JI1CZK — 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: Japan Most frequent locator attributed to this token: PM95

Receiver-side FT8 activity involving JI1CZK, decoded by SO8OO in southeastern Poland. 73 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-19.

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 73 FT8 messages attributed to JI1CZK as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 40 m (3%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 2 20m · 71

First attributed message: 2026-06-06
Last attributed message: 2026-09-19 20:38 UTC

Observed FT8 message patterns

Attributed sample: 73 messages
Active dates: 7 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -21 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 16.

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 JI1CZK in decoded directed-looking exchanges:

CN8NS · Morocco EB5AL · Spain LA8ENA · Norway 4O4A · Montenegro OT7K · Belgium UA4FKT · European Russia UN7LZ · Kazakhstan XX9TXN · Macao YO7CFD · Romania

Most frequent locator attributed to JI1CZK

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: PM95 · 45 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-09-19 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	JI1CZK S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 14:57	80m	- / -13	UN7LZ	-10 / -	2	✓ Closing fragment
11-01 14:51	80m	- / -	UN7LZ	-9 / -	3	Partial capture
11-01 14:51	80m	- / -16	YO7CFD	0 / -	4	✓ Closing fragment
10-30 21:00	80m	- / -20	4O4A	+20 / -	3	✓ Closing fragment
10-28 20:30	80m	- / -9	UA4FKT	+15 / -	3	✓ Closing fragment
10-28 20:26	80m	- / -	UA4FKT	+15 / -	2	Partial capture
10-24 15:11	80m	- / -13	XX9TXN	-24 / -	2	✓ Closing fragment
09-19 20:39	40m	- / -	PD1EN	-3 / -	4	Partial capture
09-19 20:37	40m	-15 / -21	EB5AL	-3 / -	6	✓ Closing observed
09-19 20:36	40m	- / -18	CN8NS	-5 / -	2	✓ Closing fragment
09-19 20:26	40m	- / -	F5NBU	+15 / -	4	Partial capture
09-17 20:46	40m	- / -	EA3EDU	-9 / -	8	Partial capture
09-17 20:44	40m	- / -12	LA8ENA	-10 / -	2	✓ Closing fragment
08-28 21:47	20m	-13 / -	Z62NS	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
203030 +12 2722  JI1CZK UA4FKT LO23 (x3)
210030 +21 2635  JI1CZK 4O4A -20 (x3)
145130  +2  767  JI1CZK YO7CFD -16
145130  -9 2165  JI1CZK UN7LZ MO13
145200  +1  768  JI1CZK YO7CFD -16
145200 -11 2165  JI1CZK UN7LZ MO13
145230  -1  768  JI1CZK YO7CFD RR73
145230  -7 2165  JI1CZK UN7LZ MO13
145300  -4  767  JI1CZK YO7CFD RR73
145700  -9 2165  JI1CZK UN7LZ R-13 (x2)

40m

UTC    dB Audio  Message
202800 +15  510  JI1CZK F5NBU JN28
203345 -12  509  CN8NS JI1CZK PM95
203600  -5 1886  JI1CZK CN8NS R-18 (x2)
203700  -2  690  JI1CZK EB5AL IM99 (x3)
203815 -15  509  EB5AL JI1CZK RR73
203830  -4  690  JI1CZK EB5AL R-21
203900  -4 1608  JI1CZK PD1EN JO32
203900  -3  690  JI1CZK EB5AL 73
203930  -1 1608  JI1CZK PD1EN JO32 (x3)
131545  -5 2590  JI1CZK OI7AX -05

20m

UTC    dB Audio  Message
214745 -16 2378  Z62NS JI1CZK PM95 (x3)

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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