IU0TZZ — reception at SO8OO

Observed FT8 message patterns

Attributed sample

167 messages

Active dates

26 UTC dates

Estimated median S/N

-10 dB

Estimated 10th-90th percentile

-16 to -4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 71, strong (≥ -8 dB) 71.

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 IU0TZZ 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 IU0TZZ

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

JN61 · 106 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,158 km (approx.)

Last such locator decoded

2026-10-09 20:21 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
194730  +6 1035  IU0TZZ IN3IBW -09 (x2)
194830  +4 1035  IU0TZZ RR73; PE1FBC <...> -12
211530  -2 2197  IU0TZZ DL7PIA -12 (x2)
211800 -13 2054  IU0TZZ DL9ATW JO61 (x2)
213100 -13 1638  IU0TZZ DH2LM -25 (x2)
213145 -14 1642  DH2LM IU0TZZ R-13
213300 -17 1638  IU0TZZ DH2LM RR73 (x2)
213415 -20 1641  DH2LM IU0TZZ R-14
213430 -18 1638  IU0TZZ DH2LM RR73
213445 -14 1641  DH2LM IU0TZZ 73

UTC    dB Audio  Message
073530 -17  880  IU0TZZ II0IHMG -06 (x2)
152845 -19 1274  <II9IAGM> IU0TZZ JN61
152900 -15 1272  IU0TZZ II9IAGM +09
152915 -20 1275  II9IAGM IU0TZZ R+13
192430  -9 2150  HF100PKP IU0TZZ JN61
192445  -3 2146  IU0TZZ II4IANT -13
192500 -13 2150  HF100PKP IU0TZZ R-15
192700 -10 2150  II4IANT IU0TZZ JN61 (x2)
070900  -8  750  IU0TZZ II0IHMG -03
112800  -9 1425  IU0TZZ SN100PKP -13 (x3)
202145  -7 1072  DL7PIA IU0TZZ JN61

UTC    dB Audio  Message
201430  -5  640  IU0TZZ II9IAGM +03
201445  -8  641  II9IAGM IU0TZZ R+02
201530  -8  580  IU0TZZ G3UHU IO80 (x3)
201645  -5  641  G3UHU IU0TZZ -16
201700 -14  580  IU0TZZ G3UHU R-20
201715  -6  641  G3UHU IU0TZZ RR73
201730  -7  580  IU0TZZ G3UHU R-20
220200  -9  996  OH6FSO IU0TZZ JN61 (x3)
202345  -5  592  II9IAGM IU0TZZ JN61
202430 -10 1065  IU0TZZ <...> -09
202445  -4 1066  <...> IU0TZZ R-15

UTC    dB Audio  Message
212030 +10 1073  IU0TZZ SQ100PKP -24
212715 -19 1075  HB0/HB9FXF IU0TZZ JN61
212730  +9  880  IU0TZZ SQ100PKP -18

UTC    dB Audio  Message
223200  +7  637  IU0TZZ YO4NF -09 (x2)
212200 -16 1070  <...> IU0TZZ JN61

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.