S51KD — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

120 messages

Active dates

4 UTC dates

Estimated median S/N

-4 dB

Estimated 10th-90th percentile

-14 to +3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 88.

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 S51KD 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 S51KD

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

JN75 · 60 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

708 km (approx.)

Last such locator decoded

2026-07-21 13:39 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.

Recent FT8 messages decoded at SO8OO

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

UTC    dB Audio  Message
131630 -16 1597  S51KD PD9FLX JO22
131630 -10 1705  S51KD DF2RG JN69
131700 -11 1597  S51KD PD9FLX R-16
131700 -17 1705  S51KD DF2RG JN69
131730 -16 1597  S51KD PD9FLX R-18
131730 -17 1705  S51KD DF2RG JN69
131800 -18 1597  S51KD PD9FLX R-12
131800 -18 1705  S51KD DF2RG JN69
131830 -23 1597  S51KD PD9FLX R-06 (x3)
132245  -9 1338  S51KD DO7MGA JO53 (x4)

UTC    dB Audio  Message
163345  -8  629  UN7ZH S51KD JN75 (x4)
163600  -9  626  S51KD RD7LC -12
163715  -9  627  DG1RMY S51KD -11 (x3)
163945  -6 1025  R8LCX S51KD +01 (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.