US5AT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Ukraine Most frequent locator attributed to this token: KO60

Receiver-side FT8 activity involving US5AT, decoded by SO8OO in southeastern Poland. 73 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-13.

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 73 FT8 messages attributed to US5AT 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 (68%), followed by 10 m (22%) and 80 m (10%). Most decodes (63%) fell within the six-hour window 12:00-18:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (64%); the estimated median was +1 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

80m · 7 40m · 50 10m · 16

First attributed message: 2026-06-13
Last attributed message: 2026-09-13 15:49 UTC

Observed FT8 message patterns

Attributed sample: 73 messages
Active dates: 7 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -16 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 47.

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 US5AT in decoded directed-looking exchanges:

US2YW · Ukraine ×2 DG0OFT · Fed. Rep. of Germany SP2BZ · Poland TK5K · Corsica DH3CW · Fed. Rep. of Germany EX7CQ · Kyrgyzstan OZ9FF · Denmark RC9WC · Asiatic Russia SP6FME · Poland SQ3TR · Poland UX5UW · Ukraine

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 US5AT

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: KO60 · 42 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 799 km (approx.)
Last such locator decoded: 2026-09-13 15:48 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	US5AT S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 15:48	40m	+8 / -8	US2YW	+12 / +3	6	✓ Full exchange observed
09-13 15:45	40m	+7 / +3	UX5UW	+6 / +5	5	✓ Full exchange observed
09-13 15:41	40m	-8 / -	EX7CQ	- / -	3	✓ Closing fragment
09-08 15:28	40m	+7 / -	ZL2NU	- / -15	4	Partial capture
09-08 15:25	40m	+4 / -	SO100PKP	- / -	2	Partial capture
09-08 15:23	40m	+3 / -	BG2GWN	- / -	2	Partial capture
09-08 15:21	40m	+3 / -8	RC9WC	-1 / -	5	✓ Full exchange observed
09-08 15:19	40m	- / -	9A4ZM	0 / -	2	Partial capture
09-08 15:18	40m	+2 / -5	SP100PKP	-14 / -3	3	Partial capture
09-08 15:17	40m	+8 / -	HF100PKP	- / -1	4	Partial capture
09-06 12:17	40m	-11 / -4	SP6FME	-6 / -12	7	✓ Full exchange observed
09-06 12:15	40m	-9 / -10	SQ3TR	+6 / 0	5	✓ Full exchange observed
09-06 12:13	40m	-7 / -14	SQ9SET	-11 / -	3	Partial capture
09-06 12:12	40m	-6 / -	LA1QRO	- / -	2	Partial capture
09-02 10:06	40m	- / -	SM7HJZ	-22 / -	2	Partial capture
09-02 10:04	40m	-19 / -8	DH3CW	-2 / -	4	✓ Closing observed
09-02 09:54	40m	-18 / -	OZ9FF	-18 / -	3	✓ Closing observed
09-02 09:38	10m	- / -12	IK4RVY	-16 / -	2	Partial capture
07-22 07:18	10m	-5 / -	DG0OFT	- / -	3	✓ Closing fragment
07-22 07:17	10m	-24 / -	SP2BZ	- / +2	3	✓ Closing fragment
07-21 17:36	10m	- / -20	TK5K	-4 / -	2	✓ Closing fragment
07-10 17:49	80m	+4 / -3	<...>	+10 / -1	2	Partial capture
07-10 17:41	80m	- / -	UA4FKT	+3 / -	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
154115  -8 1357  EX7CQ US5AT KO60 (x3)
154400  -4 1810  US5AT II6IALU -19
154515  +6 1357  UX5UW US5AT KO60
154530  +7  966  US5AT UX5UW +03
154545  +8 1358  UX5UW US5AT R+05
154600  +4  966  US5AT UX5UW RR73
154615  +8 1358  UX5UW US5AT 73
154815  +9 1358  US2YW US5AT KO60 (x3)
154930 +11 1035  US5AT US2YW R-08
154945  +9 1358  US2YW US5AT RR73
155000 +13 1035  US5AT US2YW 73

10m

UTC    dB Audio  Message
173630  -7  562  US5AT TK5K -20 (x2)
071545 -18 1796  DN9BLN US5AT KO60
071700 -24 1796  SP2BZ US5AT KO60 (x3)
071830  -9 1796  DG0OFT US5AT KO60 (x3)
093845 -14 2003  US5AT IK4RVY -12 (x2)

80m

UTC    dB Audio  Message
174130  -5 2098  CQ US5AT KO60
174145  +3 2097  US5AT UA4FKT LO23
174200  -6 2097  CQ US5AT KO60
174215  +3 2097  US5AT UA4FKT LO23
174230  -6 2097  CQ US5AT KO60
174245  +4 2097  US5AT UA4FKT LO23
174300  -9 1644  CQ US5AT KO60 (x2)
174845  +6 2201  YU65AEC US5AT KO60
174900 +10 2267  US5AT <...> -03
174915  +4 2265  <...> US5AT R-01

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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