F4MTM — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

177 messages

Active dates

21 UTC dates

Estimated median S/N

-16 dB

Estimated 10th-90th percentile

-23 to -1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 95, moderate (-15 to -9 dB) 40, strong (≥ -8 dB) 42.

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 F4MTM 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 F4MTM

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

IN97 · 52 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,687 km (approx.)

Last such locator decoded

2026-09-07 05:07 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
043030  +4  244  F4MTM RA6OY KN88 (x2)
043115 -15 1882  RA6OY F4MTM -06
043130  +4  244  F4MTM RA6OY KN88
043145 -17 1882  RA6OY F4MTM -08
043200  +8  244  F4MTM RA6OY R-20
043215 -21 1882  RA6OY F4MTM RR73
043230  +3  244  F4MTM RA6OY R-20 (x2)
043315 -23 1882  EB3JT F4MTM -16
043330  +4  244  F4MTM RA6OY R-20
043345 -24 1882  EB3JT F4MTM -16
050715 -15 1882  YN1ZGN F4MTM IN97 (x2)
061200 -17  297  J38DX F4MTM -15

UTC    dB Audio  Message
052215 -23 1908  JY5IB F4MTM -15
074000  -5 1877  F4MTM DK3TNA JO62 (x7)
071515  -2 1908  Z62NS F4MTM -02 (x7)

UTC    dB Audio  Message
092100  +0  815  F4MTM A71AT R-20 (x4)
071915 -24 1905  CQ F4MTM IN97
072115 -19 1905  UR5EPZ F4MTM -16 (x2)
072245 -17 1905  SP9UPH F4MTM RR73

UTC    dB Audio  Message
202030  -8 1757  F4MTM DL9KM JN68 (x4)

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.