SP0ZKR — FT8 activity observed at SO8OO

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:

5Z4VJ · Kenya ×2 JF4VZT · Japan ×2 E75W · Bosnia-Herzegovina IK4LZH · Italy IU5TUG · Italy LZ1JZ · Bulgaria CN2DX · Morocco DL1UDO · Fed. Rep. of Germany F1PBZ · France F4HPO · France HC2GRC · Ecuador HK4J · Colombia

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 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
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
07-28 16:20	20m	- / -17	RA9J	-8 / -	4	✓ Closing fragment
07-27 19:54	20m	- / -1	F1IQH	-6 / -	2	Partial capture
07-17 21:51	20m	- / -3	JA4LXY	+5 / -	2	✓ Closing fragment
07-15 07:47	20m	- / -10	RA6OV	-6 / -	2	✓ Closing fragment
07-15 07:34	20m	- / -5	YO3GNF	-4 / -	2	Partial capture
07-15 07:32	20m	- / -	IK4LZH	+6 / -	4	Partial capture
07-13 18:49	20m	- / +2	RY7G	+12 / -	2	✓ Closing fragment
07-13 18:47	20m	- / +6	JA6TXU	-16 / -	2	✓ Closing fragment
07-13 17:43	20m	+10 / -	JH5AVM	- / -	3	Partial capture
07-13 17:26	20m	- / +2	CN2DX	-10 / -	2	✓ Closing fragment
07-13 10:33	10m	- / -	LZ1JZ	-20 / -	2	✓ Closing fragment
07-13 10:18	10m	- / +1	IU5TUG	-6 / -	2	✓ Closing fragment
07-12 20:14	40m	+4 / -	EA8UP	-12 / -	3	✓ Closing observed
07-12 19:48	40m	- / -	SQ3PMX	-5 / -	3	Partial capture
07-12 19:46	40m	-2 / -	SP9EIA	-18 / -7	3	✓ Closing observed
07-12 19:44	40m	+2 / -	PD2TX	- / -	3	✓ Closing fragment
07-12 19:43	40m	+4 / -15	S56KO	-6 / -2	4	✓ Full exchange observed
07-12 19:42	40m	+3 / -2	DF3MT	-9 / -3	4	✓ Full exchange observed
07-12 19:35	40m	0 / -	UA3SCU	- / -14	2	✓ Closing fragment
07-12 09:04	20m	- / -	DL1UDO	-18 / -	3	✓ Closing fragment
07-12 09:02	20m	- / -	DL1FSK	+2 / -	2	Partial capture
07-12 09:02	20m	- / -2	R2AL	-12 / -	4	✓ Closing fragment
07-12 08:45	20m	- / -	IK4LZH	-2 / -	3	Partial capture
07-12 05:35	20m	- / -9	RA9LL	-2 / -	2	✓ Closing fragment
07-12 05:18	20m	- / -6	TI2SD	-12 / -	2	✓ Closing fragment
07-11 21:43	40m	- / -	GM4CXF	-12 / -	2	Partial capture
07-11 21:35	40m	- / +9	9A3DVE	-11 / -	3	Partial capture
07-11 17:08	20m	- / -	PA2KV	-8 / -	2	✓ Closing fragment
07-11 16:48	20m	- / -6	MI7JQH	-9 / -	9	Partial capture
07-11 16:44	20m	- / -	YO5PHL	-4 / -	4	Partial capture
07-11 16:11	20m	- / -	MI7JQH	-12 / -	4	Partial capture
07-11 05:37	20m	- / -8	KE4EB	-13 / -	2	Partial capture
07-11 05:22	20m	- / -	DL3MIB	-6 / -	6	Partial capture
07-11 05:16	20m	- / +6	KV3R	-10 / -	3	✓ Closing fragment
07-10 04:44	20m	- / -	PI4DX	-6 / -	2	✓ Closing fragment
07-09 07:33	20m	0 / -	GU0SUP	- / -	2	Partial capture
07-09 07:26	20m	-2 / -	GU0SUP	- / -	4	Partial capture
07-09 05:17	20m	- / +10	UR4QWW	-13 / -	5	✓ Closing fragment
07-08 05:29	40m	- / -2	DJ2PW	-7 / -	2	Partial capture
07-08 05:27	40m	-9 / -	UR3AHB	-15 / -14	2	✓ Closing observed
07-08 05:23	40m	-11 / -	PH7GD	-24 / -15	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
204145  +4  487  TA2BMV SP0ZKR JO81
204345  +8  405  D2ACE SP0ZKR JO81
204430  +4  404  JA1NVF SP0ZKR JO81
204530  +2  469  JA0RUG SP0ZKR JO81 (x2)
204615 -11  316  SP0ZKR JA0RUG -10
204630  +4  468  JA0RUG SP0ZKR R-22
204645  -9  315  SP0ZKR JA0RUG RR73
204700  +4  468  JA0RUG SP0ZKR 73
204730  +7  468  JA4GCL SP0ZKR -20 (x2)
204915  -5  641  SP0ZKR JF4VZT -13
204930  -4  448  JF4VZT SP0ZKR R-11
204945  -3  641  SP0ZKR JF4VZT RR73
205000  -3  447  JF4VZT SP0ZKR 73

20m

UTC    dB Audio  Message
073345  +5  462  SP0ZKR IK4LZH JN54
073415  -3 2476  SP0ZKR YO3GNF KN34 (x2)
074745  -5  892  SP0ZKR RA6OV R-10 (x2)
215115  +3  381  SP0ZKR JA4LXY -03 (x2)
215445 -11 2176  SP0ZKR YV5WL -11
194315 -24 2132  SP0ZKR JA0LFV -06
195415  -8  560  SP0ZKR F1IQH JN27 (x2)
162045  -9  882  SP0ZKR RA9J -17 (x4)

10m

UTC    dB Audio  Message
144545 -18 2181  SP0ZKR 5Z4VJ RR73
101830  -7 1005  SP0ZKR IU5TUG +01 (x2)
102545 +10  442  SP0ZKR IK4LZH RR73
102900  -9 2545  SP0ZKR E75W RR73
103300 -20 2180  SP0ZKR LZ1JZ +13 (x2)
103715 -14  721  SP0ZKR SV2CLJ +04
103845 -17 1029  SP0ZKR SV7BAY +01
160645  -8  409  SP0ZKR UR4QWW R+00

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.

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