterns

Attributed sample
384 messages
Active dates
6 UTC dates
Estimated median S/N
-4.9 dB
Estimated 10th-90th percentile
-10 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 64, strong (≥ -8 dB) 317.

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 IU4RWW 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 IU4RWW

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
JN54 · 255 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,013 km (approx.)
Last such locator decoded
2026-06-26 21:29 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 UTCBandIU4RWW S/NCounterpartCounterpart S/NMsgsCapture
06-26 21:23 20m -6 / - JA1NVF - / - 13 Partial capture
06-26 21:18 20m -4 / - JA1KIO - / - 8 Partial capture
06-26 21:06 20m -4 / - IU4PPL - / +2 2 ✓ Closing fragment
06-26 21:03 20m -3 / - JF1HQC - / - 4 Partial capture
06-26 20:46 20m -2 / - JA0RUG - / -15 4 ✓ Closing fragment
06-26 20:44 20m -5 / - JH0JLP - / -8 3 Partial capture
06-26 20:39 20m -6 / - JE2IDB - / - 6 Partial capture
06-26 20:35 20m -3 / - JR3DXJ - / - 7 Partial capture
06-26 20:18 20m -4 / - JI1OYZ - / -9 3 ✓ Closing fragment
06-26 20:14 20m 0 / - BA7LUI - / - 2 Partial capture
06-26 19:51 20m -1 / - BH2WTV - / -17 5 ✓ Closing fragment
06-26 19:49 20m -2 / - JG3LGD - / -10 2 ✓ Closing fragment
06-26 19:44 20m -6 / - JG3LGD - / - 2 Partial capture
06-24 22:06 20m -7 / - BD1TX - / -15 2 Partial capture
06-24 22:03 20m -4 / - HL2CFY - / - 2 Partial capture
06-24 22:01 20m -2 / - JH6EFI - / - 4 Partial capture
06-24 21:58 20m -2 / - JA3JFT - / -12 4 ✓ Closing fragment
06-24 21:53 20m -2 / - PZ5TW - / - 6 Partial capture
06-24 21:34 20m -2 / - 7K1PTT - / -13 7 ✓ Closing fragment
06-24 21:31 20m -3 / - W4YGM - / -14 4 Partial capture
06-24 21:14 20m -4 / - HL5YI - / - 3 Partial capture
06-24 21:06 20m -1 / - BG6HVT - / -14 5 ✓ Closing fragment
06-24 20:58 20m -1 / - BI1VUJ - / -16 6 ✓ Closing fragment
06-24 20:52 20m -3 / - UR5WCS - / -5 5 Partial capture
06-24 20:50 20m 0 / - LA4NM - / +2 4 ✓ Closing fragment
06-24 20:48 20m -2 / - SP9DHY - / +3 2 ✓ Closing fragment
06-24 20:46 20m +4 / - EA3GXK - / -4 2 ✓ Closing fragment
06-24 20:44 20m 0 / - RA1QX - / -11 2 ✓ Closing fragment
06-24 20:42 20m -2 / - UT0CK - / +4 2 ✓ Closing fragment
06-24 20:39 20m -4 / - DK3WN/P - / -6 2 ✓ Closing fragment
06-24 20:34 20m -2 / -15 SV1GYG -24 / +6 4 ✓ Full exchange observed
06-24 20:30 20m 0 / - JI3CWI - / - 4 Partial capture
06-24 19:48 20m +3 / - BG6HVT - / - 9 Partial capture
06-24 19:45 20m +2 / - JF0CSK - / -5 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
212215  -5  372  JA1KIO IU4RWW JN54 (x2)
212345  -6  372  JA1NVF IU4RWW JN54 (x13)

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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