IZ4JMA — 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: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IZ4JMA, decoded by SO8OO in southeastern Poland. 3,574 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 78 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-18.

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 3,574 FT8 messages attributed to IZ4JMA as the transmitting token by decoded message structure across 78 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (53%), followed by 40 m (23%) and 60 m (14%). The busiest six-hour window was 15:00-21:00 UTC, containing 43% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9.3 dB.

Overview

3,574

Messages attributed

UTC dates decoded

532

Active 15-min windows

-9.3 dB

Estimated median S/N

Bands

60m · 505 40m · 825 20m · 1,900 10m · 344

First attributed message: 2026-06-07
Last attributed message: 2026-10-18 18:28 UTC

Observed FT8 message patterns

Attributed sample: 3,574 messages
Active dates: 78 UTC dates
Estimated median S/N: -9.3 dB
Estimated 10th-90th percentile: -17 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 554, moderate (-15 to -9 dB) 1,413, strong (≥ -8 dB) 1,607.

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 IZ4JMA in decoded directed-looking exchanges:

PD0OTH · Netherlands ×3 DA1EA · Fed. Rep. of Germany ×2 F4NGR · France ×2 ON7VZ · Belgium ×2 R2FDP · Kaliningrad ×2 R7ZY · European Russia ×2 TA1MB · European Turkey ×2 DG0LFG · Fed. Rep. of Germany ×2 DG3TF · Fed. Rep. of Germany ×2 DL4HTK · Fed. Rep. of Germany ×2 EA1AJT · Spain ×2 F4HSB · 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 IZ4JMA

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: JN54 · 1,989 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,013 km (approx.)
Last such locator decoded: 2026-10-18 18:28 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	IZ4JMA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-18 18:28	60m	- / -14	ER3ZW	+3 / -	2	Partial capture
10-18 06:15	60m	-11 / -4	EA1JWG	-8 / 0	5	✓ Full exchange observed
10-18 06:13	60m	-10 / -8	PA2AT	-5 / +5	7	✓ Full exchange observed
10-18 06:12	60m	-10 / -	DB1HEF	- / -	2	✓ Closing fragment
10-18 06:07	60m	-10 / -6	DL1CF	+9 / +8	4	✓ Full exchange observed
10-18 06:06	60m	- / -9	SP6IYR	+4 / -	2	✓ Closing fragment
10-18 05:55	40m	-8 / -4	DA1MN	+8 / -1	4	✓ Full exchange observed
10-18 05:52	40m	-11 / -	F4JJM	- / -9	2	Partial capture
10-18 05:50	40m	-8 / -	HI3LER	- / -	2	✓ Closing fragment
10-18 05:35	40m	-9 / -	YV5YDT	-24 / -11	5	✓ Closing observed
10-18 05:26	40m	+1 / -17	RA3AJT	+11 / -	4	✓ Closing observed
10-18 05:15	40m	-16 / -	W1UU	- / -13	2	Partial capture
10-17 21:33	60m	-6 / -	F5NBU	- / -	3	Partial capture
10-17 21:28	60m	-6 / -	SP6K	- / -18	6	✓ Closing fragment
10-17 21:16	60m	-10 / -	OZ7CL	- / -	2	Partial capture
10-17 21:10	60m	-6 / -9	EA1SAL	-9 / -10	9	✓ Full exchange observed
10-17 21:02	40m	-21 / -12	G0RWF	+5 / -	4	Partial capture
10-17 20:29	40m	-8 / -15	CR6AEP	-2 / -	4	✓ Closing observed
10-17 20:22	40m	-10 / -6	M7HQE	-18 / -	4	✓ Closing observed
10-17 20:20	40m	-9 / -10	CR6AEP	-6 / -10	3	Partial capture
10-17 20:08	40m	-15 / -6	LZ2CC	-10 / -	3	✓ Closing observed
10-17 20:06	40m	- / -10	IU3WON	+4 / -	2	✓ Closing fragment
10-17 19:56	40m	+2 / -7	PA1L	+16 / -	4	Partial capture
10-17 19:54	40m	-2 / -	DK3ID	- / -8	3	✓ Closing fragment
10-17 19:52	40m	-3 / -	SP2MGR/P	- / -3	2	Partial capture
10-17 06:17	60m	- / -7	DK2MAX	-13 / -	2	✓ Closing fragment
10-17 06:06	60m	- / -19	DH7TS	-2 / -	2	✓ Closing fragment
10-17 06:05	60m	-11 / -	F4GMM	-5 / -	2	✓ Closing observed
10-17 05:58	60m	- / -16	G0ABI	-2 / -	3	✓ Closing fragment
10-17 05:53	60m	- / -15	SQ2PHC	-3 / -	2	✓ Closing fragment
10-17 05:37	60m	-14 / -	F4LRA	- / -8	2	✓ Closing fragment
10-17 05:35	60m	-10 / +4	S56KZ	-7 / +1	6	✓ Full exchange observed
10-17 05:33	60m	-8 / -	EA1JWG	- / -	2	Partial capture
10-17 05:31	60m	-10 / -	PA2MRK	- / -15	3	✓ Closing fragment
10-17 05:29	60m	-10 / -	DL6ZXG	- / -	2	Partial capture
10-17 05:25	60m	-10 / -4	S59SV	+7 / -	3	✓ Closing observed
10-16 19:41	60m	-12 / -13	DB6FA	-2 / -	7	✓ Closing observed
10-16 19:39	60m	-16 / -14	DG7AK	-5 / -	3	✓ Closing observed
10-16 19:38	60m	- / -	HB9SFL	+4 / -	2	✓ Closing fragment
10-16 19:34	60m	-10 / -12	HB9SFL	-7 / -10	5	Partial capture
10-16 19:32	60m	-4 / -18	IQ3TR	-8 / -11	5	✓ Full exchange observed
10-16 19:29	60m	-4 / -3	DL4HTK	-2 / -14	5	✓ Full exchange observed
10-16 19:19	60m	-8 / -9	IS0LAY	-17 / -4	5	✓ Full exchange observed
10-16 19:18	60m	-18 / -11	IV3NDR	-4 / -	4	Partial capture
10-16 19:13	60m	- / -14	EB5FMC	-16 / -	3	✓ Closing fragment
10-16 19:10	60m	-14 / -4	DL1MST	-8 / -13	3	✓ Full exchange observed
10-16 19:08	60m	-20 / -2	DL1SWT	0 / -7	4	✓ Full exchange observed
10-16 19:06	60m	-22 / -	SP3RK	0 / -8	3	✓ Closing observed
10-16 19:05	60m	-22 / -11	EA5AOK	-15 / -11	3	Partial capture
10-16 19:02	60m	- / -9	SP3EIE	-18 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
061400  -7  857  IZ4JMA PA2AT -08
061415  -9  640  PA2AT IZ4JMA R+05
061430  -3  857  IZ4JMA PA2AT RR73
061445 -11  640  PA2AT IZ4JMA 73
061500  -5  857  IZ4JMA PA2AT JO21
061515 -11  640  EA1JWG IZ4JMA JN54
061530  -4  857  IZ4JMA PA2AT R+00
061600  -7  641  IZ4JMA EA1JWG -04
061615 -11  640  EA1JWG IZ4JMA R+00
061630  -8  641  IZ4JMA EA1JWG RR73
061645 -12  640  EA1JWG IZ4JMA 73
062200 -11  640  DK9RC IZ4JMA JN54
182800  +3 1614  IZ4JMA ER3ZW -14
182800 -12  800  9A3NF IZ4JMA JN54
182830  +3 1614  IZ4JMA ER3ZW -14

