9Z4A — reception at SO8OO

Observed FT8 message patterns

Attributed sample

14 messages

Active dates

2 UTC dates

Estimated median S/N

-23 dB

S/N percentile sample

Too small

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 2, 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 9Z4A in decoded directed-looking exchanges:

Most frequent locator attributed to 9Z4A

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

FK91

SO8OO receiver locator

KN09VW

Locator-centre separation

8,518 km (approx.)

Last such locator decoded

2026-09-07 04:11 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
053315 -18 1010  9Z4A ON3CCM JO10 (x4)
054615 -15 2301  9Z4A LA4GHA JP32 (x2)
054645 -13  951  9Z4A G4OZG JO02
054715 -12 2301  9Z4A LA4GHA R-18
054715  -9  952  9Z4A G4OZG JO02
054745 -12 2301  9Z4A LA4GHA 73
055815  -7 1259  9Z4A F5GN JN13 (x3)
061400 -23 1509  9Z4A F1ICS IN94 (x2)

UTC    dB Audio  Message
231845 -10 2407  9Z4A LA1PHA JP66 (x2)
232145 -16 1111  9Z4A EA1Y IN71 (x2)
232415  -5  432  9Z4A YL2KF KO27 (x2)
233515  -1 2281  9Z4A G0IUS JO01 (x9)

UTC    dB Audio  Message
020315  +0  939  9Z4A UA6HJT LN14 (x2)
044430 -18 1490  9Z4A IZ8GGE JM78 (x7)

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.