ON4SS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving ON4SS, decoded by SO8OO in southeastern Poland. 134 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-19.

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 134 FT8 messages attributed to ON4SS 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 (84%), followed by 20 m (15%) and 10 m (1%). Most decodes (98%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (94%); the estimated median was -1 dB.

Overview

134

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

40m · 113 20m · 20 10m · 1

First attributed message: 2026-06-13
Last attributed message: 2026-09-19 22:20 UTC

Observed FT8 message patterns

Attributed sample: 134 messages
Active dates: 7 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -7 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 126.

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 ON4SS in decoded directed-looking exchanges:

UX7QV · Ukraine ×2 R50RKZ · European Russia EA1IOK · Spain F5NNN · France HA7TM · Hungary M7WFZ · England RA6OY · European Russia RY7G · European Russia SP6FME · Poland AJ4OA · United States DB0CUI · Fed. Rep. of Germany DK0ACI · Fed. Rep. of Germany

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 ON4SS

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: JO21 · 62 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-19 22:18 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	ON4SS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 22:19	40m	+10 / -	IK0CHU	+8 / -3	6	✓ Full exchange observed
09-19 22:18	40m	+10 / -	RN3YN	- / -12	4	✓ Closing fragment
08-28 22:16	40m	+1 / -3	F5OYA/P	-10 / -3	5	✓ Full exchange observed
08-28 22:13	40m	+2 / +2	DB0CUI	-6 / -4	6	✓ Full exchange observed
08-28 22:11	40m	+1 / -	JY5IB	- / -11	3	✓ Closing fragment
08-28 22:10	40m	+1 / -	AJ4OA	- / -13	2	✓ Closing fragment
08-28 22:08	40m	+2 / -	M7GOA	- / -11	2	✓ Closing fragment
08-28 22:05	40m	-2 / -	UX7QV	-20 / 0	4	✓ Closing observed
08-28 21:59	40m	-2 / +3	DL5DQZ	+13 / -2	5	✓ Full exchange observed
08-28 21:58	40m	-2 / -15	R1AV	-12 / -13	4	✓ Full exchange observed
08-28 21:56	40m	0 / -9	IZ5IOM	-11 / -7	5	✓ Full exchange observed
08-28 21:51	40m	-2 / -	IU2VUZ	- / -17	2	✓ Closing fragment
08-28 21:50	40m	-3 / -	EB2EMZ	-19 / -5	9	✓ Full exchange observed
08-28 21:47	40m	-6 / -	DL1EDR	0 / +1	5	✓ Full exchange observed
08-28 21:44	40m	- / +5	G0RVY	+7 / -	3	✓ Closing fragment
08-28 21:43	40m	+1 / -	UX7QV	- / -5	3	✓ Closing fragment
08-28 21:42	40m	0 / -6	UA9CR	+1 / -4	4	✓ Full exchange observed
08-28 21:41	40m	0 / -	SP7TF	- / -4	2	✓ Closing fragment
08-28 21:37	40m	+5 / -	F6BHK	0 / -4	9	✓ Closing observed
08-28 21:34	40m	+4 / +2	OM3PR	-14 / -15	4	✓ Full exchange observed
08-28 21:33	40m	-2 / +1	DK0ACI	0 / 0	4	✓ Full exchange observed
08-28 21:31	40m	+2 / 0	R6OU	+6 / -5	4	✓ Full exchange observed
08-28 21:31	40m	+4 / -	SP7TF	- / -7	2	Partial capture
08-28 21:29	40m	-4 / -5	PD0LBY	0 / -11	6	✓ Full exchange observed
08-28 21:26	40m	+3 / -	UN7PPV	- / -15	3	✓ Closing fragment
08-28 21:25	40m	+4 / -6	DL9KM	+4 / -3	5	✓ Full exchange observed
08-28 21:23	40m	+2 / +2	PC2J	+10 / -	3	✓ Closing observed
08-21 23:34	20m	-2 / -	HH2JR	- / -	2	Partial capture
08-21 23:30	20m	-4 / -	HH2JR	- / -	3	Partial capture
08-21 23:20	20m	-8 / -	HH2JR	- / -	6	Partial capture
08-21 23:09	20m	-1 / -	HH2JR	- / -	5	Partial capture
08-21 20:45	40m	-4 / +5	DK7ZT	-8 / -	3	✓ Closing observed
08-21 20:44	40m	-5 / -	SP7TF	- / -8	2	Partial capture
08-09 15:26	20m	- / -2	HA7TM	-12 / -	2	✓ Closing fragment
08-04 14:48	10m	- / -19	R50RKZ	-4 / -	2	✓ Closing fragment
07-16 21:44	20m	- / -10	M9UUU	-13 / -	2	Partial capture
07-16 21:39	20m	- / -	F5NNN	-12 / -	2	✓ Closing fragment
07-16 21:19	20m	- / -12	M7WFZ	-22 / -	2	✓ Closing fragment
07-16 18:52	20m	- / -	RY7G	-11 / -	3	✓ Closing fragment
07-11 23:39	20m	- / -17	EA1IOK	-6 / -	3	✓ Closing fragment
07-11 23:17	20m	- / 0	RA6OY	-5 / -	4	✓ Closing fragment
07-11 23:14	20m	- / -5	W6NWS	-20 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
221700  +0 1976  F5OYA/P ON4SS -03
221715 -11 1976  ON4SS F5OYA/P R-03
221730  +2 1976  F5OYA/P ON4SS RR73
221745 -11 1976  ON4SS F5OYA/P 73
221745 +10 2278  CQ ON4SS JO21
221815  +8 2279  RN3YN ON4SS JO21 (x3)
221930  +9 1329  ON4SS IK0CHU JN62
221945 +12 2279  RN3YN ON4SS 73
222000  +8 1329  ON4SS IK0CHU JN62
222015 +10 2279  IK0CHU ON4SS -03
222030  +7 1329  ON4SS IK0CHU R+13
222045 +11 2279  IK0CHU ON4SS RR73
222100 +10 1329  ON4SS IK0CHU 73

20m

UTC    dB Audio  Message
231045  -3 1726  HH2JR ON4SS JO21 (x15)

10m

UTC    dB Audio  Message
203545 -19 2232  PY5TD ON4SS -14
144800  -6  803  ON4SS R50RKZ -19 (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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