YO3AIO — 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: Romania Most frequent locator attributed to this token: KN34

Receiver-side FT8 activity involving YO3AIO, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-10-17.

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 54 FT8 messages attributed to YO3AIO 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 (80%), followed by 20 m (20%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 43 20m · 11

First attributed message: 2026-06-21
Last attributed message: 2026-10-17 19:22 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 7 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -15 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 28.

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 YO3AIO in decoded directed-looking exchanges:

DG5DR · Fed. Rep. of Germany DL3MIB · Fed. Rep. of Germany F6BEC · France IQ4JO · Italy ON3MOH · Belgium PD4RJ · Netherlands UR3CFC · Ukraine UR5BIO · Ukraine VU3OSA · India

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 YO3AIO

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: KN34 · 35 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 721 km (approx.)
Last such locator decoded: 2026-10-17 19:22 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	YO3AIO S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-17 19:21	40m	-12 / -	YL3QT	- / -	3	Partial capture
10-17 19:18	40m	-9 / -	VU3OSA	- / -23	2	✓ Closing fragment
10-17 19:16	40m	-10 / -3	IQ4JO	-2 / -5	3	✓ Full exchange observed
10-07 18:10	40m	-10 / -	UR5BIO	- / -6	2	✓ Closing fragment
10-07 17:33	40m	+4 / -	F6BEC	-1 / -15	5	✓ Closing observed
10-07 17:31	40m	-4 / -14	UR3CFC	+4 / -3	5	✓ Full exchange observed
10-07 17:27	40m	0 / -	US2UM	- / -6	3	Partial capture
10-07 17:22	40m	- / -11	DL3MIB	+6 / -	7	✓ Closing fragment
10-07 17:19	40m	-5 / -17	UA4FEN	-15 / -3	3	Partial capture
10-07 17:17	40m	-10 / -	UT2SQ	- / -1	2	Partial capture
10-04 20:25	40m	- / -14	9K2MP	-14 / -	2	Partial capture
10-04 20:21	40m	+2 / -	HL3KPJ	- / -	4	Partial capture
07-25 17:02	20m	- / -	DL1R	-1 / -	8	Partial capture
07-25 16:58	20m	-20 / -	S21VHF	- / -	2	Partial capture
07-25 16:56	20m	-23 / -	YB3CUG	- / -	2	Partial capture
07-25 16:53	20m	- / -22	DG5DR	+2 / -	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
180945  -8 2491  CQ YO3AIO KN34 (x2)
181045 -13 2491  UR5BIO YO3AIO R-06 (x2)
181215 -15 1882  CQ YO3AIO KN34 (x3)
191600 -11 2659  IQ4JO YO3AIO -05
191615  -2 2105  YO3AIO IQ4JO R-03
191630 -10 2658  IQ4JO YO3AIO RR73
191815  -8 2548  VU3OSA YO3AIO R-23 (x2)
192145 -11 2515  YL3QT YO3AIO KN34 (x3)

20m

UTC    dB Audio  Message
165345  -1  779  YO3AIO DG5DR JN69 (x3)
165600 -24 1969  YB3CUG YO3AIO KN34 (x2)
165800 -21 1970  S21VHF YO3AIO KN34 (x2)
170215  -4 2670  YO3AIO DL1R JN58 (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.

CW

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

Explore CW reception at SO8OO

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