DO1ZK — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO54

Receiver-side FT8 activity involving DO1ZK, decoded by SO8OO in southeastern Poland. 44 FT8 messages attributed to this token as transmitter, on 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-16 and 2026-08-22.

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 44 FT8 messages attributed to DO1ZK as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Most decodes (95%) fell within the six-hour window 09:00-15:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (75%); the estimated median was -18 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

10m · 44

First attributed message: 2026-08-16
Last attributed message: 2026-08-22 09:05 UTC

Observed FT8 message patterns

Attributed sample: 44 messages
Active dates: 3 UTC dates
Estimated median S/N: -18 dB
Estimated 10th-90th percentile: -23 to -12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 33, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 0.

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 DO1ZK in decoded directed-looking exchanges:

F1PBZ · France ×2 9A3CX · Croatia CR7BRV · Portugal CR7BUJ · Portugal DC6MY · Fed. Rep. of Germany DH1GKS · Fed. Rep. of Germany DN9OPA · Fed. Rep. of Germany EA3AKY · Spain F1SZC · France F4FSY · France F5ADE · France IK4LZH · Italy

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 DO1ZK

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: JO54 · 27 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 892 km (approx.)
Last such locator decoded: 2026-08-22 09:05 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	DO1ZK S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-03 12:47	10m	- / -14	CR7BUJ	-14 / -	3	✓ Closing fragment
10-03 12:32	10m	- / -9	CR7BRV	-2 / -	2	✓ Closing fragment
08-28 09:03	10m	- / -	IU4PPL	-17 / -	2	Partial capture
08-27 11:26	10m	- / -10	F1SZC	-18 / -	2	✓ Closing fragment
08-27 10:19	10m	- / -1	EA3AKY	-5 / -	3	✓ Closing fragment
08-22 13:15	10m	- / -17	DH1GKS	-14 / -	3	✓ Closing fragment
08-22 13:04	10m	- / -9	F1PBZ	-8 / -	2	✓ Closing fragment
08-22 12:35	10m	- / -	F5SZY	-9 / -	3	Partial capture
08-21 10:37	10m	- / -17	IK7YZB	-4 / -	2	Partial capture
08-21 07:47	10m	- / -7	II7MGXX	-4 / -	2	Partial capture
08-21 07:31	10m	- / -	UR5VOA	-21 / -	2	Partial capture
08-19 07:52	10m	- / -17	DO1FKM	-14 / -	2	Partial capture
08-18 14:13	10m	-13 / -	SP8BJU	- / -11	2	Partial capture
08-18 13:05	10m	-20 / -	SP2LNY	- / -16	2	Partial capture
08-18 11:55	10m	-12 / -	F5ADE	- / +5	2	✓ Closing fragment
08-18 11:26	10m	-20 / -	UA3ZUX	- / -15	3	✓ Closing fragment
08-18 07:45	10m	- / -9	IU8ADS	-10 / -	3	✓ Closing fragment
08-16 11:21	10m	- / +2	M0BEW	-8 / -	2	✓ Closing fragment
08-16 09:44	10m	- / -	DA6PI	-15 / -	7	Partial capture
08-13 11:41	10m	- / -9	F1PBZ	+2 / -	2	✓ Closing fragment
08-13 10:30	10m	- / -2	9A3CX	-18 / -	2	✓ Closing fragment
08-13 10:30	10m	- / +7	IK4LZH	+12 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
131530 -12 2208  DO1ZK DH1GKS R-17 (x2)
101915  -4 1222  DO1ZK EA3AKY JN01 (x3)
112645 -16 1693  DO1ZK F1SZC -10 (x2)
084515 -16 1010  DO1ZK F4JKY -13
090330 -19 2109  DO1ZK IU4PPL JN54 (x2)
123245  -3  905  DO1ZK CR7BRV -09 (x2)
124700 -15 1233  DO1ZK CR7BUJ -14 (x3)

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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