S57ZS — 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: Slovenia Most frequent locator attributed to this token: JN65

Receiver-side FT8 activity involving S57ZS, decoded by SO8OO in southeastern Poland. 53 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-21.

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 53 FT8 messages attributed to S57ZS as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (66%), followed by 40 m (30%) and 20 m (2%). Several six-hour UTC windows tied for the largest share (87%), 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

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

60m · 35 40m · 16 20m · 1 10m · 1

First attributed message: 2026-06-08
Last attributed message: 2026-10-21 14:46 UTC

Observed FT8 message patterns

Attributed sample: 53 messages
Active dates: 9 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 23.

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 S57ZS in decoded directed-looking exchanges:

PP5BP · Brazil 9A4ZM · Croatia RA0SMS · Asiatic Russia EA5IT · Spain F5RAV · France G0AZH · England KC3YOI · United States ON7GB · Belgium VE3EY · Canada ZL4OL · New Zealand

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 S57ZS

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: JN65 · 32 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 821 km (approx.)
Last such locator decoded: 2026-10-21 14:46 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	S57ZS S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 14:40	40m	-5 / -	RA0SMS	- / -19	4	✓ Closing fragment
10-11 05:39	40m	- / -	F4BYA	+2 / -	3	Partial capture
08-16 04:56	60m	-18 / -	KZ8C	- / -	4	Partial capture
08-14 04:11	60m	-10 / -	KB2KBC	- / -7	6	Partial capture
08-14 04:08	60m	-12 / -	N2CG	- / -	6	Partial capture
08-14 04:03	60m	- / -15	G0AZH	-6 / -	2	✓ Closing fragment
08-14 03:54	60m	-10 / -	KC3YOI	- / -12	4	✓ Closing fragment
08-14 03:51	60m	- / -	SP5EXA	-15 / -	4	Partial capture
08-09 04:50	40m	-10 / -	9A4ZM	-10 / -3	4	✓ Closing observed
08-09 04:42	60m	0 / -	ZL4OL	- / -21	4	✓ Closing fragment
08-09 04:37	60m	- / -24	DK5WL	-9 / -	5	Partial capture
08-09 04:37	60m	-4 / -	ON7GB	-7 / +3	8	✓ Closing observed
08-09 04:37	60m	+6 / -	EA5IT	- / -16	2	✓ Closing fragment
08-09 04:35	60m	0 / +3	F5RAV	-14 / -1	4	✓ Full exchange observed
08-02 02:58	40m	- / -	F1IQH	-9 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
111845 -15 1035  S57ZS PP5BP RR73

40m

UTC    dB Audio  Message
053830  -9 1537  CQ DX S57ZS JN65 (x2)
053915  +6 2935  S57ZS F4BYA JN19
053930 -16 1537  CQ DX S57ZS JN65 (x2)
054015  +0 2934  S57ZS F4BYA JN19 (x2)
054200 -18 1537  CQ DX S57ZS JN65
144000 -10 1537  RA0SMS S57ZS JN65 (x4)
144215  -1 1340  S57ZS HA0GZ KN07
144615  -8 1537  RA8AF S57ZS JN65
144645  -4 1537  EX7CQ S57ZS JN65

60m

UTC    dB Audio  Message
041015  -9 1531  N2CG S57ZS JN65 (x3)
041145 -14 1531  KB2KBC S57ZS -07 (x6)
041445 -14 1532  CQ DX S57ZS JN65
045600 -15 1531  KZ8C S57ZS JN65 (x4)
051230  -6 1531  CQ DX S57ZS JN65

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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