F1SZC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN95

Receiver-side FT8 activity involving F1SZC, decoded by SO8OO in southeastern Poland. 3,251 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 73 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-17.

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 3,251 FT8 messages attributed to F1SZC as the transmitting token by decoded message structure across 73 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 10 m (17%) and 80 m (5%). Most decodes (52%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -6.9 dB.

Overview

3,251

Messages attributed

UTC dates decoded

437

Active 15-min windows

-6.9 dB

Estimated median S/N

Bands

80m · 171 40m · 120 20m · 2,400 10m · 560

First attributed message: 2026-06-08
Last attributed message: 2026-09-17 20:33 UTC

Observed FT8 message patterns

Attributed sample: 3,251 messages
Active dates: 73 UTC dates
Estimated median S/N: -6.9 dB
Estimated 10th-90th percentile: -18 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 546, moderate (-15 to -9 dB) 843, strong (≥ -8 dB) 1,862.

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 F1SZC in decoded directed-looking exchanges:

OZ5AGJ · Denmark ×4 DJ0MAB · Fed. Rep. of Germany ×3 YO4NF · Romania ×3 CR7BRV · Portugal ×2 EC5M · Spain ×2 IZ4JMA · Italy ×2 LX1JX · Luxembourg ×2 BA3QIQ · China ×2 DM5TB · Fed. Rep. of Germany ×2 E75AA · Bosnia-Herzegovina ×2 EA3HMM · Spain ×2 F5BRF · France ×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 F1SZC

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: IN95 · 1,927 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,767 km (approx.)
Last such locator decoded: 2026-09-17 20:33 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	F1SZC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 20:34	80m	- / -13	DL9KM	-15 / -	5	✓ Closing fragment
09-17 20:33	80m	-22 / -5	YL2IV	+3 / -	5	✓ Closing observed
09-17 20:32	80m	-23 / +1	DK9CK	-11 / -6	6	✓ Full exchange observed
09-17 20:30	80m	-19 / -	DO1TEM	- / -8	2	✓ Closing fragment
09-17 20:26	80m	-12 / -4	DO2HC	-12 / -	7	✓ Closing observed
09-17 20:24	80m	-19 / -	JH2FXK	- / -	3	Partial capture
09-17 20:22	80m	- / -	DL6UM	+1 / -	5	Partial capture
09-17 20:16	80m	-17 / -	YU7BW	- / -	2	Partial capture
09-17 20:08	80m	-22 / -10	HB3YOY	-8 / -	3	✓ Closing observed
09-17 20:06	80m	-22 / -11	PA3GDY	-1 / 0	5	✓ Full exchange observed
09-16 23:14	80m	-9 / -4	F4EGM	-14 / -1	3	✓ Full exchange observed
09-16 23:10	80m	-13 / -7	G0ORC	-12 / -2	4	✓ Full exchange observed
09-16 23:07	80m	-14 / -16	YO4NF	+6 / -7	4	✓ Full exchange observed
09-16 23:06	80m	- / -10	9A5E	+6 / -	2	✓ Closing fragment
09-16 23:00	80m	- / -16	YO4NF	0 / -	2	Partial capture
09-16 22:55	80m	- / -	ON4MAP	-24 / -	3	✓ Closing fragment
09-16 22:55	80m	- / -14	YO4NF	+3 / -	2	Partial capture
09-16 22:52	80m	- / -9	ON5WR	-22 / -	2	✓ Closing fragment
09-16 22:48	80m	- / -10	DF2RG	-6 / -	2	✓ Closing fragment
09-16 22:23	80m	- / +1	EA1SAL	-18 / -	2	✓ Closing fragment
09-16 22:15	80m	-24 / -9	LX1JX	+7 / -	4	✓ Closing observed
09-16 22:11	40m	-14 / -	WF7B	- / -	3	Partial capture
09-16 21:57	40m	-16 / -15	HZ1TT	-12 / -4	5	✓ Full exchange observed
09-16 21:56	80m	- / -14	SV5ADM	-9 / -	3	Partial capture
09-16 21:41	80m	- / -	SP1SZ	-6 / -	3	Partial capture
09-16 21:37	80m	-22 / -	DO1OAS	-13 / -18	21	Partial capture
09-16 20:07	80m	- / -	DL6UM	+1 / -	7	Partial capture
09-16 20:05	80m	- / -	DB100FT	-3 / -	2	Partial capture
09-16 20:04	80m	- / -11	G0JEI	-12 / -	2	Partial capture
09-14 05:59	40m	- / -2	GM6URC	-20 / -	2	✓ Closing fragment
09-07 21:13	40m	-12 / -	K1FUG	- / -	2	Partial capture
09-05 18:38	40m	-15 / -	F4JAK	- / -	2	Partial capture
09-02 18:16	40m	-4 / -	F8DVC	- / -	8	Partial capture
08-31 17:26	20m	- / -11	RW3DDZ	+3 / -	6	✓ Closing fragment
08-31 17:22	20m	- / -10	F8FUA	+17 / -	3	✓ Closing fragment
08-31 12:45	20m	-7 / -	ON/HB9HVW/P	- / -24	3	Partial capture
08-31 12:30	20m	- / -	RV6F	+1 / -	6	Partial capture
08-31 12:26	20m	-2 / -6	F4IFO	+3 / -	4	✓ Closing observed
08-31 12:23	20m	-2 / -	F1BHB	0 / 0	2	✓ Closing observed
08-31 12:17	20m	- / -	M9NAM	-6 / -	3	Partial capture
08-31 12:13	20m	+3 / -	RI1FJL	- / -	5	Partial capture
08-31 11:38	20m	-2 / 0	II7MGBT	-5 / +2	4	Partial capture
08-31 11:20	20m	-5 / -	RI1FJL	- / -	5	Partial capture
08-31 11:06	20m	-3 / -	N4RWG	- / -8	4	Partial capture
08-30 21:23	20m	+4 / -9	TJ1GD	-4 / -	3	Partial capture
08-30 21:20	20m	+3 / -	KD6KHK	- / -	2	Partial capture
08-30 20:07	20m	+4 / -	RI1FJL	- / -	2	Partial capture
08-30 20:03	20m	+7 / -	RI1FJL	- / -	3	Partial capture
08-30 20:01	20m	+2 / -	WA4FU	- / -	3	Partial capture
08-30 19:58	20m	0 / -	RI1FJL	- / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
112415 -19 1693  JH0INP F1SZC IN95 (x3)
112545 -16 1693  CQ F1SZC IN95 (x2)
112645 -16 1693  DO1ZK F1SZC -10 (x2)
113100 -20 1693  JA9PPC F1SZC IN95 (x2)
113730 -24 1693  JA0GCI F1SZC RR73 (x2)
113830 -20 1693  CQ F1SZC IN95
105530 -20 2105  CR7BRV F1SZC 73
105600 -17 2105  CQ F1SZC IN95
123700 -22 1767  F1SZC <...> +00

