F1SZC — 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: France Most frequent locator attributed to this token: IN95

Receiver-side FT8 activity involving F1SZC, decoded by SO8OO in southeastern Poland. 3,405 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 83 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-25.

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 3,405 FT8 messages attributed to F1SZC as the transmitting token by decoded message structure across 83 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (70%), followed by 10 m (16%) and 80 m (8%). Most decodes (53%) 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 -7 dB.

Overview

3,405

Messages attributed

UTC dates decoded

468

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 282 40m · 163 20m · 2,400 10m · 560

First attributed message: 2026-06-08
Last attributed message: 2026-10-25 06:20 UTC

Observed FT8 message patterns

Attributed sample: 3,405 messages
Active dates: 83 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -18 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 596, moderate (-15 to -9 dB) 867, strong (≥ -8 dB) 1,942.

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:

LX1JX · Luxembourg ×2 DM5TB · Fed. Rep. of Germany ×2 JA0FIL · Japan ×2 K4YT · United States ×2 S58S · Slovenia ×2 OZ5AGJ · Denmark ×2 RW1CW · European Russia ×2 DO5PY · Fed. Rep. of Germany ×2 F4ESO · France ×2 CR7BRV · Portugal DC0EV · Fed. Rep. of Germany DN9AD · Fed. Rep. of Germany

