IU5NRS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN52

Receiver-side FT8 activity involving IU5NRS, decoded by SO8OO in southeastern Poland. 83 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-17 and 2026-08-21.

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 83 FT8 messages attributed to IU5NRS as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (73%), followed by 20 m (27%). Several six-hour UTC windows tied for the largest share (64%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -4 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

20m · 22 10m · 61

First attributed message: 2026-07-17
Last attributed message: 2026-08-21 16:10 UTC

Observed FT8 message patterns

Attributed sample: 83 messages
Active dates: 5 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -12 to +14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 57.

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 IU5NRS in decoded directed-looking exchanges:

EA5UI · Spain EX7DY · Kyrgyzstan EX8ABR · Kyrgyzstan LY2MM · Lithuania OH1NHX · Finland OZ5BC · Denmark YO6LM · Romania BG7BMG · China BG7BVI · China BH6IDD · China R2EA/P · European Russia YB3GEM · Indonesia

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 IU5NRS

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: JN52 · 29 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,170 km (approx.)
Last such locator decoded: 2026-08-21 16:04 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	IU5NRS S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-21 16:09	20m	+12 / -	BH5HIE	- / -20	3	Partial capture
08-21 16:07	20m	+14 / -	BH6IDD	- / -17	4	✓ Closing fragment
08-21 16:06	20m	- / -	BG0DAP	-15 / -	2	Partial capture
08-21 16:03	20m	+13 / -	YB3GEM	- / -11	8	✓ Closing fragment
08-21 15:55	20m	+15 / -	R2EA/P	- / -9	2	✓ Closing fragment
08-21 15:54	20m	+13 / -5	BG7BMG	-15 / -6	3	✓ Full exchange observed
08-21 15:52	20m	+12 / -6	BG7BVI	-10 / -1	5	✓ Full exchange observed
08-01 16:06	10m	-11 / -	TN8GD	- / -15	8	Partial capture
07-31 10:09	10m	-16 / -	YD7OHC	- / +7	2	Partial capture
07-31 10:02	10m	-13 / -	YO6LM	- / -	2	✓ Closing fragment
07-31 09:53	10m	-5 / -	YE1AJE	- / -7	2	Partial capture
07-31 09:49	10m	-11 / -	BA7OWP	- / -3	2	Partial capture
07-31 09:47	10m	-12 / -	JA6VQA	- / -15	2	Partial capture
07-31 09:40	10m	-6 / -	EA5UI	- / -13	2	✓ Closing fragment
07-31 09:32	10m	-6 / -	DO1WWA	- / +8	2	Partial capture
07-31 09:29	10m	+2 / -	EX7DY	- / -4	3	✓ Closing fragment
07-31 09:22	10m	-4 / -	YC1IFR	- / -11	5	Partial capture
07-19 09:03	10m	+2 / -	OH1NHX	- / +2	6	✓ Closing fragment
07-17 08:03	10m	-8 / -	OZ5BC	- / -9	4	✓ Closing fragment
07-17 08:00	10m	-4 / -	LY2MM	- / +6	3	✓ Closing fragment
07-17 07:58	10m	-5 / -	EX8ABR	- / +3	3	✓ Closing fragment
07-17 07:56	10m	-4 / -	R6DYY	- / -14	2	Partial capture
07-17 07:54	10m	-5 / -	UA4FKT	- / -10	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
160400 +16 2152  YB3GEM IU5NRS JN52 (x6)
160645 -14  326  IU5NRS BG0DAP NN33 (x2)
160730 +14 2152  BH6IDD IU5NRS -17 (x4)
160930 +13 2152  BH5HIE IU5NRS -20 (x3)

10m

UTC    dB Audio  Message
100230 -15 1470  YO6LM IU5NRS R+13 (x2)
100400 -15 1470  DJ7XB IU5NRS RRR
100430 -12 1470  JI4JKO IU5NRS +01
100600 -24 1471  EA3AAY IU5NRS -16
100900 -14 1471  YD7OHC IU5NRS R+07 (x2)
160615 -10 1336  TN8GD IU5NRS JN52 (x8)

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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