IU7GSJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN90

Receiver-side FT8 activity involving IU7GSJ, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-07-14.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 13 FT8 messages attributed to IU7GSJ as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.

Overview

13
Messages attributed
3
UTC dates decoded
5
Active 15-min windows
-6 dB
Estimated median S/N

Bands

20m · 13
First attributed message: 2026-07-09
Last attributed message: 2026-07-14 16:07 UTC

Observed FT8 message patterns

Attributed sample
13 messages
Active dates
3 UTC dates
Estimated median S/N
-6 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) 1, strong (≥ -8 dB) 8.

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 IU7GSJ in decoded directed-looking exchanges:

Most frequent locator attributed to IU7GSJ

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
JN90 · 4 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,072 km (approx.)
Last such locator decoded
2026-07-14 16:06 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.

Time UTCBandIU7GSJ S/NCounterpartCounterpart S/NMsgsCapture
07-14 15:54 20m - / - DF3IS +7 / - 3 ✓ Closing fragment
07-14 15:34 20m - / - OE9GWV +4 / - 5 Partial capture
07-13 18:56 20m - / -3 YO6LM -2 / - 2 Partial capture
07-13 18:50 20m - / - F4DUZ -15 / - 9 Partial capture
07-13 18:47 20m - / -9 RY7G +12 / - 3 ✓ Closing fragment
07-13 18:46 20m - / - YO4LUP -18 / - 2 Partial capture
07-13 18:41 20m - / -15 YO6LM -6 / - 3 Partial capture
07-13 18:37 20m - / - DL1UDO -9 / - 2 Partial capture
07-13 18:02 40m - / -16 UA6LIK -17 / - 3 Partial capture
07-13 17:53 40m - / -11 UA4FKT -3 / - 3 ✓ Closing fragment
07-10 04:16 40m - / -5 5B4AMM -8 / - 2 ✓ Closing fragment
07-10 04:06 40m - / - PC2J -8 / - 2 ✓ Closing fragment
07-10 03:53 40m - / - PC2J -6 / - 4 Partial capture
07-10 03:51 40m - / -4 YO4NF -4 / - 2 ✓ Closing fragment
07-10 03:43 40m - / - F5RRS -14 / - 3 Partial capture
07-10 03:42 40m - / - HB9EHP -12 / - 3 Partial capture
07-10 03:40 40m - / - 5B4AMM -8 / - 2 ✓ Closing fragment
07-10 03:40 40m - / - PC2J -4 / - 5 Partial capture
07-09 14:13 20m -2 / - PD1HPB -12 / -14 3 ✓ Closing observed
07-09 14:12 20m 0 / - PA0LDE - / -21 2 ✓ Closing fragment
07-09 14:03 20m - / - EB3JT -1 / - 2 Partial capture
07-09 13:56 20m - / -2 F1IQH -11 / - 3 ✓ Closing fragment
07-09 13:52 20m -17 / -12 PD3LKN -11 / -8 4 ✓ Full exchange observed
07-09 06:38 40m - / - UT4PA -12 / - 2 Partial capture
07-09 05:30 40m - / - YO3GNF -7 / - 3 Partial capture
07-09 05:28 40m - / - 9A4ZM -4 / - 3 Partial capture
07-09 05:20 40m - / - 9A4ZM -6 / - 2 Partial capture
07-09 05:18 40m - / -16 DL6UM -4 / - 3 Partial capture
07-09 05:08 40m - / - HA3GX -8 / - 2 Partial capture
07-09 05:06 40m - / - 9A4ZM -8 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

20m 
UTC    dB Audio  Message
185645  -2 2685  IU7GSJ YO6LM -03
185645 -22 1491  IU7GSJ F4DUZ JN19
153415  +2 2733  IU7GSJ OE9GWV JN47 (x5)
153945 -21 1192  IU7GSJ F/HB9VKL R+00
155415  +7 1141  IU7GSJ DF3IS JN49 (x3)
160400 -21 1141  YO4NF IU7GSJ 73
160630 -20 1142  CQ IU7GSJ JN90                        a1
160715 -12 1529  IU7GSJ RA9ACA -10
160730 -17 1141  DS2MGT IU7GSJ R-15
40m 
UTC    dB Audio  Message
040300 -18 2035  IU7GSJ UW5ESX KN67
040300  +6 2721  IU7GSJ IQ4JO JN63
040330 -21 1483  IU7GSJ E75D -08
040600  -7  494  IU7GSJ PC2J JO22 (x2)
041600  -6  302  IU7GSJ 5B4AMM -05 (x2)
041800  +2 2721  IU7GSJ IQ4JO JN63
175315  -3 2431  IU7GSJ UA4FKT LO23 (x3)
180215 -16 1712  IU7GSJ UA6LIK LN08 (x3)
182715 -17 2538  IU7GSJ PE1NPS JO22

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.

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