I4UUL — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

145 messages

Active dates

13 UTC dates

Estimated median S/N

-5 dB

Estimated 10th-90th percentile

-13 to +2 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 39, strong (≥ -8 dB) 99.

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 I4UUL 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 I4UUL

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

JN54 · 91 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,013 km (approx.)

Last such locator decoded

2026-09-16 04:06 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
035700  -3  240  XE1IHD I4UUL JN54
035800  -8  240  6Y5HN I4UUL JN54 (x2)
040115  +0  240  OA4ENG I4UUL JN54
040600  -7 2894  CQ I4UUL JN54
040615  +0 2893  I4UUL KB3Z FN20
040630  -3 2894  KB3Z I4UUL -01
040645  -1 2893  I4UUL KB3Z FN20 (x4)
040830  +2 2894  KB3Z I4UUL -05
040845  +1 2893  I4UUL KB3Z R-03
040900  +4 2894  KB3Z I4UUL RR73
040915  +1 2893  I4UUL KB3Z 73

UTC    dB Audio  Message
031245 -11 1082  I4UUL VP2MAA -15
031300  -5 2722  VP2MAA I4UUL R-06
031315 -13 1082  I4UUL VP2MAA -15
031330 -10 2722  VP2MAA I4UUL R-09
032400  -8  262  CQ I4UUL JN54
032415  +5 2047  I4UUL R3EDI KO82
032430 -15  262  F4IIX I4UUL -02
032445  -5 2291  I4UUL F4IIX R-03
032500 -11  261  F4IIX I4UUL RR73
032530  -8  262  ON1JP I4UUL R-02
032615  +5  503  I4UUL G8OO JO02 (x5)

UTC    dB Audio  Message
051100 -24  467  I4UUL RI1FJL R-06

UTC    dB Audio  Message
131700  -6 2828  I4UUL IU4QRO 73

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.