IU4AOP — 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 IU4AOP, decoded by SO8OO in southeastern Poland. 183 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-30.

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 183 FT8 messages attributed to IU4AOP as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 10 m (14%) and 40 m (10%). Several six-hour UTC windows tied for the largest share (81%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

183

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 4 40m · 18 20m · 136 10m · 25

First attributed message: 2026-06-08
Last attributed message: 2026-10-30 08:40 UTC

Observed FT8 message patterns

Attributed sample: 183 messages
Active dates: 28 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -19 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 70, moderate (-15 to -9 dB) 74, strong (≥ -8 dB) 39.

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 IU4AOP in decoded directed-looking exchanges:

DJ0MAB · Fed. Rep. of Germany ×2 HA1ZW · Hungary ×2 F4DHL · France RA4PIS · European Russia 9A4ZM · Croatia DD0AM · Fed. Rep. of Germany DL1TRK · Fed. Rep. of Germany OH3OJ · Finland PE1NPS · Netherlands S59WT · Slovenia SP5HQZ · Poland SP6FME · Poland

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 IU4AOP

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 · 104 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-30 08:39 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	IU4AOP S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-30 08:46	40m	- / -9	DL1TRK	-4 / -	2	✓ Closing fragment
10-30 08:39	40m	-18 / -	9A5ZD	- / +3	4	Partial capture
10-28 07:41	40m	-14 / 0	DJ0MAB	0 / -	4	✓ Full exchange observed
10-23 07:53	40m	- / -11	OK1HEH	-12 / -	4	Partial capture
10-23 07:52	40m	- / -	OK2CNI	0 / -	6	Partial capture
10-23 07:52	40m	-16 / -6	SP6FME	-3 / -	6	✓ Full exchange observed
10-23 07:51	40m	-19 / -15	OH3OJ	-5 / -	3	✓ Closing observed
10-12 06:00	40m	-10 / -	EA6BH	- / -	2	Partial capture
10-12 05:53	40m	- / -	DK7ZT	+4 / -	2	Partial capture
10-12 05:53	40m	- / -14	PE1NPS	-6 / -	3	✓ Closing fragment
10-12 05:51	40m	-12 / -	W4PSK	- / -16	3	✓ Closing fragment
10-05 06:05	80m	-20 / -13	DO4DXA	+8 / -	3	✓ Closing observed
09-30 06:34	40m	- / -8	S59WT	-10 / -	2	✓ Closing fragment
09-23 07:37	40m	- / -8	DK7ZT	-14 / -	3	Partial capture
09-23 07:36	40m	- / -18	YO2UKG	+15 / -	2	✓ Closing fragment
09-23 07:01	40m	- / -21	ZA5G	-10 / -	2	✓ Closing fragment
09-21 05:56	40m	- / -15	SP5HQZ	+1 / -	2	✓ Closing fragment
09-21 05:28	80m	- / -7	DK7ZT	-5 / -	2	✓ Closing fragment
09-21 05:27	80m	- / -8	HB9EFK	-1 / -	2	✓ Closing fragment
09-21 05:19	80m	- / -24	MI0NWA	-9 / -	3	Partial capture
09-16 06:17	40m	- / -11	DK7ZT	-9 / -	3	Partial capture
09-16 06:17	40m	- / -	PE1NPS	-14 / -	2	Partial capture
09-11 07:02	80m	- / -19	DL0ZB	-9 / -	3	Partial capture
09-09 06:13	40m	- / +1	DK7ZT	-9 / -	2	Partial capture
09-09 06:11	40m	- / -11	Z68PX	-16 / -	3	✓ Closing fragment
09-09 06:05	40m	- / -1	DK7ZT	-2 / -	3	Partial capture
09-04 06:07	40m	- / -15	AM42SDC	-4 / -	3	Partial capture
09-04 05:47	80m	-18 / -14	OE6TNO	-1 / -	4	✓ Closing observed
09-02 07:16	80m	- / -20	DK7ZT	-16 / -	5	Partial capture
08-31 06:35	40m	- / -14	9A4ZM	-1 / -	3	✓ Closing fragment
08-31 06:34	40m	- / -12	HA1ZW	0 / -	2	✓ Closing fragment
08-30 06:37	20m	- / -20	RA4PIS	0 / -	2	✓ Closing fragment
08-28 09:40	20m	-18 / +6	F4DHL	-1 / +3	5	✓ Full exchange observed
08-28 08:25	20m	- / 0	EA1FMJ	+2 / -	2	Partial capture
08-24 07:17	40m	- / -12	DK7ZT	-17 / -	3	Partial capture
08-24 07:11	40m	- / -20	HA1ZW	-1 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
075500 -16 1729  IU4AOP OK1HEH -10
075530  +3 2464  IU4AOP OK2CNI JN79
074115 -11 1084  DJ0MAB IU4AOP JN54
074130  +0 1071  IU4AOP DJ0MAB +00
074145 -17 1084  DJ0MAB IU4AOP R+15
074200  +1 1071  IU4AOP DJ0MAB RR73
083445 -19 1084  IQ0AK IU4AOP R+12
083600 -24 1831  IU4AOP OS4K +03
083915 -19 1083  9A5ZD IU4AOP JN54 (x4)
084615  -3  515  IU4AOP DL1TRK -09 (x2)
084945 -12 1907  IU4AOP DK7ZT -02

80m

UTC    dB Audio  Message
054900 -18 1048  OE6TNO IU4AOP 73
070245  -6  917  IU4AOP DL0ZB -19 (x3)
051900  -7  713  IU4AOP MI0NWA -24 (x3)
052715  -3  432  IU4AOP HB9EFK -08 (x2)
052815  -5 1148  IU4AOP DK7ZT -07 (x2)
055845 -16 1048  AO5CV IU4AOP JN54
060530 -21 1048  DO4DXA IU4AOP JN54
060545  +8  506  IU4AOP DO4DXA -13
060630 -19 1048  DO4DXA IU4AOP 73

20m

UTC    dB Audio  Message
061700 -24 1118  W4IMD IU4AOP R+01
082545  +2  384  IU4AOP EA1FMJ +00 (x2)
084045 -10 2019  IU4AOP YO9PH -13
094030 -20 1118  F4DHL IU4AOP JN54
094045  -2 1006  IU4AOP F4DHL +06
094100 -16 1117  F4DHL IU4AOP R+03
094115  +0 1006  IU4AOP F4DHL RRR
094130 -18 1117  F4DHL IU4AOP 73
063745  -1  888  IU4AOP RA4PIS -20 (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.

CW

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

Explore CW reception at SO8OO

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