DO7TSM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DO7TSM, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 10m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-28.
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 16 FT8 messages attributed to DO7TSM as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 16 messages
- Active dates
- 1 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) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 12.
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 DO7TSM in decoded directed-looking exchanges:
Most frequent locator attributed to DO7TSM
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
- JO30 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,053 km (approx.)
- Last such locator decoded
- 2026-08-28 08:51 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 | DO7TSM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 09:04 | 10m | - / - | IU4PPL | -6 / - | 2 | Partial capture |
| 08-28 08:49 | 10m | - / +10 | IK4TVP | -12 / - | 5 | Partial capture |
| 08-28 08:43 | 10m | -6 / - | HG1DRC | - / - | 5 | Partial capture |
| 08-28 08:42 | 10m | -6 / - | VR2ZXP | - / - | 2 | Partial capture |
| 08-28 08:42 | 10m | - / - | DN9WES | -14 / - | 2 | Partial capture |
| 08-28 08:41 | 10m | -6 / - | EA4GA | - / -9 | 2 | ✓ Closing fragment |
| 08-28 08:36 | 10m | -4 / - | SQ5NAN | - / -18 | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 084415 -19 1970 DO7TSM F4BJN JN25 084430 -4 855 HG1DRC DO7TSM JO30 (x3) 084700 -11 1046 DO7TSM IU4PPL JN54 084930 -13 1691 DO7TSM IK4TVP +10 (x4) 085115 -13 801 ZA/IK3BNO DO7TSM JO30 085130 -13 1691 DO7TSM IK4TVP +10 085300 -6 557 DO7TSM Z34K RR73 090430 -7 618 DO7TSM IU4PPL JN54 (x2) 111145 -13 787 MI7XHT DO7TSM 73
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