40m

UTC    dB Audio  Message
053645 -11 2348  YV5YDT IZ4JMA R-11
053700 -24 1354  IZ4JMA YV5YDT RR73
053945 -10 2348  C5R IZ4JMA R-21
054230 -15 2347  YV5KG IZ4JMA JN54
055000  -8  967  HI3LER IZ4JMA JN54 (x2)
055230 -13  967  F4JJM IZ4JMA JN54 (x2)
055515  +4 2899  IZ4JMA DA1MN -04
055530  -8  967  DA1MN IZ4JMA R-01
055545 +12 2899  IZ4JMA DA1MN RR73
055600  -9  967  DA1MN IZ4JMA 73
055700 -10  967  F4CQS IZ4JMA JN54
060045 -14 2233  RW6ATD IZ4JMA JN54
060145 -11 2233  DM5NSA IZ4JMA JN54

20m

UTC    dB Audio  Message
204015  +1 1123  EA2DDG IZ4JMA JN54
050530  -8 2003  IZ4JMA UT4EK -10
185015  +5  998  DH8KAM IZ4JMA JN54
185430  -6  641  IK8IUQ IZ4JMA JN54
185600  +4 2466  GJ6WRI IZ4JMA JN54
185700  -1 2467  HA1ORA IZ4JMA JN54
185800  +1 2467  YI1QEA IZ4JMA JN54
185845  +2 2467  M9RPO IZ4JMA JN54 (x2)
190000  -3 2467  M0PEI IZ4JMA JN54 (x2)
190200  +3 2182  R9SB IZ4JMA R+03 (x2)
190415  +7 1827  IZ4JMA PD1GOL +04
190445  -3 2182  DH8KAM IZ4JMA JN54

10m

UTC    dB Audio  Message
162000 -24 1726  IZ4JMA DL1CBS/P RRR
162230 -15 2212  IZ4JMA DG8DC +06 (x2)
160330 -19  792  PD4DX IZ4JMA R+08
160530 -13  790  F6DYA IZ4JMA JN54
160830 -17  787  M6PVT IZ4JMA JN54
161100 -16  785  SP8WB IZ4JMA JN54
161230 -14  785  EW3DY IZ4JMA JN54
174945 -17 1605  PY4BSC IZ4JMA JN54
175200 -10  797  CR7CDC IZ4JMA JN54 (x2)
180100 -10  792  SV2JU IZ4JMA JN54
180200 -11  792  UX1AA IZ4JMA JN54
180345 -13  791  PY4BSC IZ4JMA JN54 (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.

CW

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

Explore CW reception at SO8OO

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