S51AD — 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: Slovenia Most frequent locator attributed to this token: JN76

Receiver-side FT8 activity involving S51AD, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-20 and 2026-10-22.

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 36 FT8 messages attributed to S51AD as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (86%), followed by 80 m (14%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.

Overview

36
Messages attributed
3
UTC dates decoded
4
Active 15-min windows
-4 dB
Estimated median S/N

Bands

80m · 5 40m · 31
First attributed message: 2026-08-20
Last attributed message: 2026-10-22 17:20 UTC

Observed FT8 message patterns

Attributed sample
36 messages
Active dates
3 UTC dates
Estimated median S/N
-4 dB
Estimated 10th-90th percentile
-12 to +2 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 29.

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 S51AD 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 S51AD

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
JN76 · 15 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
631 km (approx.)
Last such locator decoded
2026-10-22 17:20 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 UTCBandS51AD S/NCounterpartCounterpart S/NMsgsCapture
10-22 17:22 40m - / -3 DD7EE +2 / - 3 ✓ Closing fragment
10-22 17:20 40m -10 / - M9DNC - / -17 2 Partial capture
10-22 17:17 80m 0 / - OM1TD - / - 2 Partial capture
10-22 17:15 80m +1 / - DO2ZZ -4 / -17 5 ✓ Full exchange observed
10-20 08:12 40m -1 / -3 YL3ASK -8 / -22 6 ✓ Full exchange observed
10-20 08:11 40m -7 / - PD0KVE - / - 2 Partial capture
10-20 08:08 40m -5 / - PD1ACS -23 / -6 5 ✓ Closing observed
10-20 08:06 40m -4 / - PB0ACU -22 / -9 4 ✓ Closing observed
10-20 08:05 40m -6 / +2 DJ0MAB +2 / -2 4 ✓ Full exchange observed
10-20 08:04 40m -2 / - ON8PB - / -4 3 ✓ Closing fragment
10-20 08:02 40m -6 / - OS4K - / -20 2 ✓ Closing fragment
10-20 08:01 40m -3 / - ON6DZ - / -6 3 ✓ Closing fragment
10-20 07:59 40m -2 / - G8KHF - / -12 4 ✓ Closing fragment
08-20 01:26 40m - / -5 EB3JT -2 / - 3 ✓ Closing fragment
08-20 01:25 40m - / -13 NP3RK -11 / - 2 ✓ Closing fragment
08-20 01:22 40m - / -12 PV8AJ -12 / - 2 ✓ Closing fragment
08-20 01:17 40m - / - EA5HM -6 / - 5 Partial capture
08-20 01:14 40m - / -3 DL9KM -16 / - 5 ✓ Closing fragment
08-20 01:14 40m - / -10 UB4CJS -16 / - 11 Partial capture
08-20 01:12 40m -14 / - D2UY - / -17 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
081015 -23 1748  S51AD PD1ACS RR73
081030 -10  794  PD1ACS S51AD 73
081130 -10  909  PD0KVE S51AD JN76 (x2)
081230  -4  909  YL3ASK S51AD JN76
081245 -10  687  S51AD YL3ASK -03
081300  +2  909  YL3ASK S51AD R-22 (x2)
081345  -7  687  S51AD YL3ASK RR73
081400  +1  909  YL3ASK S51AD 73
172015  -7  628  M9DNC S51AD JN76 (x2)
172200  +0  913  S51AD DD7EE JO41 (x3)
80m 
UTC    dB Audio  Message
171500  -2 1948  DO2ZZ S51AD JN76
171515  -2 2496  S51AD DO2ZZ +11
171530  +2 1947  DO2ZZ S51AD R-17
171545  -6 2496  S51AD DO2ZZ RR73
171600  +2 1947  DO2ZZ S51AD 73
171715  +5 1947  OM1TD S51AD JN76 (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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