JA1GRM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JA1GRM, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-21 and 2026-08-25.
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 9 FT8 messages attributed to JA1GRM as the transmitting token by decoded message structure across 3 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 -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 9 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -10 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 3.
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 JA1GRM in decoded directed-looking exchanges:
Most frequent locator attributed to JA1GRM
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
- PM95 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,693 km (approx.)
- Last such locator decoded
- 2026-08-25 14:45 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 UTC | Band | JA1GRM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-26 17:07 | 40m | - / - | 9A4ZM | -1 / - | 3 | Partial capture |
| 08-25 14:43 | 20m | -8 / - | <...> | - / - | 5 | Partial capture |
| 08-21 15:36 | 20m | -18 / - | EX7CQ | - / - | 2 | ✓ Closing fragment |
| 08-21 14:37 | 10m | - / - | DO9YU | -8 / - | 2 | Partial capture |
| 08-07 14:36 | 20m | - / -15 | PD2NBE | -4 / - | 3 | Partial capture |
| 08-07 06:26 | 20m | - / -18 | R3UAX | -4 / - | 2 | Partial capture |
| 08-02 13:31 | 20m | - / - | PD1ADA | -14 / - | 5 | Partial capture |
| 07-15 16:56 | 20m | - / -18 | DK0ND | -16 / - | 2 | ✓ Closing fragment |
| 07-15 16:52 | 20m | - / -18 | DK0ND | -10 / - | 3 | Partial capture |
| 07-13 14:53 | 20m | - / - | DL5NCN | -5 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 170715 -2 1576 JA1GRM 9A4ZM JN86 (x3)
UTC dB Audio Message 143630 -3 2874 JA1GRM PD2NBE -15 (x3) 113245 -18 1871 JA1GRM UR4QWW KN77 153615 -17 1978 EX7CQ JA1GRM PM95 (x2) 153730 -4 1978 JA1GRM R4HNT LO43 151000 -16 2034 IU7DEK JA1GRM PM95 144330 -10 922 <...> JA1GRM PM95 (x5) 144545 +12 486 JA1GRM SV9/PD9VOG -14 144730 -15 253 BG7HFE JA1GRM -22
UTC dB Audio Message 143745 -10 2298 JA1GRM DO9YU 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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