DO9SX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO62

Receiver-side FT8 activity involving DO9SX, decoded by SO8OO in southeastern Poland. 154 FT8 messages attributed to this token as transmitter, on 80m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-02 and 2026-09-09.

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 154 FT8 messages attributed to DO9SX as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). Most decodes (82%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (78%); the estimated median was -5 dB.

Overview

154
Messages attributed
6
UTC dates decoded
19
Active 15-min windows
-5 dB
Estimated median S/N

Bands

80m · 154
First attributed message: 2026-09-02
Last attributed message: 2026-09-09 01:33 UTC

Observed FT8 message patterns

Attributed sample
154 messages
Active dates
6 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-11 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 28, strong (≥ -8 dB) 120.

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 DO9SX 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 DO9SX

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
JO62 · 87 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
675 km (approx.)
Last such locator decoded
2026-09-06 23:57 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 UTCBandDO9SX S/NCounterpartCounterpart S/NMsgsCapture
09-09 01:29 80m -12 / - VO1IV - / -25 8 Partial capture
09-07 00:04 80m +6 / - KB9MCM - / -17 15 ✓ Closing fragment
09-06 23:56 80m +1 / - R8PD - / -25 4 ✓ Closing fragment
09-06 23:53 80m -5 / - G8OO +2 / -2 7 ✓ Closing observed
09-06 23:50 80m +8 / +3 SO100PKP +11 / - 3 Partial capture
09-04 23:36 80m -4 / - RA9YTI - / - 10 Partial capture
09-04 23:24 80m -3 / - RA9YTI - / - 13 Partial capture
09-04 23:23 80m -2 / - CT7AUT - / +7 4 ✓ Closing fragment
09-04 23:19 80m -2 / -8 UX7QV +3 / - 5 ✓ Full exchange observed
09-04 23:16 80m -5 / -11 OH2MA +10 / - 4 ✓ Closing observed
09-04 23:06 80m -5 / +10 DF1BN -3 / - 5 ✓ Full exchange observed
09-04 23:04 80m - / -1 OK1HEH -4 / - 2 Partial capture
09-04 23:03 80m - / - DO6NC/P -11 / - 5 Partial capture
09-04 22:23 80m -1 / - RI1FJL - / -11 20 Partial capture
09-04 19:31 80m -5 / -17 ES7GN -6 / - 5 ✓ Full exchange observed
09-04 19:28 80m -8 / -13 OZ1GC +2 / - 4 ✓ Full exchange observed
09-03 20:38 80m -8 / - IK2VFR/P - / - 11 Partial capture
09-03 20:26 80m -10 / -23 RL2F -4 / - 4 ✓ Full exchange observed
09-03 18:33 80m - / -22 DL5DQZ -2 / - 2 ✓ Closing fragment
09-03 18:20 80m - / -14 OZ7CL -2 / - 2 ✓ Closing fragment
09-03 01:07 80m -2 / - AA1K - / -12 2 Partial capture
09-03 01:05 80m - / -7 F5RMK -4 / - 2 ✓ Closing fragment
09-03 00:59 80m -14 / - RI1FJL - / -7 3 Partial capture
09-02 19:29 80m -5 / -11 HB0WR -22 / -7 2 Partial capture
09-02 19:25 80m -13 / - HB0WR - / - 3 Partial capture
09-02 19:24 80m -16 / - MW7GQB - / - 2 Partial capture
09-02 19:16 80m - / -8 RA2FU -8 / - 2 Partial capture
09-02 18:11 80m -6 / - RI1FJL - / - 25 Partial capture
09-02 18:10 80m -11 / - LA2JKA - / - 2 Partial capture
09-02 18:08 80m - / -10 SP7OK +2 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
000800  +2  349  KB9MCM DO9SX -17 (x7)
012915 -16 1104  VO1IV DO9SX -25 (x8)

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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