NM4SH — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving NM4SH, decoded by SO8OO in southeastern Poland. 20 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-09-06.
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 20 FT8 messages attributed to NM4SH as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (90%), followed by 40 m (10%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (70%); the estimated median was -18 dB.
Overview
Bands
Last attributed message: 2026-09-06 23:10 UTC
Observed FT8 message patterns
- Attributed sample
- 20 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -18 dB
- Estimated 10th-90th percentile
- -20 to -14 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 6, 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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with NM4SH in decoded directed-looking exchanges:
Most frequent locator attributed to NM4SH
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
- FM17 · 10 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,470 km (approx.)
- Last such locator decoded
- 2026-08-27 01:22 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 | NM4SH S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-27 01:21 | 20m | -20 / - | RI1FJL | - / - | 2 | Partial capture |
| 08-26 22:53 | 20m | -16 / - | RI1FJL | - / - | 2 | Partial capture |
| 08-26 22:21 | 20m | -18 / - | RI1FJL | - / - | 3 | Partial capture |
| 08-23 22:19 | 20m | -16 / -9 | EC3A | -8 / +1 | 3 | ✓ Full exchange observed |
| 08-23 22:18 | 20m | -16 / -9 | IU3QWQ | -4 / -3 | 6 | ✓ Full exchange observed |
| 08-23 22:17 | 20m | -14 / - | A61OK | - / - | 2 | Partial capture |
| 07-30 02:08 | 40m | - / - | F5SJF | -16 / - | 3 | Partial capture |
| 06-27 01:36 | 40m | - / 0 | F6FHZ | -23 / - | 2 | Partial capture |
| 06-27 01:34 | 40m | - / -5 | SV2HTW | 0 / - | 2 | ✓ Closing fragment |
| 06-27 01:32 | 40m | - / -4 | SP6JIU | +14 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 013230 +15 2810 NM4SH SP6JIU -04 (x2) 013415 +0 664 NM4SH SV2HTW -05 (x2) 013645 -23 2124 NM4SH F6FHZ JN18 (x2) 020830 -17 2044 NM4SH F5SJF JN08 (x3) 231000 -19 2392 VJ6X NM4SH 73
UTC dB Audio Message 221845 -5 869 NM4SH IU3QWQ JN55 221900 -18 2421 IU3QWQ NM4SH -03 221915 -4 868 NM4SH IU3QWQ R-09 (x2) 221945 -8 587 NM4SH EC3A -09 222000 -15 2421 EC3A NM4SH R+01 (x2) 222115 -18 1200 RI1FJL NM4SH FM17 (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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