80m

UTC    dB Audio  Message
203315 -14 1810  F1SZC DK9CK R+01
203315 -13 1354  F1SZC DK3TNA JO62
203330 -22 1576  YL2IV F1SZC IN95
203345  +6  575  F1SZC YL2IV -05
203345 -13 1810  F1SZC DK9CK R+01
203415  +0 1575  F1SZC YL2IV -06
203415  -9 1810  F1SZC DK9CK R+01
203445  +3 1575  F1SZC YL2IV -06
203445  -8 1883  F1SZC DL9KM JN68
203445 -12 1810  F1SZC DK9CK 73
203515  +2 1574  F1SZC YL2IV RR73
203515 -16 1883  F1SZC DL9KM JN68 (x4)

160m

UTC    dB Audio  Message
221615 -10  383  F1SZC LX1JX RR73

40m

UTC    dB Audio  Message
041415 -10 2330  F1SZC HK3TY -15 (x2)
043215 -19 1608  F1SZC US2YW KN28
044045  -4 1694  F1SZC LZ936BA -10
044200 -17 1609  W9JOY F1SZC IN95
044330 -19 1609  K9UWA F1SZC IN95
044645  -6  400  F1SZC F4CVQ RR73
215730  -7 1729  F1SZC HZ1TT -15
215745 -18 1608  HZ1TT F1SZC R-04
215800 -17 1729  F1SZC HZ1TT RR73
215815 -15 1608  HZ1TT F1SZC 73
215830 -12 1729  F1SZC HZ1TT 73
221145 -13 1608  WF7B F1SZC IN95 (x3)

20m

UTC    dB Audio  Message
172200 +18 1743  F1SZC F8FUA -10 (x3)
172500  -4  690  F1SZC SM7JKW 73
172600  +5 2758  F1SZC RW3DDZ KO86 (x6)
173200 -13 1691  F1SZC F4ACR IN96
173415  -7 1691  CQ F1SZC IN95
173730  -3 1692  ZS1DX F1SZC IN95
173830  -7 1691  BG4OOO F1SZC IN95
174215 -20 2491  F1SZC ZS1DX RR73

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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