IU8VJU — reception at SO8OO

Observed FT8 message patterns

Attributed sample

169 messages

Active dates

19 UTC dates

Estimated median S/N

-12 dB

Estimated 10th-90th percentile

-19 to -6 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 33, moderate (-15 to -9 dB) 103, strong (≥ -8 dB) 33.

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 IU8VJU 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 IU8VJU

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

JM78 · 81 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,381 km (approx.)

Last such locator decoded

2026-09-08 02:58 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
190900  -5 1034  IU8VJU II7MGML -01
191000  -8 1860  IU8VJU SV1DKR KM18
191015  -9 1420  <...> IU8VJU JM78
191100  -9 1420  IU8VJU <...> +01
191500 -12 1606  II7MGXX IU8VJU JM78
083730 -17 2272  IU8VJU 4O7CC RR73
024130 -24 1341  FY4UM IU8VJU JM78
025600 -21 1216  5N0YEN IU8VJU JM78 (x6)
145500 -14 1154  IU8VJU IQ2AAH -15 (x2)

UTC    dB Audio  Message
190330  -7  857  IU8VJU RR73; IZ5CMG <...> +06
215830  +8 1237  IU8VJU II7MGXX -11
215900 +10 1237  IU8VJU RR73; F1TXI <...> -18
202345  -2 1003  IU8VJU II7MGBA -14
184330 -24 1221  II7MGXX IU8VJU JM78
191930 -20  434  3B9FR IU8VJU JM78 (x3)
201345  -1 1223  IU8VJU II7MGXX -01
201445  +5 2035  IU8VJU 9A4ZM JN86 (x3)
190600  +3 1058  IU8VJU II7MGBT -03
190615 -12 1057  II7MGBT IU8VJU R-02
200245  -4 1702  IU8VJU IR7MGGC +02

UTC    dB Audio  Message
192045 -13 1378  YO4NT IU8VJU RR73
192100  +1 2583  IU8VJU OM1AGE JN88
192115 -12 1378  YO4NT IU8VJU RR73
192130  +2 2583  IU8VJU OM1AGE JN88
192145 -12 1378  YO4NT IU8VJU 73
192200  -3 2583  IU8VJU OM1AGE JN88 (x3)
185030 -14 1142  OH0KCE IU8VJU JM78 (x7)

UTC    dB Audio  Message
152630 -17 1112  EA6AQG IU8VJU JM78 (x3)
153045 -18 1837  C31US IU8VJU JM78 (x3)
194615 -17 1928  LX1RFJ IU8VJU JM78 (x2)
195215 -15  876  TA2ANK IU8VJU JM78 (x4)
201115  -5  585  RI1FJL IU8VJU JM78

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.