OM5TA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovak Republic Most frequent locator attributed to this token: JN97

Receiver-side FT8 activity involving OM5TA, decoded by SO8OO in southeastern Poland. 142 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-07-18 and 2026-08-28.

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 142 FT8 messages attributed to OM5TA as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (70%), followed by 20 m (18%) and 40 m (13%). Most decodes (87%) fell within the six-hour window 19:00-01:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was +3 dB.

Overview

142

Messages attributed

UTC dates decoded

Active 15-min windows

+3 dB

Estimated median S/N

Bands

80m · 99 40m · 18 20m · 25

First attributed message: 2026-07-18
Last attributed message: 2026-08-28 23:49 UTC

Observed FT8 message patterns

Attributed sample: 142 messages
Active dates: 6 UTC dates
Estimated median S/N: +3 dB
Estimated 10th-90th percentile: -12 to +13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 112.

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 OM5TA in decoded directed-looking exchanges:

DO1DMR · Fed. Rep. of Germany ×2 DO8JB · Fed. Rep. of Germany ×2 7Z1BM · Saudi Arabia 9A4DK · Croatia CT2KCK · Portugal EX7DY · Kyrgyzstan F1PBZ · France F5MXH · France JJ1LBJ · Japan MI0NWA · Northern Ireland PD1HBL · Netherlands R3KCW · European Russia

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 OM5TA

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: JN97 · 98 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 340 km (approx.)
Last such locator decoded: 2026-08-28 23:49 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	OM5TA S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 17:41	20m	- / -15	YO4NF	-11 / -	2	Partial capture
08-30 17:35	20m	- / -18	EX7DY	-18 / -	2	Partial capture
08-30 07:00	20m	- / 0	MI0NWA	-9 / -	2	✓ Closing fragment
08-30 05:30	20m	- / -17	UB4CJS	-3 / -	6	Partial capture
08-30 05:28	20m	- / -4	R3KCW	-2 / -	3	✓ Closing fragment
08-30 05:26	20m	- / -4	TA4SSK	-9 / -	3	✓ Closing fragment
08-28 23:51	40m	- / -	ON4MAP	-15 / -	4	Partial capture
08-28 23:43	40m	- / -19	G0ORC	0 / -	3	Partial capture
08-28 23:38	40m	- / -	TA3NK	-9 / -	9	Partial capture
08-28 23:38	40m	- / -13	UN7PPV	-11 / -	3	Partial capture
08-28 23:33	40m	-7 / -	PV8AJ	- / -	5	Partial capture
08-28 23:23	80m	+1 / -	JY4CI	- / -17	14	Partial capture
08-28 23:19	80m	+7 / -5	DO8JB	-8 / -16	5	✓ Full exchange observed
08-28 13:00	20m	- / +6	F5MXH	-13 / -	3	✓ Closing fragment
08-05 21:33	40m	-14 / -	PY2VOX	- / -	7	Partial capture
08-05 21:08	80m	+6 / -17	EI4JFB	-12 / -	4	✓ Closing observed
08-05 18:59	80m	+7 / -1	DO1DMR	-2 / -10	5	✓ Full exchange observed
08-05 18:55	80m	+8 / -	DL9KM	- / -5	2	✓ Closing fragment
08-05 17:38	20m	- / -	RN4AZ	-12 / -	2	Partial capture
08-03 22:43	20m	- / -	W3FOX	-22 / -	2	✓ Closing fragment
08-03 21:12	80m	+6 / -	C31KC	- / -15	2	Partial capture
08-03 20:33	20m	- / -3	CT2KCK	-22 / -	2	✓ Closing fragment
08-01 10:32	20m	- / -9	PD1HBL	-14 / -	6	✓ Closing fragment
07-28 20:32	80m	+10 / -8	DO1FED	-11 / -8	9	✓ Full exchange observed
07-28 20:31	80m	+14 / -8	R1BDX	-2 / 0	5	✓ Full exchange observed
07-28 20:28	80m	+12 / -9	DL5AX	-6 / +4	5	✓ Full exchange observed
07-28 20:27	80m	+10 / -	CQJA	- / -	2	Partial capture
07-28 12:17	20m	- / -	DL1YS	-16 / -	2	Partial capture
07-28 12:17	20m	- / -	F4HSB	-22 / -	3	Partial capture
07-28 12:17	20m	- / -18	PD3LKN	-15 / -	3	Partial capture
07-28 12:16	20m	- / -	DB1BW	-13 / -	2	Partial capture
07-19 00:25	80m	+4 / -4	HA3GX	+6 / +8	5	✓ Full exchange observed
07-19 00:18	80m	0 / -3	IQ4JO	+5 / +4	5	✓ Full exchange observed
07-19 00:10	80m	+3 / -21	VE1RSM	-22 / -	11	Partial capture
07-18 23:51	80m	+8 / -	TN8GD	- / -	11	Partial capture
07-18 21:56	20m	-11 / -13	HI8J	-11 / -2	3	Partial capture
07-18 21:48	20m	-8 / -	JJ1LBJ	- / -9	8	✓ Closing fragment
07-18 21:46	20m	-10 / -	HL5BPF	- / -	2	Partial capture
07-18 21:41	20m	-9 / -	7Z1BM	- / -8	4	✓ Closing fragment
07-18 21:37	20m	-8 / -	9A5MP	- / -	2	Partial capture
07-18 20:53	80m	+4 / +5	F5KEE	-2 / -1	4	✓ Full exchange observed
07-18 15:09	20m	-4 / -13	IZ5RKH	-8 / +5	3	Partial capture
07-18 15:06	20m	-13 / -12	YO5PHL	-10 / -	4	✓ Closing observed
07-18 14:37	20m	- / -	9A4ZM	-3 / -	4	Partial capture
07-18 14:36	20m	- / +6	9A4DK	-2 / -	7	✓ Closing fragment
07-18 14:36	20m	- / -19	F1PBZ	-11 / -	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
234130 -11 1084  OM5TA TA3NK KM39 (x3)
234330  +2  437  OM5TA G0ORC -19 (x3)
234745 -14 1026  CQ DX OM5TA JN97 (x4)
235100 -16 1386  OM5TA ON4MAP JO20 (x4)
231700 -12  446  OM5TA TJ1GD RR73

20m

UTC    dB Audio  Message
052930  +1 1084  OM5TA R3KCW 73
053000  -8 1183  OM5TA UB4CJS -17
053000 -22  982  OM5TA UB3DQR KO85
053100  -3 1183  OM5TA UB4CJS -17 (x5)
070000 -12  632  OM5TA MI0NWA +00 (x2)
173500 -15 1215  OM5TA EX7DY -18 (x3)
174100 -12 1834  OM5TA YO4NF -15 (x2)

80m

UTC    dB Audio  Message
232345  +1 1191  JY4CI OM5TA R-17 (x13)
233045  -2 1190  CQ DX OM5TA JN97 (x2)

10m

UTC    dB Audio  Message
105200 -14 1252  OM5TA DN9AD JO52

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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