ON4AST — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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

Receiver-side FT8 activity involving ON4AST, decoded by SO8OO in southeastern Poland. 37 FT8 messages attributed to this token as transmitter, on 40m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-06.

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 37 FT8 messages attributed to ON4AST as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Most decodes (81%) fell within the six-hour window 07:00-13:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (68%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

40m · 37

First attributed message: 2026-06-06
Last attributed message: 2026-11-06 08:39 UTC

Observed FT8 message patterns

Attributed sample: 37 messages
Active dates: 9 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -23 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 1.

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 ON4AST in decoded directed-looking exchanges:

G3AKA · England GM5CAR · Scotland HB9ITZ · Switzerland IZ2SXZ · Italy ON6LEO · Belgium PD0TDK · Netherlands PE1BTV/P · Netherlands S55OO · Slovenia SP1EG · Poland

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 ON4AST

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 · 11 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-11-06 08:39 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	ON4AST S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 08:38	40m	-12 / -	TI4LAS	- / -	2	Partial capture
11-06 08:32	40m	- / -5	SP1EG	-18 / -	3	✓ Closing fragment
11-06 08:30	40m	-10 / -	ON6LEO	+2 / -	4	✓ Full exchange observed
11-05 09:00	40m	-15 / -	YL3ATJ	-14 / -23	7	Partial capture
11-05 08:58	40m	-12 / -	G3AKA	- / +7	2	✓ Closing fragment
11-05 08:58	40m	- / -7	OK1HEH	-14 / -	2	Partial capture
11-05 08:56	40m	-14 / -	GM5CAR	- / -16	2	✓ Closing fragment
11-05 08:56	40m	- / -	SP5EXA	+10 / -	5	Partial capture
11-04 10:48	40m	-22 / -	PA7ZZ	-8 / -	3	Partial capture
11-03 10:48	40m	-20 / +2	S55OO	-9 / +5	5	✓ Full exchange observed
11-03 10:47	40m	-22 / -	PD0TDK	- / -2	2	✓ Closing fragment
11-03 10:47	40m	- / -	F4BYA	-4 / -	2	Partial capture
11-03 10:46	40m	-21 / -	IZ2SXZ	-18 / -	2	✓ Closing observed
08-25 14:31	40m	-16 / -	HB9ITZ	- / -20	2	✓ Closing fragment
08-25 14:29	40m	-18 / -	PE1BTV/P	- / -4	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
090045 -18 1769  YL3ATJ ON4AST -23
090130 -16 1770  ON4AST YL3ATJ KO27
090145 -11 1769  YL3ATJ ON4AST -20 (x4)
083045 -11  665  ON6LEO ON4AST JO21
083100  +2  665  ON4AST ON6LEO +32
083115  -8  665  ON6LEO ON4AST R+17
083130  +1  665  ON4AST ON6LEO RR73
083200 -21 1637  ON4AST SP1EG JO73 (x3)
083800 -12  914  TI4LAS ON4AST JO21 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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