I5SFE — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving I5SFE, decoded by SO8OO in southeastern Poland. 85 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-07-09.
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 85 FT8 messages attributed to I5SFE as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (45%), followed by 20 m (34%) and 40 m (20%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-07-09 05:23 UTC
Observed FT8 message patterns
- Attributed sample
- 85 messages
- Active dates
- 11 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -23 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 31, strong (≥ -8 dB) 30.
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 I5SFE in decoded directed-looking exchanges:
Most frequent locator attributed to I5SFE
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
- JN53 · 38 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,089 km (approx.)
- Last such locator decoded
- 2026-07-09 05:23 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 UTC | Band | I5SFE S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-09 04:52 | 20m | - / +3 | RX3ASQ | -15 / - | 3 | ✓ Closing fragment |
| 07-09 04:31 | 20m | - / - | R6AC | -16 / - | 3 | Partial capture |
| 07-09 04:31 | 20m | - / -11 | TA3F | -23 / - | 3 | ✓ Closing fragment |
| 07-07 14:23 | 10m | - / -22 | UA4FKT | -14 / - | 2 | Partial capture |
| 07-05 12:23 | 10m | - / - | IW5BEF | +11 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 135700 -14 1387 CQ I5SFE JN53 (x4) 122315 +12 2502 I5SFE IW5BEF JN53 (x2) 142345 -14 1335 I5SFE UA4FKT R-22 (x2) 080915 -19 1093 I5SFE PD1UM JO30
UTC dB Audio Message 151945 -13 1255 I5SFE PD0IFI JO32 154415 -19 1855 I5SFE F4HSB 73 043115 -24 1616 I5SFE TA3F KM38 043115 -14 1807 I5SFE R6AC LN05 043145 -21 1616 I5SFE TA3F R-11 043145 -17 1807 I5SFE R6AC LN05 043215 -24 1616 I5SFE TA3F 73 043215 -16 1807 I5SFE R6AC LN05 043930 -11 2641 I5SFE RX9ABI MO05 045215 -15 1251 I5SFE RX3ASQ KO95 (x3) 045715 -20 2094 I5SFE UR5FS 73 045930 -17 2067 I5SFE RZ4FWA LO23 052330 -24 1441 CQ I5SFE JN53
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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