DO4STL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO41

Receiver-side FT8 activity involving DO4STL, decoded by SO8OO in southeastern Poland. 186 FT8 messages attributed to this token as transmitter, on 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-08-23.

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 186 FT8 messages attributed to DO4STL as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Most decodes (91%) fell within the six-hour window 10:00-16:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

186
Messages attributed
9
UTC dates decoded
32
Active 15-min windows
-15 dB
Estimated median S/N

Bands

10m · 186
First attributed message: 2026-06-10
Last attributed message: 2026-08-23 12:45 UTC

Observed FT8 message patterns

Attributed sample
186 messages
Active dates
9 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-23 to -8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 90, moderate (-15 to -9 dB) 67, strong (≥ -8 dB) 29.

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 DO4STL 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 DO4STL

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
JO41 · 135 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
916 km (approx.)
Last such locator decoded
2026-08-23 12:45 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 UTCBandDO4STL S/NCounterpartCounterpart S/NMsgsCapture
07-25 09:41 10m - / +1 F1PBZ +3 / - 4 Partial capture
07-25 08:39 10m - / - F5ADE -21 / - 2 Partial capture
07-24 15:21 10m -13 / -23 DO1OAS -5 / -25 3 ✓ Full exchange observed
07-24 15:16 10m -10 / - RN6MA - / +3 2 ✓ Closing fragment
07-24 15:06 10m -19 / - M8JJS - / -1 2 Partial capture
07-24 14:49 10m -13 / - HB9HYO - / -21 9 Partial capture
07-24 14:38 10m - / - ON4JMV -1 / - 7 Partial capture
07-24 14:22 10m - / -3 F1PBZ +6 / - 3 Partial capture
07-24 14:22 10m -19 / -14 IW3BS -5 / - 4 ✓ Full exchange observed
07-24 12:09 10m - / - DK8EE -16 / - 2 Partial capture
07-23 09:20 10m - / -10 LZ3CB 0 / - 2 ✓ Closing fragment
07-21 10:39 10m - / -18 F4FSY -14 / - 2 ✓ Closing fragment
07-21 10:08 10m - / +2 IK4LZH +10 / - 3 ✓ Closing fragment
07-19 19:58 10m - / -19 EB3JT -16 / - 3 ✓ Closing fragment
07-19 10:26 10m - / - S51JY -14 / - 2 ✓ Closing fragment
07-19 10:19 10m -23 / - R7OV -20 / -15 7 Partial capture
06-30 11:46 10m -12 / - TA1DX - / -12 2 Partial capture
06-30 11:40 10m -9 / +1 F6ITD -12 / - 3 ✓ Closing observed
06-30 11:37 10m -13 / - F4BJN - / -3 2 Partial capture
06-30 11:31 10m -11 / - M0WOO - / -25 2 Partial capture
06-30 11:29 10m -8 / - EA2BHE - / -21 2 Partial capture
06-30 11:19 10m -11 / - EA2BHE - / -17 10 Partial capture
06-30 11:07 10m -6 / - EA8AT - / -15 2 Partial capture
06-30 10:31 10m - / - F4BJN -16 / - 2 Partial capture
06-29 21:38 10m - / -3 G0ANS -14 / - 2 ✓ Closing fragment
06-29 13:59 10m -18 / - SM4MNN - / -11 2 Partial capture
06-29 11:57 10m - / -11 TM2WWA +10 / - 5 Partial capture
06-29 11:42 10m - / -5 TM2WWA +16 / - 5 Partial capture
06-29 11:39 10m - / -7 TM2WWA +14 / - 2 Partial capture
06-29 11:36 10m - / -11 IK1MJK -16 / - 3 ✓ Closing fragment
06-27 22:33 10m - / -4 EA3AKY -9 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
155230 -19 1692  CQ DO4STL JO41 (x7)
083915 -21 1797  DO4STL F5ADE JN07 (x2)
094115  +4 2687  DO4STL F1PBZ +01 (x4)
162130 -24 1785  CQ DO4STL JO41 (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.

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