IU2SJZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN45

Receiver-side FT8 activity involving IU2SJZ, decoded by SO8OO in southeastern Poland. 92 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-08-03.

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 92 FT8 messages attributed to IU2SJZ as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (70%), followed by 10 m (30%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

20m · 64 10m · 28

First attributed message: 2026-06-11
Last attributed message: 2026-08-03 09:14 UTC

Observed FT8 message patterns

Attributed sample: 92 messages
Active dates: 3 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 33, strong (≥ -8 dB) 30.

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 IU2SJZ in decoded directed-looking exchanges:

CT1BFP · Portugal EA4KZ · Spain G0GHL · England G4CFS · England G6PNH · England HK3G · Colombia M7NXS · England M7TUP · England PD3LKN · Netherlands PD3PAM · Netherlands PD4RJ · Netherlands SQ5PTZ · Poland

Most frequent locator attributed to IU2SJZ

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: JN45 · 62 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,075 km (approx.)
Last such locator decoded: 2026-08-03 09:12 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 UTC	Band	IU2SJZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-03 09:13	20m	-13 / -	M7NXS	- / -3	2	✓ Closing fragment
08-03 09:07	20m	-15 / -	HI8UD	- / -	5	Partial capture
08-03 09:03	20m	-13 / -	TF1OL/P	- / -1	4	Partial capture
08-03 08:52	20m	-16 / -	PD3LKN	- / +1	2	✓ Closing fragment
08-03 08:48	20m	-15 / -20	IQ4JO	-8 / -18	5	Partial capture
08-03 08:43	20m	-18 / -	LZ2PAJ	- / -	4	Partial capture
08-03 08:42	20m	-10 / -	G4CFS	- / -	2	✓ Closing fragment
08-03 08:41	20m	-14 / -	EA4KZ	- / -16	2	✓ Closing fragment
08-03 08:38	20m	-10 / -	PD4RJ	- / 0	2	✓ Closing fragment
08-03 08:38	20m	- / -	IQ4JO	-6 / -	2	Partial capture
08-03 08:36	20m	-18 / -	PD3PAM	- / -10	3	✓ Closing fragment
08-03 08:33	20m	-11 / -	SQ5PTZ	- / -8	3	✓ Closing fragment
08-03 08:32	20m	-9 / -	G6PNH	- / -	2	✓ Closing fragment
08-03 08:02	20m	-16 / -	HK3G	- / -9	2	✓ Closing fragment
08-03 07:51	20m	-16 / -	V31DL	- / -	4	Partial capture
08-02 16:30	20m	- / -12	CT1BFP	-18 / -	2	✓ Closing fragment
08-02 14:23	20m	-11 / -	AP2TN	- / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
085430 -18 1371  CQ IU2SJZ JN45
090300 -15 1371  TF1OL/P IU2SJZ JN45 (x4)
090730 -12 1371  HI8UD IU2SJZ JN45 (x5)
091100 -16 1371  CQ IU2SJZ JN45
091200 -19 1371  M7TUP IU2SJZ RR73
091230 -20 1371  CQ IU2SJZ JN45
091330 -17 1371  M7NXS IU2SJZ -03 (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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