G4SFS — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving G4SFS, decoded by SO8OO in southeastern Poland. 44 FT8 messages attributed to this token as transmitter, on 60m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-15.
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 44 FT8 messages attributed to G4SFS as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (93%), followed by 20 m (7%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-09-15 19:44 UTC
Observed FT8 message patterns
- Attributed sample
- 44 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -13 to -7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 17.
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 G4SFS 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 G4SFS
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
- IO81 · 17 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,746 km (approx.)
- Last such locator decoded
- 2026-09-15 19:44 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 | G4SFS S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 08:53 | 40m | - / - | PD1AC | -14 / - | 6 | Partial capture |
| 09-15 19:42 | 60m | -11 / -9 | TF1A | -20 / 0 | 7 | ✓ Full exchange observed |
| 09-10 09:07 | 40m | - / - | F5RRS | -10 / - | 3 | Partial capture |
| 09-08 19:15 | 60m | - / +1 | DL1SRS | -1 / - | 3 | ✓ Closing fragment |
| 09-08 19:15 | 60m | - / 0 | IK4CBO | -2 / - | 3 | ✓ Closing fragment |
| 09-08 19:12 | 60m | -12 / -8 | ER3UA | +4 / - | 2 | Partial capture |
| 08-25 19:33 | 60m | -12 / - | F4CYH | - / +10 | 2 | ✓ Closing fragment |
| 08-25 18:26 | 60m | - / - | SQ9LOJ | -5 / - | 3 | Partial capture |
| 08-25 18:24 | 60m | - / -13 | IK0BAL | -16 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 090715 -9 702 G4SFS F5RRS JN36 (x3) 085345 -16 784 G4SFS PD1AC JO22 (x6)
UTC dB Audio Message 191215 -12 730 ER3UA G4SFS IO81 191400 +4 2435 G4SFS ER3UA -08 191500 +2 1688 G4SFS IK4CBO JN54 191500 -3 730 G4SFS DL1SRS JN49 191530 -2 1688 G4SFS IK4CBO R+00 (x2) 191700 +2 730 G4SFS DL1SRS R+01 (x2) 194245 -10 828 TF1A G4SFS IO81 (x4) 194430 -18 1277 G4SFS TF1A -09 194445 -12 828 TF1A G4SFS R+00 194500 -21 1277 G4SFS TF1A RR73
UTC dB Audio Message 124815 -8 1037 G4SFS S55A -14
UTC dB Audio Message 065845 -16 851 Z62NS G4SFS IO81 070045 -7 851 XE2V G4SFS IO81
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee