IS0BOZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sardinia Most frequent locator attributed to this token: JM49

Receiver-side FT8 activity involving IS0BOZ, decoded by SO8OO in southeastern Poland. 962 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 49 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-10.

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 962 FT8 messages attributed to IS0BOZ as the transmitting token by decoded message structure across 49 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (28%), followed by 60 m (20%) and 160 m (19%). Most decodes (56%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

962

Messages attributed

UTC dates decoded

139

Active 15-min windows

-7 dB

Estimated median S/N

Bands

160m · 183 80m · 176 60m · 188 40m · 95 20m · 272 10m · 48

First attributed message: 2026-06-07
Last attributed message: 2026-09-10 06:41 UTC

Observed FT8 message patterns

Attributed sample: 962 messages
Active dates: 49 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -16 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 119, moderate (-15 to -9 dB) 305, strong (≥ -8 dB) 538.

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 IS0BOZ in decoded directed-looking exchanges:

TK5K · Corsica ×2 CT2GQA · Portugal ×2 GU4WRP · Guernsey ×2 W4IPC · United States ×2 SV1PMR · Greece NN4Q · United States JY5IB · Jordan OH2MA · Finland KB5TZN · United States F5RRS · France SP3HUU · Poland OD5KU · Lebanon

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 IS0BOZ

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: JM49 · 397 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,535 km (approx.)
Last such locator decoded: 2026-09-10 06:36 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	IS0BOZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 06:40	40m	-17 / -	J38DX	- / -15	3	Partial capture
09-10 06:37	40m	- / -	DJ0MAB	0 / -	3	Partial capture
09-10 06:36	40m	- / -	DG1ROL	+2 / -	2	Partial capture
09-10 06:35	40m	- / -3	IU2HUQ	-10 / -	2	Partial capture
09-10 04:41	40m	-11 / -	YV6BXN	- / -18	6	Partial capture
09-10 04:39	40m	-10 / -	J38DX	- / -17	2	Partial capture
09-10 04:34	60m	-4 / -	HC5F	- / -17	6	Partial capture
09-10 04:29	60m	-8 / -	6Y5HN	- / -17	3	✓ Closing fragment
09-09 04:37	80m	- / -	PA3KUS	-9 / -	6	Partial capture
09-09 04:35	80m	-16 / -	KE4EB	-11 / -11	4	Partial capture
09-09 04:35	80m	- / -	HA8LD	-12 / -	2	Partial capture
09-09 04:18	160m	- / -	SP7SEK	+8 / -	4	Partial capture
09-09 04:17	160m	-8 / -	SM7GIB	- / -18	14	Partial capture
09-09 04:17	160m	-7 / -	W4IPC	- / -14	2	✓ Closing fragment
09-09 04:16	160m	- / -4	F4FQY	-15 / -	5	Partial capture
09-09 04:15	160m	-5 / -	N4ML	- / -9	3	✓ Closing fragment
09-09 04:12	80m	-12 / -	GM6URC	-20 / -20	4	✓ Closing observed
09-09 04:12	80m	- / -	PA3KUS	-7 / -	3	Partial capture
09-09 04:06	80m	- / -	DL8TV	-6 / -	3	Partial capture
09-09 04:05	80m	-15 / -	Z62NS	- / 0	6	Partial capture
09-09 04:04	80m	- / -	PA3KUS	-9 / -	3	Partial capture
09-09 04:03	80m	-12 / -	W4IPC	- / -10	2	✓ Closing fragment
09-09 04:03	80m	- / -	F5LMJ	-16 / -	2	Partial capture
09-09 04:00	80m	-13 / -16	GU4WRP	-13 / -14	8	✓ Full exchange observed
09-09 03:48	160m	-3 / -10	F5MYK	-19 / -11	6	✓ Full exchange observed
09-09 03:48	160m	-3 / -10	E75FM	0 / -18	4	✓ Full exchange observed
09-09 03:43	160m	0 / -12	F5RRS	-8 / -3	7	✓ Full exchange observed
09-09 03:42	160m	+1 / -16	SP3HUU	+4 / -16	5	✓ Full exchange observed
09-09 03:39	160m	-6 / -	F4VTR	- / -21	2	Partial capture
09-09 03:35	160m	-2 / -20	PA0O	+4 / -14	5	✓ Full exchange observed
09-09 03:35	160m	-4 / -19	CT2GQA	-8 / -11	7	✓ Full exchange observed
09-09 03:18	60m	- / -	LZ2KV	-5 / -	2	Partial capture
09-09 03:17	60m	- / -	UR9QQ	-2 / -	2	Partial capture
09-09 03:16	60m	-2 / -	VE2JCW	- / -	2	✓ Closing fragment
09-09 03:14	60m	- / -	UR9QQ	-6 / -	2	Partial capture
09-09 03:11	60m	-2 / -	N4QQ	- / -19	3	✓ Closing fragment
09-09 03:02	80m	-11 / -	TA1CM	- / -13	6	Partial capture
09-09 02:55	40m	- / -17	JY5IB	-18 / -	2	✓ Closing fragment
09-09 02:47	160m	-6 / -16	LY3BRA	+4 / -	3	✓ Closing observed
09-09 02:44	160m	-6 / -	LY3BRA	- / -18	3	Partial capture
09-09 02:40	60m	-4 / -	VE3FF	- / -9	2	✓ Closing fragment
09-09 02:39	60m	-7 / -	NN4Q	- / -19	2	✓ Closing fragment
09-09 02:37	60m	-7 / -	J38LD	- / -15	3	Partial capture
09-01 05:36	40m	-18 / -	D44TWO	- / -18	7	Partial capture
08-30 04:27	80m	- / -	DO3KTY	-3 / -	6	Partial capture
08-30 04:26	80m	- / -14	F4BYA	+1 / -	4	✓ Closing fragment
08-30 04:19	60m	-5 / -	W4DCL	- / -12	2	✓ Closing fragment
08-30 04:15	60m	- / -	S52AS	-15 / -	3	Partial capture
08-30 04:13	60m	-2 / -	KZ8C	- / -14	2	✓ Closing fragment
08-30 04:12	60m	- / -	DL9KM	-15 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
044300 -12  560  YV6BXN IS0BOZ -18 (x2)
044430 -12  560  ZL1RPC/P IS0BOZ -19
063530 -11 2754  IS0BOZ IU2HUQ -03
063545 -15 1109  CQ IS0BOZ JM49
063600 -10 2754  IS0BOZ IU2HUQ -03
063615 -21 1110  CQ IS0BOZ JM49                        a1
063630  +1 1108  IS0BOZ DG1ROL JN58 (x2)
063730  +0 1109  IS0BOZ DJ0MAB JN49 (x3)
064015 -18 1109  J38DX IS0BOZ -15 (x3)

