SP7UB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO91

Receiver-side FT8 activity involving SP7UB, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-08-12 and 2026-09-14.

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 99 FT8 messages attributed to SP7UB as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (53%), followed by 40 m (20%) and 160 m (19%). Several six-hour UTC windows tied for the largest share (75%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (81%); the estimated median was +1 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

160m · 19 80m · 52 40m · 20 20m · 8

First attributed message: 2026-08-12
Last attributed message: 2026-09-14 16:08 UTC

Observed FT8 message patterns

Attributed sample: 99 messages
Active dates: 11 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -12 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 80.

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 SP7UB in decoded directed-looking exchanges:

4X1UF · Israel ×2 LY2BNL · Lithuania OM8FR · Slovak Republic BG7BMG · China EB3JT · Spain XQ1KK · Chile RA9CUU · Asiatic Russia ZL1VAH · New Zealand DL1TRK · Fed. Rep. of Germany LY8O · Lithuania SP3PM · Poland

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 SP7UB

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: JO91 · 46 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 262 km (approx.)
Last such locator decoded: 2026-09-07 18:14 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	SP7UB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 16:04	40m	+5 / -	ZL1RPC/P	- / -16	4	Partial capture
09-13 05:07	80m	+10 / -	VP2MAA	- / -12	5	Partial capture
09-13 04:32	80m	0 / -	PY8WW	- / -20	3	Partial capture
09-13 04:30	80m	+8 / -	KQ4ZAX	- / -16	3	Partial capture
09-13 04:28	80m	+10 / -	VP2MAA	- / -10	3	Partial capture
09-12 04:25	80m	-3 / -	KZ7Y	- / -17	3	Partial capture
09-12 04:23	80m	-1 / -	YV6BXN	- / -16	2	Partial capture
09-10 19:54	80m	+7 / -	TM35DCM	- / -15	4	Partial capture
09-06 19:13	160m	-2 / -	R9CS/P	- / -10	2	Partial capture
09-06 19:11	160m	-11 / -	KE1HO	- / -16	3	Partial capture
09-06 18:05	160m	-9 / -	SV8DCY	- / -	3	Partial capture
09-06 17:59	160m	-4 / -18	OM8FR	-2 / -2	6	✓ Full exchange observed
09-06 16:30	40m	-4 / -	BG0FQU	- / -	2	Partial capture
09-06 15:39	80m	+13 / -	SP3PM	-15 / -	3	✓ Closing observed
09-06 15:38	80m	+11 / -7	DL1TRK	+2 / -7	5	✓ Full exchange observed
09-03 18:12	40m	-8 / -	ZL1GT	- / -	3	Partial capture
09-03 18:06	40m	+4 / -	ZL1VAH	- / -20	5	✓ Closing fragment
09-02 16:24	40m	+4 / -	YL2TM	- / -9	2	Partial capture
09-02 16:21	40m	-10 / -17	RA9CUU	-11 / -	2	✓ Closing observed
09-02 16:19	40m	-6 / -14	4X1UF	-12 / -12	4	✓ Full exchange observed
08-26 17:46	20m	- / -	BD4UJ	-18 / -	2	Partial capture
08-21 16:22	20m	- / -13	F4IVG	-10 / -	3	Partial capture
08-21 16:11	20m	-20 / -11	BG7BMG	-16 / -9	3	✓ Full exchange observed
08-21 04:16	80m	0 / -	GU4WRP	- / -	2	Partial capture
08-21 04:09	80m	+3 / -	GM7TUD	- / -	3	Partial capture
08-18 17:58	80m	+1 / -7	LY8O	+4 / -1	5	✓ Full exchange observed
08-18 17:50	80m	+1 / -	<...>	- / -9	12	Partial capture
08-18 17:47	80m	+4 / -	R8LCI	- / -	3	Partial capture
08-17 05:29	20m	- / -13	EB3JT	+10 / -	3	✓ Closing fragment
08-12 18:57	20m	-14 / -	A93MO	- / -	2	Partial capture
08-12 08:14	20m	- / -	R7OV	-15 / -	3	Partial capture
08-11 13:52	20m	- / -14	ON1DGN	-22 / -	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
180700  +0 2770  ZL1VAH SP7UB JO91 (x4)
181215  -6 1960  ZL1GT SP7UB JO91 (x3)
163015  -4 1166  BG0FQU SP7UB JO91 (x2)
043000  -8 2431  SP7UB OA4ENG R-14
160115  -8 1715  EX7CQ SP7UB -14
160445  +8  483  ZL1RPC/P SP7UB -16 (x4)

80m

UTC    dB Audio  Message
042815  +4  999  VP2MAA SP7UB -10 (x3)
043015 +14 1000  KQ4ZAX SP7UB -16 (x3)
043215  +3 1914  PY8WW SP7UB -20 (x3)
043415  +3 1000  VP2MAA SP7UB -12 (x6)

160m

UTC    dB Audio  Message
180045  -3 1044  SP7UB OM8FR RR73
180100  +0 1044  OM8FR SP7UB 73
180130 -11 1422  LY2BNL SP7UB JO91
180230  -1 1886  RW2Z SP7UB JO91
180415  -9 3022  SP7UB LY2BNL 73
180515 -11 2507  SV8DCY SP7UB JO91 (x3)
180715 -19 1588  RC9WC SP7UB JO91
191115 -12 1630  KE1HO SP7UB -16 (x3)
191330  -5 2544  R9CS/P SP7UB -10 (x2)
181430  -2 1196  CQ SP7UB JO91

20m

UTC    dB Audio  Message
053015 +11  488  SP7UB EB3JT R-13 (x2)
154145 -10 2864  <...> SP7UB R-23
160415 -12  358  C91RU SP7UB JO91 (x2)
161100 -16 2271  SP7UB BG7BMG -11
161145 -20 2272  BG7BMG SP7UB R-09 (x2)
161515 -12 2767  3B8/SQ9UM SP7UB JO91
162230  -9 2204  SP7UB F4IVG -13 (x3)
043645  +3  696  SP7UB XQ1KK RR73
174630 -16 1770  SP7UB BD4UJ PM02 (x2)

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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