SM4TYA — 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: Sweden Most frequent locator attributed to this token: JP71

Receiver-side FT8 activity involving SM4TYA, decoded by SO8OO in southeastern Poland. 91 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-10-14.

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 91 FT8 messages attributed to SM4TYA as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (86%), followed by 40 m (7%) and 20 m (7%). Most decodes (76%) fell within the six-hour window 00:00-06:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 1 60m · 78 40m · 6 20m · 6

First attributed message: 2026-06-20
Last attributed message: 2026-10-14 05:23 UTC

Observed FT8 message patterns

Attributed sample: 91 messages
Active dates: 10 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 34, strong (≥ -8 dB) 45.

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 SM4TYA in decoded directed-looking exchanges:

D44TWO · Cape Verde DH3YAK · Fed. Rep. of Germany G0BLB · England G8OO · England S56MLZ · Slovenia SP9DWT · Poland SP9UPH · 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 SM4TYA

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: JP71 · 70 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,352 km (approx.)
Last such locator decoded: 2026-10-14 05:17 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	SM4TYA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-14 05:22	60m	-19 / -15	G0BLB	+6 / -	4	✓ Closing observed
10-14 05:20	60m	-24 / -1	DH3YAK	-4 / +4	5	✓ Full exchange observed
10-14 05:17	60m	-21 / -17	S56MLZ	-2 / -13	6	✓ Full exchange observed
10-09 20:49	60m	-8 / -	9T0MD	- / -	14	Partial capture
10-04 07:45	60m	- / +5	SP9DWT	-7 / -	3	✓ Closing fragment
10-04 03:42	60m	-7 / -	9T0MD	- / -	18	Partial capture
10-04 00:51	60m	-7 / -	9T0MD	- / -	26	Partial capture
10-03 04:30	60m	-15 / -	9T0MD	- / -	3	Partial capture
09-03 03:53	40m	-9 / -	TL8GD	- / -19	5	Partial capture
09-01 04:28	60m	-10 / -6	SP9UPH	-1 / -3	5	✓ Full exchange observed
09-01 04:26	60m	-10 / -12	G8OO	-1 / -6	7	✓ Full exchange observed
09-01 04:26	60m	- / -	PC2F	-18 / -	3	Partial capture
09-01 04:23	60m	-5 / -	D44TWO	- / -15	7	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
051745 -20 1884  S56MLZ SM4TYA JP71
051830  -2  569  SM4TYA S56MLZ -17
051845 -21 1884  S56MLZ SM4TYA R-13 (x2)
051930  -2  569  SM4TYA S56MLZ RR73
051945 -22 1884  S56MLZ SM4TYA 73
052000  +0 1287  SM4TYA DH3YAK JO31 (x2)
052045 -24 1884  DH3YAK SM4TYA +04
052100  -5 1286  SM4TYA DH3YAK R-01 (x2)
052200  +8  514  SM4TYA G0BLB IO81 (x2)
052315 -19 1884  G0BLB SM4TYA RR73
052330  +8  514  SM4TYA G0BLB 73

40m

UTC    dB Audio  Message
225645 -21 2059  TN8GD SM4TYA JP71
035315 -11  469  TL8GD SM4TYA R-19 (x5)

80m

UTC    dB Audio  Message
211315 -24 1644  RI1FJL SM4TYA JP71

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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