MM8UDN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving MM8UDN, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-13.
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 6 FT8 messages attributed to MM8UDN as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 6 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -19 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.
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 MM8UDN in decoded directed-looking exchanges:
Most frequent locator attributed to MM8UDN
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
- IO75 · 4 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,894 km (approx.)
- Last such locator decoded
- 2026-07-13 20:56 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 | MM8UDN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-04 11:20 | 20m | - / -4 | EB3JT | -4 / - | 3 | ✓ Closing fragment |
| 07-13 20:49 | 20m | - / -14 | T77RN | -19 / - | 2 | ✓ Closing fragment |
| 07-13 20:41 | 20m | - / -12 | EA3EDU | -3 / - | 5 | Partial capture |
| 07-13 20:24 | 20m | - / -8 | T77RN | -18 / - | 2 | Partial capture |
| 07-13 20:06 | 20m | -18 / - | LY2TS | - / - | 3 | Partial capture |
| 07-13 19:53 | 20m | -21 / - | 9Y4C | - / -8 | 2 | Partial capture |
| 07-13 19:04 | 20m | - / -10 | TN8GD | -6 / - | 3 | ✓ Closing fragment |
| 07-13 12:01 | 20m | - / -22 | PE1PKI | -23 / - | 6 | Partial capture |
| 07-13 11:23 | 20m | - / -8 | CN2DX | -16 / - | 2 | ✓ Closing fragment |
| 07-13 10:54 | 20m | - / -16 | RZ3EM | -7 / - | 4 | Partial capture |
| 07-12 22:47 | 20m | - / -13 | 9K2YM | -12 / - | 2 | ✓ Closing fragment |
| 07-12 21:42 | 20m | - / -9 | UW5ESX | +1 / - | 3 | ✓ Closing fragment |
| 07-04 22:21 | 20m | - / -14 | CS8ABF | -11 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 200915 -19 926 LY2TS MM8UDN IO75 202400 -17 1352 MM8UDN T77RN -08 (x2) 204100 +0 1345 MM8UDN EA3EDU JN01 (x5) 204930 -20 1352 MM8UDN T77RN -14 (x3) 205600 -12 2441 DL5DQZ MM8UDN IO75 112030 -3 2136 MM8UDN EB3JT JN01 (x3)
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