Z31PM — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

195 messages

Active dates

11 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-18 to -1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 44, moderate (-15 to -9 dB) 60, strong (≥ -8 dB) 91.

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 Z31PM 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 Z31PM

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

KN01 · 46 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

940 km (approx.)

Last such locator decoded

2026-09-08 16:14 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
201630 -10 1807  Z31PM YO2MTG KN05
201630  +5 2491  Z31PM SP5EXA R-20
201700 -10 1545  Z31PM DJ3JD JO52
201700  -7 1807  Z31PM YO2MTG KN05
201700 +11 2491  Z31PM SP5EXA 73
201730  -9 1545  Z31PM DJ3JD JO52
201730  -3 1807  Z31PM YO2MTG R-14
201800 -12 1545  Z31PM DJ3JD JO52
201800  -8 1807  Z31PM YO2MTG 73
201830 -16 1545  Z31PM DJ3JD JO52 (x2)
220000  +3 1496  Z31PM RK3QA LO02 (x2)
220045 -19 1243  RK3QA Z31PM RR73
220100  -2 1496  Z31PM RK3QA R-18

UTC    dB Audio  Message
215230 -15 2108  Z31PM SM7DXE R-08 (x5)
233645  -8 1017  Z31PM PI4DX R-11 (x2)
043800 -12  956  Z31PM F4DIA R-04
043830 -11 2088  Z31PM EC1A IN73 (x3)
190000 -10 2163  Z31PM PD1RGW JO31
215445  -2  896  D44TWO Z31PM -16
055315  -9 2451  OA4ENG Z31PM -14 (x2)

UTC    dB Audio  Message
191400  -4 2296  5Z4VJ Z31PM -16 (x2)
161100 -24 2022  EY8BL Z31PM -25 (x3)
161230 -10 2435  CQ Z31PM KN01 (x5)

UTC    dB Audio  Message
063415 -17 2243  Z31PM UA4FKT 73
155415 -11 1556  Z31PM RN6MA RR73
115315  -2 2688  Z31PM F1PBZ -07 (x3)
155045 -11 2380  Z31PM F1ODM -07 (x3)
060915 -15 1177  Z31PM SV5ADM R+00
132630 -16 2394  Z31PM CR7CDR IM58 (x3)
132800 -10  822  Z31PM CS7AWL IM58 (x3)

UTC    dB Audio  Message
185500 +12 2465  Z31PM M0PTZ 73
185530  +8  827  Z31PM G4BWQ R-08 (x4)
190430  -3 1933  Z31PM EA3CFV JN11 (x4)
190630  -9  879  Z31PM M7KBB IO90
190630  +0 1933  Z31PM EA3CFV R-18
190700 -11  879  Z31PM M7KBB IO90 (x3)
190900 -14 1938  Z31PM DH6AS JO31

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.