ON5AJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO11

Receiver-side FT8 activity involving ON5AJ, decoded by SO8OO in southeastern Poland. 147 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 13 UTC dates in the available aggregate history. Observed between 2026-07-14 and 2026-09-08.

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 147 FT8 messages attributed to ON5AJ as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 10 m (14%) and 40 m (10%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

147

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 9 60m · 6 40m · 14 20m · 98 10m · 20

First attributed message: 2026-07-14
Last attributed message: 2026-09-08 20:42 UTC

Observed FT8 message patterns

Attributed sample: 147 messages
Active dates: 13 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 55, strong (≥ -8 dB) 64.

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 ON5AJ in decoded directed-looking exchanges:

9A3AUH · Croatia ×2 ON7GB · Belgium ×2 DK7ZT · Fed. Rep. of Germany ×2 UA6YW · European Russia 4O4DB · Montenegro A71UN · Qatar E70A · Bosnia-Herzegovina EA1JG · Spain EA8UP · Canary Islands JN1ILK · Japan SV1EAG · Greece TA6MMI · Asiatic Turkey

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 ON5AJ

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: JO11 · 100 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,331 km (approx.)
Last such locator decoded: 2026-09-08 20:42 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	ON5AJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-09 09:42	40m	- / -	9A4ZM	0 / -	2	Partial capture
09-08 20:41	40m	-9 / -	LZ3CB	- / -	2	Partial capture
09-08 20:39	40m	-8 / -10	SY1BKQ	+6 / -	3	✓ Closing observed
09-08 20:25	60m	- / -20	ON7GB	+2 / -	4	✓ Closing fragment
09-08 20:25	60m	- / -10	DL5DQZ	-5 / -	7	✓ Closing fragment
09-08 19:24	40m	-12 / -13	SY1BKQ	+6 / -	7	Partial capture
09-08 19:23	40m	- / -2	OE3UKW	+4 / -	2	✓ Closing fragment
09-07 20:32	40m	- / -	UR4QWW	-4 / -	6	Partial capture
09-06 20:26	40m	-16 / +3	IU3WOH	0 / -	3	Partial capture
09-06 20:25	40m	-8 / -9	IZ5IIN	-6 / -9	5	✓ Full exchange observed
08-31 21:10	60m	-19 / -	OT4R	-11 / -10	3	✓ Closing observed
08-31 21:07	60m	-13 / -11	HA7TM	+10 / +5	5	✓ Full exchange observed
08-31 21:06	60m	-11 / -14	EA1MX	-14 / -	3	✓ Closing observed
08-31 21:04	40m	-12 / -5	9A3AUH	+6 / -16	4	✓ Full exchange observed
08-31 21:03	40m	- / -15	RX3ASQ	-15 / -	2	Partial capture
08-29 08:44	20m	- / -11	<...>	-14 / -	3	Partial capture
08-29 07:09	20m	-20 / -	VK2AAI	- / -	2	Partial capture
08-29 06:45	20m	- / -1	Z62NS	-2 / -	2	✓ Closing fragment
08-28 21:33	80m	- / -12	DK7ZT	+6 / -	6	✓ Closing fragment
08-28 21:33	80m	- / -8	G8BCG	0 / -	2	✓ Closing fragment
08-28 21:31	80m	- / -21	CT3MD	-8 / -	2	✓ Closing fragment
08-25 19:00	20m	+1 / -	CN8NS	- / -	2	Partial capture
08-25 18:51	20m	0 / -	JH5AVM	- / -	4	Partial capture
08-24 21:20	20m	- / -1	EA8UP	+10 / -	2	✓ Closing fragment
08-24 21:15	20m	-16 / -21	D2IM	+3 / -2	5	Partial capture
08-23 21:06	80m	- / -13	G8OO	-4 / -	9	Partial capture
08-23 21:03	80m	-19 / -9	DJ3HW	+4 / -5	5	✓ Full exchange observed
08-23 21:01	80m	- / 0	EI4JFB	-2 / -	2	✓ Closing fragment
08-23 20:18	60m	- / -	DL5DQZ	+2 / -	2	Partial capture
08-23 20:18	60m	- / -6	G4FHL	-15 / -	2	Partial capture
08-21 13:31	10m	-12 / -	SP4MPH	- / -11	2	Partial capture
08-21 13:26	10m	-16 / -	YO4GIY	- / -12	2	Partial capture
08-21 13:24	10m	- / -19	UA6YW	-10 / -	3	✓ Closing fragment
08-21 13:23	10m	-17 / -	9A3AUH	- / -	2	✓ Closing fragment
08-21 13:12	10m	-12 / -	ON7GB	-10 / -	3	✓ Closing observed
08-21 13:11	10m	-11 / -	YC2OEI	- / -	3	Partial capture
08-21 13:05	10m	-19 / -	YC2OEI	- / -	2	Partial capture
08-21 12:54	10m	-17 / -	YC2OEI	- / -	3	Partial capture
08-21 12:51	10m	-12 / -	LZ2CC	- / -	2	Partial capture
08-20 13:19	20m	- / -15	UT7UJ	-9 / -	3	✓ Closing fragment
07-30 21:34	20m	-8 / -	VK4ZPU	- / -	4	Partial capture
07-30 21:22	20m	-8 / -	DS5USH	- / -	5	Partial capture
07-30 21:19	20m	-4 / -	A71UN	-16 / -12	4	✓ Closing observed
07-27 21:21	20m	-3 / -	<...>	- / -	6	Partial capture
07-27 21:19	20m	+2 / -	VE2OPR	- / -	2	Partial capture
07-27 21:18	20m	+2 / -	UN7LEW	- / -11	2	✓ Closing fragment
07-26 20:17	10m	- / -10	PY9AA	-8 / -	2	Partial capture
07-26 19:37	60m	- / -	IK4CBO	-8 / -	4	Partial capture
07-26 19:34	60m	- / +1	PA4CC	+8 / -	5	Partial capture
07-26 18:32	20m	- / -2	4O4DB	-13 / -	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
192330  +3  595  ON5AJ OE3UKW RR73
192415 -14 2980  SY1BKQ ON5AJ JO11
192430  +8 2980  ON5AJ SY1BKQ -13
192445 -10 2980  SY1BKQ ON5AJ JO11
192500  +4 2980  ON5AJ SY1BKQ -13 (x6)
204015  -8 2980  SY1BKQ ON5AJ 73
204100 -12  525  LZ3CB ON5AJ JO11 (x2)
094200  -4  915  ON5AJ 9A4ZM JN86 (x2)

