IZ5JMZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IZ5JMZ, decoded by SO8OO in southeastern Poland. 81 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-09-05.

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 81 FT8 messages attributed to IZ5JMZ as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (59%), followed by 20 m (17%) and 10 m (12%). Several six-hour UTC windows tied for the largest share (54%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (89%); the estimated median was +3 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+3 dB

Estimated median S/N

Bands

80m · 48 60m · 4 40m · 5 20m · 14 10m · 10

First attributed message: 2026-06-17
Last attributed message: 2026-09-05 05:14 UTC

Observed FT8 message patterns

Attributed sample: 81 messages
Active dates: 11 UTC dates
Estimated median S/N: +3 dB
Estimated 10th-90th percentile: -9 to +17 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 72.

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 IZ5JMZ in decoded directed-looking exchanges:

7Q3WS · Malawi PV8AJ · Brazil 4O7CC · Montenegro KF9UG · United States RY9C · Asiatic Russia

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 IZ5JMZ

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: JN53 · 71 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-09-05 05:14 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	IZ5JMZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-05 05:13	80m	+8 / -	KZ7Y	- / -	3	Partial capture
09-05 05:09	80m	+11 / -	KZ7Y	- / -	3	Partial capture
09-03 22:16	80m	-8 / -	RI1FJL	- / -	6	Partial capture
09-03 22:07	80m	-6 / -	RI1FJL	- / -	6	Partial capture
09-02 20:26	80m	-6 / -	JH4ADV	- / -	3	Partial capture
09-01 21:32	80m	- / -	LZ2VQ	+9 / -	3	Partial capture
09-01 21:31	80m	-5 / +3	4O7CC	+8 / -5	4	✓ Full exchange observed
08-31 19:03	80m	-9 / -	VK4DAD	- / -	2	Partial capture
08-30 18:35	80m	-5 / -14	RY9C	+7 / -	2	✓ Closing observed
08-27 05:11	80m	+4 / -	AC8RJ	- / -	7	Partial capture
08-27 03:34	80m	+6 / -	AC8RJ	- / -	9	Partial capture
08-27 03:33	80m	- / -	DO9BAU	+1 / -	12	Partial capture
08-27 03:31	80m	+8 / -	KF9UG	- / -21	5	✓ Closing fragment
07-31 22:43	60m	+19 / -	VO1NC	- / -	2	Partial capture
07-31 22:39	60m	+17 / -	TJ1GD/P	- / -	2	Partial capture
07-17 18:14	40m	+7 / -	VJ6X	- / -	5	Partial capture
06-30 13:31	10m	+22 / -	KP4WWA	- / -18	2	Partial capture
06-30 13:28	10m	+16 / -	PV8AJ	- / -14	4	✓ Closing fragment
06-30 13:24	10m	+15 / -	7Q3WS	- / -15	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
221015  -5 2946  RI1FJL IZ5JMZ JN53 (x9)
050900 +10 2940  KZ7Y IZ5JMZ JN53 (x6)

60m

UTC    dB Audio  Message
223915 +17 3011  TJ1GD/P IZ5JMZ JN53 (x2)
224300 +18 3011  VO1NC IZ5JMZ JN53 (x2)

40m

UTC    dB Audio  Message
181445  +7 2915  VJ6X IZ5JMZ JN53 (x5)

10m

UTC    dB Audio  Message
132445 +20 2965  7Q3WS IZ5JMZ JN53 (x4)
132815 +16 2967  PV8AJ IZ5JMZ JN53 (x4)
133115 +23 2969  KP4WWA IZ5JMZ JN53 (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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