SN4K — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO03

Receiver-side FT8 activity involving SN4K, decoded by SO8OO in southeastern Poland. 1,872 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 58 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-11.

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 1,872 FT8 messages attributed to SN4K as the transmitting token by decoded message structure across 58 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (37%) and 20 m (8%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -2 dB.

Overview

1,872

Messages attributed

UTC dates decoded

240

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 90 80m · 701 40m · 917 20m · 145 10m · 19

First attributed message: 2026-06-06
Last attributed message: 2026-09-11 22:09 UTC

Observed FT8 message patterns

Attributed sample: 1,872 messages
Active dates: 58 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -15 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 176, moderate (-15 to -9 dB) 371, strong (≥ -8 dB) 1,325.

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 SN4K in decoded directed-looking exchanges:

G0RVY · England ×7 IK4LZH · Italy ×5 UT6HN · Ukraine ×3 DL3IKE · Fed. Rep. of Germany ×2 PD1AQL · Netherlands ×2 SP5DFK · Poland ×2 F4FTV · France ×2 SP8ONV · Poland ×2 DG6VC · Fed. Rep. of Germany ×2 ON4VMA · Belgium ×2 LZ6C · Bulgaria ×2 S57AM · Slovenia ×2

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 SN4K

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: KO03 · 975 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 400 km (approx.)
Last such locator decoded: 2026-09-11 22:04 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	SN4K S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 22:08	80m	+3 / 0	IU2VUZ	-21 / -20	4	Partial capture
09-11 22:06	80m	+4 / 0	IV3JRY	+15 / -	7	✓ Full exchange observed
09-11 22:05	80m	+2 / +9	DL4SCW	-13 / -9	7	✓ Full exchange observed
09-11 22:05	80m	+11 / -6	TF3VS	-12 / -7	5	✓ Full exchange observed
09-11 22:00	80m	+14 / 0	DL6UXL	-8 / -1	4	✓ Full exchange observed
09-11 21:57	80m	+14 / -	RA0AF	- / -	2	Partial capture
09-11 21:54	80m	-4 / -14	G0KAD	-15 / -15	5	✓ Full exchange observed
09-11 21:53	80m	- / -	OM1AGE	+4 / -	6	Partial capture
09-11 21:52	80m	-2 / -6	UB3ADO/P	-8 / -5	5	✓ Full exchange observed
09-11 21:51	80m	-3 / -	R9FDL	- / -	2	Partial capture
09-11 21:49	80m	- / -14	F4AGZ	-16 / -	2	✓ Closing fragment
09-11 21:47	80m	+8 / -	TF3VS	- / -	2	Partial capture
09-09 22:21	40m	- / -	G0CMQ	-7 / -	4	Partial capture
09-09 22:10	40m	- / +6	M8FQT	-8 / -	2	✓ Closing fragment
09-09 19:09	40m	-6 / -	EW6DM/P	- / -	2	Partial capture
09-09 19:05	40m	-4 / -	3Z100PKP	- / -17	7	Partial capture
09-09 18:55	40m	-4 / -	E70SZ	- / -	2	Partial capture
09-09 18:53	40m	+1 / -3	YO2MTG	-8 / -5	5	✓ Full exchange observed
09-09 18:49	40m	-5 / -	OK2BXD/P	- / -16	2	Partial capture
09-09 18:48	40m	-5 / -2	SP3GHC	-12 / -	2	✓ Closing observed
09-09 18:46	40m	+3 / +7	SN100PKP	-7 / -	8	Partial capture
09-09 18:43	40m	-7 / -	IZ0ZIP	- / -	3	Partial capture
09-09 18:39	40m	-1 / -5	R9FFJ	-17 / -	2	Partial capture
09-09 18:36	40m	+3 / +8	PA3AGN	-3 / -3	5	✓ Full exchange observed
09-09 18:34	40m	+2 / -	RG3R	+3 / -10	4	✓ Closing observed
09-09 18:32	40m	-2 / -10	R1WAB	-11 / -4	4	✓ Full exchange observed
09-09 09:32	40m	-16 / -2	SQ2JDM	-10 / -12	5	✓ Full exchange observed
09-09 09:28	40m	-9 / -	DL1RMY	- / -17	5	Partial capture
09-09 09:27	40m	-12 / -	DL7DL	-4 / -	4	✓ Closing observed
09-09 09:23	40m	0 / +10	HG0NPJ	-8 / -	9	Partial capture
09-09 09:22	40m	0 / +4	DL1RMY	-15 / -	3	Partial capture
09-08 21:13	80m	+10 / -	G1NZO	- / -3	3	✓ Closing fragment
09-08 21:12	80m	+12 / -	F4FTV	- / -	2	Partial capture
09-08 21:08	80m	+8 / -	LA2DMA	- / -15	3	✓ Closing fragment
09-08 20:51	80m	+14 / -18	PH1RIS	-12 / -18	6	✓ Full exchange observed
09-08 20:45	80m	+14 / -9	RC9WC	-4 / -2	6	✓ Full exchange observed
09-08 20:45	80m	+14 / +10	SP2GR	-8 / -5	5	✓ Full exchange observed
09-08 20:43	80m	+13 / -	OZ/KD0NDU	- / -1	3	Partial capture
09-08 19:38	40m	- / +7	R3YAU	+5 / -	2	✓ Closing fragment
09-08 19:35	40m	- / -16	R4FBT	-11 / -	3	Partial capture
09-08 19:27	40m	- / -1	GM6ZC	-17 / -	2	✓ Closing fragment
09-08 19:21	40m	- / -	PD2MAC	-5 / -	14	Partial capture
09-08 19:20	40m	-4 / +3	G6MTI	-7 / -	8	Partial capture
09-07 21:34	80m	+7 / -	IW2CNR	- / -	3	Partial capture
09-07 21:33	80m	+3 / -	DG5PW	- / -	2	Partial capture
09-07 21:31	80m	+7 / -15	OV6ZM	-6 / +6	5	✓ Full exchange observed
09-07 21:28	80m	+6 / -8	SV1SSL	-10 / +1	7	✓ Full exchange observed
09-06 21:06	40m	-10 / -13	VP2MAA	-23 / -13	2	Partial capture
09-06 20:57	80m	+15 / -9	G0LZX	-11 / -7	4	✓ Full exchange observed
09-06 20:53	160m	-15 / -	RD1A	- / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
220630 +13  958  SN4K IV3JRY JN66
220645  +2 1103  DL4SCW SN4K -09
220700 +15  958  SN4K IV3JRY JN66
220700  -7 1574  SN4K DL4SCW R+09
220715  +5 1103  DL4SCW SN4K RR73
220730 +16  958  SN4K IV3JRY JN66
220730 -19 1575  SN4K DL4SCW 73
220745  +5 1103  IV3JRY SN4K +24
220800 +14  958  SN4K IV3JRY R+00
220815  +4 1103  IV3JRY SN4K RR73
220830 +15  958  SN4K IV3JRY 73
220845  +1 1103  IU2VUZ SN4K -20
220930 -24 1951  SN4K IU2VUZ R+00
220945  +5 1103  IU2VUZ SN4K -20
221000 -18 1951  SN4K IU2VUZ R-06

