IU3RTD — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

6 messages

Active dates

2 UTC dates

Estimated median S/N

-19 dB

S/N percentile sample

Too small

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 2, 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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with IU3RTD in decoded directed-looking exchanges:

Most frequent locator attributed to IU3RTD

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

JN55 · 4 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

945 km (approx.)

Last such locator decoded

2026-09-02 07:34 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
072630  -4 2078  IU3RTD DL9KM JN68 (x2)
072700  +1 2741  IU3RTD DH7WW/P JO60
072730  -2 2078  IU3RTD DL9KM JN68
072730 -15 1906  IU3RTD DK7ZT +10
072730  -1 2741  IU3RTD DH7WW/P -08
072800 -12 1906  IU3RTD DK7ZT +10 (x2)
073315 -14  893  CQ IU3RTD JN55                        a1 (x2)
073445 -13  893  IU3RTD ON4KEB JO20
073500  -8 1194  IU3RTD OK1HEH -21
073515 -11  893  IU3RTD ON4KEB JO20
073530 -10 1195  IU3RTD OK1HEH -21
073630 -15 1906  IU3RTD DK7ZT +10

UTC    dB Audio  Message
093245  -6 2801  IU3RTD EA2DYB IN83
095315 -23 2112  IU3RTD PD2ARI JO22 (x2)
141300  -5 2276  IU3RTD F5HNQ IN98 (x3)
143030  -9  437  IU3RTD PD1CBH R-24
145400  +0  816  IU3RTD GJ0KYZ +04 (x2)
153815  -6 1208  IU3RTD CR7BUJ -15 (x3)
161745  -6 1202  IU3RTD TA3F (x3)

UTC    dB Audio  Message
140130 -19 2022  IU3RTD YO9PH -15 (x2)
141700  -1 1487  IU3RTD LZ4VR KN13 (x2)
141830 -15 2020  IU3RTD YO9PH -16
142830  -6 1488  IU3RTD LZ4VR KN13 (x3)
144630 -12 2023  IU3RTD YO9PH -18
145330  +4 2142  IU3RTD LZ3CB KN32 (x3)
145430 -17 1955  IU3RTD IK7YZB JN80
145600  +6 2143  IU3RTD LZ3CB KN32 (x2)

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.