NP4EI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Puerto Rico Most frequent locator attributed to this token: FK68

Receiver-side FT8 activity involving NP4EI, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-09-04.

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 16 FT8 messages attributed to NP4EI as the transmitting token by decoded message structure across 4 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 -22 dB; no usual signal pattern is inferred.

Overview

16
Messages attributed
4
UTC dates decoded
8
Active 15-min windows
-22 dB
Estimated median S/N

Bands

40m · 16
First attributed message: 2026-08-29
Last attributed message: 2026-09-04 23:21 UTC

Observed FT8 message patterns

Attributed sample
16 messages
Active dates
4 UTC dates
Estimated median S/N
-22 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) 5, 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 NP4EI in decoded directed-looking exchanges:

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 NP4EI

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 · 12 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,360 km (approx.)
Last such locator decoded
2026-09-04 23:21 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 UTCBandNP4EI S/NCounterpartCounterpart S/NMsgsCapture
09-07 01:45 60m - / -13 SM6CCO +6 / - 4 ✓ Closing fragment
09-04 23:21 40m - / -15 DL5PH -9 / - 3 ✓ Closing fragment
09-04 23:19 40m - / -21 RV3SBS/P -1 / - 3 ✓ Closing fragment
09-04 23:04 40m - / -12 OS4K -12 / - 3 Partial capture
09-04 23:00 40m - / -21 CT2HEX -15 / - 3 ✓ Closing fragment
09-04 22:38 40m - / -10 OS4K -19 / - 4 Partial capture
09-04 22:33 40m - / - RW6MDU -6 / - 2 Partial capture
09-04 22:24 40m - / -16 F1PBZ -12 / - 4 ✓ Closing fragment
09-04 22:24 40m - / -11 LB7ZG -8 / - 3 ✓ Closing fragment
09-04 22:22 40m - / -25 EJ8JCB -10 / - 2 Partial capture
08-31 01:44 40m -12 / - TT1GD - / - 2 Partial capture
08-31 01:25 40m - / -16 A41KB -5 / - 2 Partial capture
08-29 23:51 40m -24 / - LX1FP -6 / - 3 Partial capture
08-29 23:47 40m -23 / - S54L -16 / -9 4 ✓ Closing observed
08-29 23:35 40m - / - RD7O -10 / - 5 Partial capture
08-29 23:11 40m - / -15 F4MZI -4 / - 2 Partial capture
08-29 23:08 40m - / - LZ5UY -7 / - 5 Partial capture
08-29 23:06 40m -23 / -3 DM9EE -12 / - 3 ✓ Closing observed
08-29 23:05 40m -23 / -5 N0YY -17 / +3 3 ✓ Full exchange observed
08-29 22:39 40m - / -16 EA1IOK -15 / - 4 ✓ Closing fragment
08-29 22:37 40m - / - G7LHK -6 / - 4 Partial capture
08-29 22:37 40m - / - ON4VMA -3 / - 2 Partial capture
08-29 22:34 40m - / -11 F4FTV -1 / - 4 ✓ Closing fragment
08-29 22:33 40m - / - 2E0DGP +2 / - 4 Partial capture
08-29 22:31 40m - / -10 UR1CCT +6 / - 3 ✓ Closing fragment
08-29 22:29 40m - / - DL6FC -2 / - 6 Partial capture
08-29 22:24 40m - / -15 IZ8VYU +5 / - 3 ✓ Closing fragment
08-11 20:49 20m - / - OK4SD -4 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
014500  +6 2324  NP4EI SM6CCO JO78 (x4)
40m 
UTC    dB Audio  Message
230000 -14 1477  NP4EI CT2HEX IM58 (x3)
230300 -16  797  NP4EI W8HW EL97
230430 -11 1980  NP4EI OS4K -12 (x3)
231715 -18  798  CQ NP4EI FK68
231930  -3  649  NP4EI RV3SBS/P LO04 (x3)
232115 -18  798  CQ NP4EI FK68                         a1
232130 -12  936  NP4EI DL5PH JO30 (x3)
20m 
UTC    dB Audio  Message
204900  -2 2079  NP4EI OK4SD JN79 (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.

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