40m

UTC    dB Audio  Message
190515  -5 2112  3Z100PKP SN4K KO03 (x7)
190915  -5 1825  EW6DM/P SN4K KO03 (x2)
221000 -10 1199  SN4K M8FQT R+06 (x2)
222100  -8 2590  SN4K G0CMQ IO83 (x4)

160m

UTC    dB Audio  Message
200630 +15 2219  SN4K HA7TM RR73
200645  +1 1821  SN4K OK1TP -10
202215  -7  722  SP2FWC SN4K KO03
202300  -7  722  SN4K SP2FWC -16 (x2)
202830 -12 2032  LA9H SN4K R-20
202915 -20 2032  SN4K LA9H RR73
202930 -16 2032  LA9H SN4K 73
203345 -24 1101  UA1AIR SN4K KO03 (x2)
205330 -17 1678  RD1A SN4K KO03 (x4)
205515  -6 1678  SN4K RD7O KN98

20m

UTC    dB Audio  Message
085300 -21 1534  SN4K 2E0TSS R+11
085530 -10 1451  SN4K PD0WL R-06 (x2)
090230 -13 1579  SN4K PD0GJS -03
090630  -8 1086  SN4K M9LCB +03 (x2)
090945  -8 1196  SN4K PD0ACM JO21 (x5)
131030  +1 1880  SN4K UA3RCW -09 (x2)
131330 -17 1653  SN4K G3ZRN RR73
132315 -19 1668  SN4K M9VMT +00

10m

UTC    dB Audio  Message
102300 -12 1633  SN4K DK1MBY JN58 (x4)
102630 -13  853  SN4K DN9SHA JO31 (x4)
103930 -21 1840  SN4K DO3VS +00 (x2)
104500 -12 1753  SN4K DO5STL JO31
155215  -6 1472  SN4K IU2EBR +00 (x2)
163700 -18 1514  SN4K IU1QZR -15
164030 -14  891  SN4K G0RVY JO01

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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