SP0ZKR — 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: Poland Most frequent locator attributed to this token: JO81

Receiver-side FT8 activity involving SP0ZKR, decoded by SO8OO in southeastern Poland. 652 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-01.

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 652 FT8 messages attributed to SP0ZKR as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (43%), followed by 80 m (39%) and 20 m (17%). Most decodes (81%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (95%); the estimated median was +5 dB.

Overview

652

Messages attributed

UTC dates decoded

Active 15-min windows

+5 dB

Estimated median S/N

Bands

80m · 257 40m · 283 20m · 112

First attributed message: 2026-06-07
Last attributed message: 2026-09-01 20:50 UTC

Observed FT8 message patterns

Attributed sample: 652 messages
Active dates: 18 UTC dates
Estimated median S/N: +5 dB
Estimated 10th-90th percentile: -5 to +12.4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 30, strong (≥ -8 dB) 618.

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 SP0ZKR in decoded directed-looking exchanges:

JF4VZT · Japan ×2 4X1UF · Israel 9A3AUH · Croatia EA3KE · Spain HB9TLL · Switzerland IN3WZS · Italy IQ4JO · Italy IU4DTV · Italy IZ2JTL · Italy IZ4EKI · Italy JA0RUG · Japan KP4VET · Puerto Rico

Most frequent locator attributed to SP0ZKR

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: JO81 · 360 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 379 km (approx.)
Last such locator decoded: 2026-09-01 20:46 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	SP0ZKR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-27 21:25	40m	- / -	EA3KE	+4 / -	3	✓ Closing fragment
10-26 21:41	40m	- / -11	KP4VET	-14 / -	2	✓ Closing fragment
10-25 21:45	40m	- / -2	4X1UF	-12 / -	3	✓ Closing fragment
10-25 21:34	40m	- / -3	RX9WM	-2 / -	3	✓ Closing fragment
10-25 21:07	40m	- / -11	9A5ZD	-20 / -	3	Partial capture
10-25 20:59	40m	- / -4	IZ4EKI	-19 / -	3	✓ Closing fragment
10-25 20:52	40m	- / -	HB9DDZ	-12 / -	2	Partial capture
10-25 20:50	40m	- / -	IZ2JTL	-10 / -	3	✓ Closing fragment
10-25 20:46	40m	- / -3	9A3AUH	-3 / -	3	✓ Closing fragment
10-25 20:37	40m	- / -4	IU4DTV	+3 / -	2	✓ Closing fragment
10-25 20:31	40m	- / -7	IQ4JO	-18 / -	3	✓ Closing fragment
10-25 20:10	40m	- / -12	IN3WZS	-11 / -	3	✓ Closing fragment
09-01 20:49	40m	-4 / -13	JF4VZT	-4 / -11	4	✓ Full exchange observed
09-01 20:47	40m	+6 / -	JA4GCL	- / -20	2	Partial capture
09-01 20:45	40m	+3 / -10	JA0RUG	-10 / -22	6	✓ Full exchange observed
08-31 20:18	40m	+6 / -	TC30AGU	- / -	2	Partial capture
08-31 20:15	40m	-6 / +1	OE6GBG	+12 / +1	5	✓ Full exchange observed
08-31 20:14	40m	- / -6	GB64MOD	+5 / -	2	Partial capture
08-31 20:12	40m	-1 / +2	HB10GBT	-5 / -1	4	Partial capture
08-31 20:09	40m	+1 / -8	HB9TLL	-4 / -6	10	✓ Full exchange observed
08-31 20:05	40m	0 / 0	SQ9SET	-13 / -7	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
210745 -19 1295  SP0ZKR 9A5ZD JN75 (x3)
211645  -1  506  SP0ZKR 4Z4DX KM72
213445  -2  525  SP0ZKR RX9WM LO74 (x3)
214530 -15  229  SP0ZKR 4X1UF -02 (x3)
214145 -13 1312  SP0ZKR KP4VET R-11 (x2)
212500  -4  585  SP0ZKR EA3KE JN00 (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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