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 · 2,003 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,767 km (approx.)
Last such locator decoded: 2026-10-25 06:20 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
10-25 05:53	80m	-7 / +5	ON1JP	-19 / -9	4	✓ Full exchange observed
10-25 05:53	80m	-4 / -1	DF4WQ	-5 / -9	7	✓ Full exchange observed
10-25 05:51	80m	-2 / +3	F1MXE	-4 / 0	5	✓ Full exchange observed
10-25 05:49	80m	-4 / -	KB3HGW	- / -16	2	✓ Closing fragment
10-25 05:48	80m	- / -3	DL1VVQ	+5 / -	3	✓ Closing fragment
10-25 05:42	80m	- / -8	SQ6ELK	+6 / -	5	✓ Closing fragment
10-25 05:41	80m	- / -15	SP6FME	+15 / -	3	✓ Closing fragment
10-25 05:39	80m	-5 / +2	GU4WRP	-10 / -1	3	✓ Full exchange observed
10-25 05:34	80m	- / -1	DL1VVQ	+2 / -	4	Partial capture
10-25 05:34	80m	-6 / -15	WA4FU	-12 / -4	4	✓ Full exchange observed
10-25 05:34	80m	- / -18	S50XX	+7 / -	7	✓ Closing fragment
10-25 05:30	80m	- / -7	GU4WRP	-7 / -	3	Partial capture
10-25 05:27	80m	- / -9	OE5DML	+12 / -	3	✓ Closing fragment
10-25 05:26	80m	- / -7	DO5PY	+4 / -	3	✓ Closing fragment
10-25 05:25	80m	- / +6	G0BLB	+11 / -	2	✓ Closing fragment
10-25 05:20	80m	- / +6	F5OYM	+4 / -	2	✓ Closing fragment
10-25 05:20	80m	- / -	OE5DML	+2 / -	2	Partial capture
10-25 05:20	80m	- / -20	S52UF	-1 / -	7	✓ Closing fragment
10-25 05:19	80m	- / -	SP6FME	+13 / -	3	Partial capture
10-25 05:14	80m	- / -6	DL8WEM	+10 / -	4	Partial capture
10-25 05:14	80m	-4 / -10	LX1TI	+17 / -2	4	✓ Full exchange observed
10-25 05:00	80m	-3 / -	C5R	- / -15	3	Partial capture
10-25 04:59	80m	- / 0	EG46PPA	-24 / -	2	Partial capture
10-25 04:58	80m	-6 / -	R2AL	-5 / -12	5	Partial capture
10-25 04:58	80m	- / -	SP6FME	+8 / -	3	Partial capture
10-25 04:51	80m	-2 / -16	R2AL	-3 / -7	12	Partial capture
10-25 04:49	80m	-10 / -	F5OAM	-3 / +1	5	✓ Full exchange observed
10-25 04:45	40m	-6 / -	K3RH	- / -	2	Partial capture
10-25 04:40	40m	+2 / -	TL8GD	- / -25	2	✓ Closing fragment
10-22 17:48	40m	- / -7	SV1ENG	-9 / -	3	✓ Closing fragment
10-16 20:16	40m	- / -	HB9EOT/P	-1 / -	3	Partial capture
10-16 20:09	40m	-4 / -	C5R	- / -18	9	Partial capture
10-16 19:24	40m	-7 / -	S79VU	- / -	2	Partial capture
10-16 19:22	40m	-5 / -	F4HSB	- / -13	3	Partial capture
10-16 19:19	40m	-6 / -	F1GUQ	-10 / -6	5	✓ Full exchange observed
10-13 20:33	40m	- / -	RZ4FWA	-12 / -	4	Partial capture
10-13 20:30	40m	-1 / -7	UN0GY	-14 / -16	6	✓ Full exchange observed
10-13 20:29	80m	-6 / -	DO8JB	- / -	2	Partial capture
10-13 20:26	80m	- / -5	ON2BCB	-2 / -	2	✓ Closing fragment
10-13 20:02	80m	-5 / -	F5RMK	-12 / +2	4	✓ Closing observed
10-11 21:27	80m	-18 / -	PE4C	-9 / -10	4	✓ Closing observed
10-11 21:24	80m	-7 / -5	LA4NM	-8 / 0	4	Partial capture
10-11 21:23	80m	-10 / -	IW9FRA	- / -	2	Partial capture
10-11 21:19	80m	-9 / -17	SM7TZK	-1 / -7	6	✓ Full exchange observed
10-11 21:07	80m	- / -10	G6PWS	+5 / -	2	✓ Closing fragment
10-11 21:02	80m	-6 / -10	IV3IHV	+5 / -3	4	✓ Full exchange observed
10-11 20:34	80m	-17 / -14	IZ8DFO	+10 / -9	3	✓ Full exchange observed
10-11 20:31	80m	-14 / -13	IZ8DFO	-1 / -7	5	✓ Full exchange observed
10-06 20:59	80m	- / +5	F5RAV	-13 / -	5	Partial capture
10-06 20:59	80m	-11 / -	R2AL	-2 / -18	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
055300  -5 2499  CQ F1SZC IN95
055315  -4 2502  F1SZC DF4WQ JN39
055345 -24 1031  F1SZC ON1JP +05
055345  -4 2502  F1SZC DF4WQ JN39
055400  -2 2499  ON1JP F1SZC R-09
055415 -14 1031  F1SZC ON1JP RR73
055430 -12 2499  ON1JP F1SZC 73
055445  -5 2503  F1SZC DF4WQ JN39
055500  -5 2499  DF4WQ F1SZC -09
055515  -6 2502  F1SZC DF4WQ R-01
055530  -4 2499  DF4WQ F1SZC RR73
055545  -8 2502  F1SZC DF4WQ 73
055600  +2 2499  CQ F1SZC IN95
055745  -6 2499  F1SZC DO1SPK JO41
062045  -7 2500  II4NTTI F1SZC IN95

40m

UTC    dB Audio  Message
201630  +1 1186  F1SZC HB9EOT/P +16 (x3)
174800 -11 2104  F1SZC SV1ENG -07
174815  -7 2531  IK5NAY F1SZC IN95
174830  -6 2104  F1SZC SV1ENG -07 (x2)
051715  -4 2532  PY7ZC F1SZC IN95
044045  +2 2530  TL8GD F1SZC R-25 (x2)
044315  -3 2530  EL2BG F1SZC IN95
044415  -1 2530  AA3DP F1SZC IN95
044515  -7 2530  K3RH F1SZC IN95 (x2)
060630  +1 2410  F1SZC S55A -07

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

160m

UTC    dB Audio  Message
221615 -10  383  F1SZC LX1JX RR73

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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