NP4JM — 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: Puerto Rico Most frequent locator attributed to this token: FK68

Receiver-side FT8 activity involving NP4JM, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-10 and 2026-10-23.

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 11 FT8 messages attributed to NP4JM as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -20 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 11

First attributed message: 2026-10-10
Last attributed message: 2026-10-23 01:28 UTC

Observed FT8 message patterns

Attributed sample: 11 messages
Active dates: 2 UTC dates
Estimated median S/N: -20 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with NP4JM in decoded directed-looking exchanges:

2E0BTX · England CT2GQA · Portugal DL1OBF · Fed. Rep. of Germany EA2DYB · Spain IT9ELM · Sicily IW9FRA · Sicily LZ2II · Bulgaria R5AV · European Russia SP9UPH · Poland

Most frequent locator attributed to NP4JM

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: FK68 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,360 km (approx.)
Last such locator decoded: 2026-10-23 01:28 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	NP4JM S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 01:18	40m	- / -17	IT9ELM	-13 / -	2	✓ Closing fragment
10-23 00:55	40m	- / -22	EA2DYB	+8 / -	3	✓ Closing fragment
10-10 01:28	40m	- / -21	CT2GQA	-11 / -	3	✓ Closing fragment
10-10 01:13	40m	- / -	R6LE	-6 / -	2	Partial capture
10-10 01:13	40m	-22 / -	IW9FRA	- / -15	2	✓ Closing fragment
10-10 01:03	40m	-21 / -	2E0BTX	-21 / -	2	✓ Closing observed
10-10 01:00	40m	-19 / -	YO6GLT	- / -	2	Partial capture
10-07 01:42	40m	- / -15	IZ8DBJ	-24 / -	2	Partial capture
10-07 01:31	40m	- / -	DK5WL	+1 / -	3	Partial capture
10-07 01:30	40m	- / -8	LZ2II	0 / -	2	✓ Closing fragment
10-07 01:21	40m	- / -7	DL1OBF	+1 / -	3	✓ Closing fragment
08-11 01:49	40m	- / -	R5AV	-22 / -	2	✓ Closing fragment
08-11 01:12	20m	- / -	SV5BYP	-23 / -	2	Partial capture
08-09 00:56	40m	- / -	G7NPW	-20 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
011315 -24 1767  IW9FRA NP4JM -15
011330  -4 2234  NP4JM R6LE LN07
011345 -20 1767  IW9FRA NP4JM RR73
011400  -8 2234  NP4JM R6LE LN07
012830 -10 1767  NP4JM CT2GQA IM58 (x3)
005530 +10  296  NP4JM EA2DYB IN83 (x3)
005715 -24 1767  CQ NP4JM FK68                         a1
011800 -11 1667  NP4JM IT9ELM -17 (x2)
012400 -11 1590  NP4JM MJ/TA1HZ R-18
012815 -24 1767  CQ NP4JM FK68

20m

UTC    dB Audio  Message
011230 -23 1893  NP4JM SV5BYP KM46 (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

CW history is temporarily unavailable.

Explore CW reception at SO8OO

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