ZC4RH — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

60 messages

Active dates

3 UTC dates

Estimated median S/N

-20 dB

Estimated 10th-90th percentile

-23 to -14 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 50, moderate (-15 to -9 dB) 10, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with ZC4RH 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 ZC4RH

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

KM64 · 2 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,944 km (approx.)

Last such locator decoded

2026-07-16 18:38 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
191900  +3 1588  ZC4RH GM4FDM RR73
191900  -6 1949  ZC4RH EA4DEI IN80
191930  -7 1099  ZC4RH RW4M LO44
191930  -4 1482  ZC4RH RA4LFN LO44
191930  -6 1268  ZC4RH RA4LAG LO44
191930  -9 1991  ZC4RH R1BNJ LO44
191930  +8 1588  ZC4RH GM4FDM RR73
191930  -7 1948  ZC4RH EA4DEI IN80
192100  -6 1100  ZC4RH RW4M LO44
192100  -6 1949  ZC4RH EA4DEI IN80
192130  -5 1100  ZC4RH RW4M LO44
192130 -14 1575  ZC4RH E74PA JN93
192200  +4 1655  ZC4RH RA4LFN LO44 (x3)

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.