60m

UTC    dB Audio  Message
211030 -21 1900  OT4R ON5AJ R-10
211045 -11 1470  ON5AJ OT4R RR73
211100 -17 1900  OT4R ON5AJ 73
211115  +3 1900  ON5AJ SP5MXZ -12
202515  -9 1912  ON5AJ DL5DQZ JO61
202545  +4 2288  ON5AJ ON7GB JO21
202545  -5 1912  ON5AJ DL5DQZ JO61
202615  +1 2288  ON5AJ ON7GB JO21
202615  -6 2139  ON5AJ DL5DQZ JO61
202645  +4 2288  ON5AJ ON7GB R-20
202645  -4 2138  ON5AJ DL5DQZ JO61
202715  +0 2289  ON5AJ ON7GB 73
202715  -5 2139  ON5AJ DL5DQZ JO61 (x3)

20m

UTC    dB Audio  Message
185200  +0  881  JH5AVM ON5AJ JO11 (x3)
190045  +1  534  CN8NS ON5AJ JO11 (x2)
190500  -2  534  ON5AJ CN8NS -18
064530  -3  730  ON5AJ Z62NS -01 (x2)
064815  -7 2931  EA7R ON5AJ R-08
070945 -19 1820  VK2AAI ON5AJ JO11 (x2)
073330 -24 1714  VK4FFF ON5AJ JO11
084430 -16 1616  ON5AJ <...> -11 (x3)

80m

UTC    dB Audio  Message
210815  -4  672  ON5AJ G8OO JO02 (x5)
213145  -6 1106  ON5AJ CT3MD -21 (x2)
213315  +0 2443  ON5AJ G8BCG -08
213315  +7 1714  ON5AJ DK7ZT -12
213345  +0 2443  ON5AJ G8BCG RR73
213345  +7 1714  ON5AJ DK7ZT -12 (x5)

10m

UTC    dB Audio  Message
131230 -10  684  ON5AJ ON7GB JO21
131245 -10  701  YC2OEI ON5AJ JO11 (x2)
131415 -12  701  ON7GB ON5AJ RR73
131430  -9  684  ON5AJ ON7GB 73
131615 -20 1900  YC2OEI ON5AJ JO11
132330 -18 1154  9A3AUH ON5AJ JO11 (x2)
132445 -12 1154  ON5AJ UA6YW -19 (x3)
132630 -17 1154  YO4GIY ON5AJ JO11 (x2)
133145 -12  714  SP4MPH ON5AJ JO11 (x2)

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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