ON5MA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO10

Receiver-side FT8 activity involving ON5MA, decoded by SO8OO in southeastern Poland. 79 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-09-11.

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 79 FT8 messages attributed to ON5MA 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 (86%), followed by 80 m (9%) and 20 m (5%). Several six-hour UTC windows tied for the largest share (70%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (73%); the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 7 40m · 68 20m · 4

First attributed message: 2026-06-18
Last attributed message: 2026-09-11 06:53 UTC

Observed FT8 message patterns

Attributed sample: 79 messages
Active dates: 7 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -17 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 58, strong (≥ -8 dB) 12.

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 ON5MA in decoded directed-looking exchanges:

DC9GT · Fed. Rep. of Germany DL3MIB · Fed. Rep. of Germany F5RRS · France GJ0KYZ · Jersey HG8LXL · Hungary KG6PH · United States KT4ZG · United States OE7LVI · Austria PV8AJ · Brazil SP6FME · Poland UT3UQJ · 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 ON5MA

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: JO10 · 52 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,335 km (approx.)
Last such locator decoded: 2026-09-11 06:53 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	ON5MA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 06:50	40m	-12 / -	F1LPT	- / -	2	Partial capture
09-11 06:34	40m	-11 / -	UA9JTJ/4	- / -	7	Partial capture
09-11 06:11	40m	-11 / -	UA9JTJ/4	- / -	12	Partial capture
09-11 06:08	40m	-10 / -3	GJ0KYZ	-15 / -6	5	✓ Full exchange observed
09-11 06:08	40m	-10 / -9	HG8LXL	-7 / -6	6	✓ Full exchange observed
09-11 06:06	40m	-10 / -	EA3HMM	- / -13	2	Partial capture
09-11 06:06	40m	-10 / -12	DL3MIB	+6 / -4	7	✓ Full exchange observed
09-11 06:05	40m	-11 / -	KT4ZG	- / -12	2	✓ Closing fragment
09-11 06:03	40m	-12 / -1	F5RRS	+5 / 0	6	✓ Full exchange observed
09-11 06:01	40m	-12 / -	KG6PH	- / -21	4	✓ Closing fragment
09-11 05:59	40m	-10 / -	ON4STA	- / -	2	Partial capture
09-11 05:57	40m	-11 / -	PV8AJ	- / -10	3	✓ Closing fragment
09-11 05:43	40m	-17 / -	UA9JTJ/4	- / -	3	Partial capture
09-11 05:40	40m	-17 / -	SV8/F6BLP	- / -	2	Partial capture
09-01 21:10	80m	-18 / -19	9A3TGY	+4 / -	21	Partial capture
08-29 19:41	40m	-10 / -	OH3DJP	- / -	8	Partial capture
08-29 19:37	40m	-4 / -11	OE7LVI	-2 / -	4	✓ Closing observed
08-29 19:32	40m	-6 / -	UT3UQJ	- / -13	2	✓ Closing fragment
08-29 19:30	40m	0 / -	SP6FME	- / +1	2	✓ Closing fragment
08-26 21:12	80m	-10 / -	RI1FJL	- / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
061945  -9 1435  UA9JTJ/4 ON5MA JO10 (x7)
063915  -8 1434  UB3BDJ/6 ON5MA JO10
063945 -11 1435  UA9JTJ/4 ON5MA JO10
064845 -11 1435  OA4ENG ON5MA JO10
065045 -10 1435  F1LPT ON5MA JO10
065100 -20 1911  ON5MA F1LPT/P -10
065115 -15 1435  F1LPT ON5MA JO10 (x2)
065500 -22 1909  ON5MA F1LPT/P -09

80m

UTC    dB Audio  Message
211245 -19 1927  9A3TGY ON5MA JO10
211300  +1 2843  ON5MA 9A3TGY -19
211315 -17 1927  9A3TGY ON5MA JO10
211330  +8 2842  ON5MA 9A3TGY -19 (x12)

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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