NA3US — 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: United States Most frequent locator attributed to this token: EN91

Receiver-side FT8 activity involving NA3US, decoded by SO8OO in southeastern Poland. 67 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-14.

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 67 FT8 messages attributed to NA3US as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (78%), followed by 20 m (22%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (96%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 52 20m · 15

First attributed message: 2026-06-07
Last attributed message: 2026-09-14 23:27 UTC

Observed FT8 message patterns

Attributed sample: 67 messages
Active dates: 9 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -22 to -16 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 64, moderate (-15 to -9 dB) 3, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with NA3US in decoded directed-looking exchanges:

CR7BRV · Portugal EA6TU · Balearic Islands HC5RF · Ecuador AI5UB · United States EI2IXB · Ireland KK5JY · United States ND9M · United States RK6MC · European Russia S56KO · Slovenia SM7TZK · Sweden YV5KQH · Venezuela

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 NA3US

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: EN91 · 30 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,383 km (approx.)
Last such locator decoded: 2026-09-14 23:27 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	NA3US S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 19:30	40m	- / -15	M0CKX	-18 / -	5	Partial capture
09-19 01:43	40m	- / -15	HZ1TT	-14 / -	3	Partial capture
09-12 23:59	40m	-20 / -	ND9M	- / +5	2	✓ Closing fragment
09-12 23:59	40m	- / -	RN6HK	0 / -	2	Partial capture
09-12 23:57	40m	-20 / -	SM7TZK	- / -22	3	✓ Closing fragment
09-12 01:50	40m	- / -	F5PBG	-3 / -	3	Partial capture
08-28 22:16	20m	- / -	EB3JT	+8 / -	7	Partial capture
08-28 22:04	20m	- / -7	EA6TU	+6 / -	2	✓ Closing fragment
08-25 02:19	20m	- / -3	HC5RF	-6 / -	2	✓ Closing fragment
08-24 23:27	20m	-21 / -	VE5UFO	- / -22	4	Partial capture
08-24 01:46	40m	-18 / -13	EI2IXB	-6 / -	3	✓ Closing observed
08-24 01:09	40m	-17 / -8	S56KO	-7 / -	6	✓ Closing observed
08-24 01:02	40m	-18 / -15	RK6MC	+6 / -15	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
000645 -17 1625  EW2ZC NA3US EN91
024230 -19 1644  D2ACE NA3US EN91
020015 -24 1710  W6Q NA3US EN91 (x3)
021300 -19 1824  LZ123RF NA3US EN91
232700 -22 1679  W6Q NA3US EN91
014330 -19 1729  NA3US HZ1TT -15 (x3)
193000 -21 1591  NA3US M0CKX R-15 (x5)

10m

UTC    dB Audio  Message
154315  -8  752  NA3US CR7BRV RR73

20m

UTC    dB Audio  Message
232730 -21 1839  VE5UFO NA3US R-22 (x3)
021945  -7 1178  NA3US HC5RF -03 (x2)
220430  +8 2225  NA3US EA6TU -07 (x2)
221615 +11 1975  NA3US EB3JT JN01 (x7)
013945 -24 1775  NA3US 9Y4DG -01

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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