YO2OS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN15

Receiver-side FT8 activity involving YO2OS, decoded by SO8OO in southeastern Poland. 101 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-09-03.

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 101 FT8 messages attributed to YO2OS as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (94%), followed by 80 m (4%) and 20 m (2%). Several six-hour UTC windows tied for the largest share (79%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

101

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 4 40m · 95 20m · 2

First attributed message: 2026-07-07
Last attributed message: 2026-09-03 21:20 UTC

Observed FT8 message patterns

Attributed sample: 101 messages
Active dates: 7 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -16 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 58, strong (≥ -8 dB) 27.

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 YO2OS in decoded directed-looking exchanges:

EW8AAC · Belarus ×2 HZ1TT · Saudi Arabia ×2 2I0WMN · Northern Ireland 9K2GR · Kuwait CT7AUT · Portugal UA4FEN · European Russia WK2M · United States C31CT · Andorra DJ0MAB · Fed. Rep. of Germany EA3JAQ · Spain IZ5NFD · Italy MM0HVU · Scotland

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 YO2OS

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: KN15 · 60 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 502 km (approx.)
Last such locator decoded: 2026-09-03 21:20 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	YO2OS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-03 21:06	40m	-9 / -	EX7CQ	- / -	4	Partial capture
09-03 21:04	40m	-11 / -	RI1FJL	- / -22	4	✓ Closing fragment
09-03 21:00	40m	-6 / -17	EX7CQ	-8 / -7	11	Partial capture
09-03 20:55	40m	-8 / -	CN8NS	- / -	4	Partial capture
08-31 19:32	40m	-9 / -	IR7MGGC	- / -	3	Partial capture
08-31 19:28	40m	-20 / -	IU3WOZ	- / -	2	Partial capture
08-31 19:27	40m	-13 / -	IZ5NFD	-20 / -	2	✓ Closing observed
08-31 19:15	40m	-10 / -	IR7MGGC	- / -	5	Partial capture
08-31 18:57	40m	-14 / -4	R3KFT	-3 / -3	4	✓ Full exchange observed
08-31 18:56	40m	-15 / -	EW8AAC	-5 / -2	5	✓ Closing observed
08-31 18:52	40m	- / -	RA3VAN	0 / -	5	✓ Closing fragment
08-31 18:49	40m	- / -17	YO4GIY	-8 / -	2	✓ Closing fragment
08-27 14:13	40m	-12 / -	UA3SCF	- / -	2	Partial capture
08-27 14:08	40m	-16 / -	RW6AU	- / -	3	Partial capture
08-27 14:05	40m	-12 / -	R6ZL	- / -14	3	✓ Closing fragment
08-27 14:03	40m	-11 / -	R3DMS	- / -	3	Partial capture
08-27 14:02	40m	-12 / +4	S57TW	+3 / +10	5	✓ Full exchange observed
08-27 14:00	40m	-14 / -	DJ0MAB	- / -14	4	✓ Closing fragment
08-25 20:32	40m	-9 / -23	RL3K	-9 / -17	12	✓ Full exchange observed
08-25 20:29	40m	-9 / -	R2EA/P	- / -1	3	✓ Closing fragment
08-25 20:25	40m	-11 / -	EA1EU	- / -	5	Partial capture
08-25 20:24	40m	-10 / -	EA3JAQ	-21 / -6	4	✓ Closing observed
08-25 20:21	40m	-14 / -18	C31CT	-9 / -5	5	✓ Full exchange observed
08-25 20:17	40m	-7 / -	HZ1TT	- / -6	5	✓ Closing fragment
08-25 20:14	40m	-8 / -	TN8GD	- / -24	5	✓ Closing fragment
08-15 20:05	20m	- / -12	WK2M	0 / -	2	✓ Closing fragment
08-15 19:53	20m	- / -8	UA4FEN	+8 / -	2	✓ Closing fragment
08-13 20:28	20m	-24 / -12	2I0WMN	-13 / -	6	✓ Closing observed
07-31 20:17	20m	- / -8	CT7AUT	-8 / -	3	✓ Closing fragment
07-09 17:57	80m	-19 / -	4Z5AV	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
210245 -11 1550  EX7CQ YO2OS R-07
210300  -6 1735  YO2OS EX7CQ -13
210315  +0 1550  EX7CQ YO2OS R-06 (x3)
210445 -13 1548  RI1FJL YO2OS KN15 (x4)
210645 -10 1546  EX7CQ YO2OS KN15 (x4)
212045 -19 1537  UG0B YO2OS KN15
213345 -16 1733  YO2OS MM0HVU RR73

20m

UTC    dB Audio  Message
201745 -10 1487  YO2OS CT7AUT IM67 (x3)
202530 -20 2017  YO2OS 9K2GR RR73
202800 -24 1401  2I0WMN YO2OS KN15
202815 -11 1771  YO2OS 2I0WMN -12 (x5)
205015  -5  444  YO2OS VE3ARF -20
195300  +8 1714  YO2OS UA4FEN -08 (x2)
200545  +1  743  YO2OS WK2M -12 (x2)

80m

UTC    dB Audio  Message
175445  -7 1516  <...> YO2OS KN15
175700 -20 1515  4Z5AV YO2OS KN15 (x3)

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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