60m

UTC    dB Audio  Message
031815  +0  728  CQ IS0BOZ JM49
031830  -5 1180  IS0BOZ LZ2KV KN33
031845  -5  727  CQ IS0BOZ JM49
031900  -5 1180  IS0BOZ LZ2KV KN33
031930  +2  890  IS0BOZ UR9QQ KN77
042930  -7  581  6Y5HN IS0BOZ -17 (x3)
043145 -24 1535  IS0BOZ F5MOO JN07
043430  -5  581  HC5F IS0BOZ -17 (x6)

80m

UTC    dB Audio  Message
043345 -22  551  CQ IS0BOZ JM49                        a1 (x2)
043500 -10 1693  IS0BOZ HA8LD KN07
043530 -13  551  IS0BOZ KE4EB FM17
043530 -15 1693  IS0BOZ HA8LD KN07
043600 -10  551  IS0BOZ KE4EB FM17
043615 -16  551  KE4EB IS0BOZ -11
043630  -9  551  IS0BOZ KE4EB FM17
043700  -5  439  IS0BOZ PA3KUS JO21 (x2)
043745 -19  551  CQ IS0BOZ JM49
043900 -12  439  IS0BOZ PA3KUS JO21 (x4)

160m

UTC    dB Audio  Message
041915  -7  543  SM7GIB IS0BOZ -10 (x2)
042000  +8 1571  IS0BOZ SP7SEK KO10
042015  -9  542  SM7GIB IS0BOZ -10 (x3)
042130  +6 1571  IS0BOZ SP7SEK KO10
042145  -5  543  SM7GIB IS0BOZ -10 (x8)

20m

UTC    dB Audio  Message
031400  -6 2894  IS0BOZ RR73; KU4KS <...> -10
173045 -10 2776  5N0YEN IS0BOZ -15
051230  -7 1059  9K2OK IS0BOZ +00 (x6)
180615 +10  447  RI1FJL IS0BOZ -07 (x3)
180730  +9  379  IS0BOZ IC8TEM JN70
180745  +3  447  RI1FJL IS0BOZ -07 (x2)
042830 -15 2534  <...> IS0BOZ -02

10m

UTC    dB Audio  Message
064630 -11  687  SV5ADM IS0BOZ JM49 (x2)
064745 -20 1177  IS0BOZ SV5ADM -01
064800 -11  687  SV5ADM IS0BOZ R-09
072400  -7  688  IS0BOZ ON4KEB JO20 (x2)
142545  -9 2768  S79VU IS0BOZ -08
145315 -14 2594  GU4WRP IS0BOZ -01 (x3)
145700 -23 2035  CQ DX IS0BOZ JM49
073130 -18 1438  VK0DS IS0BOZ -08 (x4)

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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