IU4AOS — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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

Receiver-side FT8 activity involving IU4AOS, decoded by SO8OO in southeastern Poland. 32 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-11-06.

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 32 FT8 messages attributed to IU4AOS as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (47%), followed by 40 m (22%) and 160 m (19%). Several six-hour UTC windows tied for the largest share (63%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

160m · 6 80m · 15 40m · 7 20m · 4

First attributed message: 2026-06-27
Last attributed message: 2026-11-06 02:01 UTC

Observed FT8 message patterns

Attributed sample: 32 messages
Active dates: 8 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -24 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 5.

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 IU4AOS in decoded directed-looking exchanges:

DK7ZT · Fed. Rep. of Germany IW4AOT · Italy OK1DXR · Czech Republic RU3GF · European Russia ES6DO · Estonia N1EN · United States 5B4AMX · Cyprus AO5CV · Spain E71AGA · Bosnia-Herzegovina EA1IOK · Spain F5HNQ · France IQ4JO · Italy

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 IU4AOS

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 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-11-06 01:40 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	IU4AOS S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 01:59	80m	-10 / -6	OK1UOZ	+3 / -15	3	✓ Full exchange observed
11-06 01:59	80m	-11 / -13	EA1IOK	-5 / -23	7	✓ Full exchange observed
11-06 01:58	80m	-7 / -13	SP5EXA	+11 / -	4	✓ Closing observed
11-06 01:40	80m	-14 / -	VE3DZ	- / -	2	Partial capture
11-06 01:37	80m	-15 / -19	5B4AMX	-3 / -7	4	✓ Full exchange observed
11-06 01:11	80m	- / -19	IQ4JO	+9 / -	3	✓ Closing fragment
11-02 20:39	160m	- / -25	OE3KJO	+5 / -	5	Partial capture
11-01 20:45	160m	- / -19	DK7ZT	-12 / -	2	✓ Closing fragment
11-01 20:45	160m	- / -	OE8RPK	-18 / -	2	Partial capture
11-01 20:41	160m	- / -14	9A4ZM	-6 / -	2	Partial capture
10-31 23:01	160m	-24 / -22	OK1DXR	-10 / -15	6	✓ Full exchange observed
10-31 16:51	80m	-10 / -1	E71AGA	+4 / -5	4	✓ Full exchange observed
10-28 19:29	80m	- / -22	F5HNQ	-4 / -	2	✓ Closing fragment
10-26 20:02	80m	-12 / -8	OM2IB	+15 / -	3	✓ Closing observed
10-25 19:08	40m	-14 / -16	ES6DO	-9 / -25	10	✓ Full exchange observed
10-11 22:24	80m	-16 / -	9A4AA	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
053530 -20 1740  K0HB IU4AOS JN54
190830 -15 1740  ES6DO IU4AOS JN54 (x3)
191015  -4  340  IU4AOS ES6DO -16 (x3)
191130 -16 1740  ES6DO IU4AOS R-25 (x2)
191215  -7  341  IU4AOS ES6DO RR73
191230 -12 1740  ES6DO IU4AOS R-25
020615 -11  472  IU4AOS N1EN RR73

80m

UTC    dB Audio  Message
014030 -15 1703  VE3DZ IU4AOS JN54
015830  +8 1704  IU4AOS SP5EXA KO02 (x2)
015915  -7 1704  SP5EXA IU4AOS RR73
015930 +11 1704  IU4AOS SP5EXA 73
015930 -12  700  IU4AOS EA1IOK IN62
015945  -6 1704  OK1UOZ IU4AOS -15
020000  +3 1704  IU4AOS OK1UOZ R-06
020000  -7  700  IU4AOS EA1IOK IN62
020015 -15 1704  OK1UOZ IU4AOS RR73
020030  -4  700  IU4AOS EA1IOK IN62
020045 -11 1704  EA1IOK IU4AOS -23
020100  -2  700  IU4AOS EA1IOK R-13
020115 -11 1704  EA1IOK IU4AOS RR73
020130  +0  700  IU4AOS EA1IOK 73

160m

UTC    dB Audio  Message
204100 -21 1703  CQ IU4AOS JN54
204115  -6 1699  IU4AOS 9A4ZM JN86 (x2)
204545 -18 1843  IU4AOS OE8RPK JN76
204545 -12 1757  IU4AOS DK7ZT -19
204615 -17 1843  IU4AOS OE8RPK JN76
204615 -13 1758  IU4AOS DK7ZT RR73
204930 -24 1703  CQ IU4AOS JN54                        a1
205015 -16 2200  IU4AOS IW4AOT -13 (x2)
203900 +11 1581  IU4AOS OE3KJO -25 (x5)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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