GM4ZMK — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving GM4ZMK, decoded by SO8OO in southeastern Poland. 215 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-07-05 and 2026-11-01.
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 215 FT8 messages attributed to GM4ZMK as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (93%), followed by 20 m (7%) and 40 m (1%). Most decodes (83%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-11-01 00:20 UTC
Observed FT8 message patterns
- Attributed sample
- 215 messages
- Active dates
- 23 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -14 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 99, strong (≥ -8 dB) 101.
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 GM4ZMK 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 GM4ZMK
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 · 160 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,894 km (approx.)
- Last such locator decoded
- 2026-11-01 00:15 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 | GM4ZMK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-01 00:18 | 60m | -10 / - | <...> | - / -10 | 3 | Partial capture |
| 11-01 00:10 | 60m | -8 / - | <...> | - / - | 9 | Partial capture |
| 11-01 00:08 | 60m | -6 / - | 6W/IK2HKT | - / - | 4 | Partial capture |
| 11-01 00:05 | 60m | -9 / - | 6W/IK2HKT | - / - | 3 | Partial capture |
| 10-31 19:29 | 60m | -13 / - | <...> | - / - | 9 | Partial capture |
| 10-31 19:21 | 60m | -11 / - | <...> | - / - | 2 | Partial capture |
| 10-30 19:17 | 60m | -14 / - | C5R | - / - | 2 | Partial capture |
| 10-30 19:13 | 60m | -12 / - | C5R | - / - | 2 | Partial capture |
| 10-29 15:40 | 60m | -10 / +7 | SM0EJR | -2 / - | 3 | Partial capture |
| 10-29 00:14 | 60m | -7 / - | S9R | - / - | 9 | Partial capture |
| 10-28 23:43 | 60m | -3 / -16 | IU8LMC | +3 / -4 | 10 | ✓ Full exchange observed |
| 10-28 22:58 | 60m | -10 / -14 | DC8SG | +7 / -2 | 5 | ✓ Full exchange observed |
| 10-27 23:49 | 60m | -10 / -16 | ON8SL | -18 / - | 5 | ✓ Closing observed |
| 10-27 23:48 | 60m | - / -3 | F1IQH | -2 / - | 3 | ✓ Closing fragment |
| 10-26 23:26 | 160m | - / - | 9A5E | -5 / - | 2 | Partial capture |
| 10-26 22:59 | 60m | -10 / - | EA4DM | - / -21 | 2 | Partial capture |
| 10-26 19:21 | 60m | -7 / - | C5R | - / -18 | 20 | Partial capture |
| 10-26 19:08 | 60m | -8 / - | C5R | - / - | 15 | Partial capture |
| 10-24 14:59 | 60m | - / - | DF4BR | -5 / - | 2 | Partial capture |
| 10-23 22:26 | 60m | -11 / -7 | EA7L | -7 / -11 | 5 | ✓ Full exchange observed |
| 10-23 22:26 | 60m | - / +5 | DL6RS | -10 / - | 3 | ✓ Closing fragment |
| 10-23 19:12 | 60m | -9 / - | SP7ROM | - / -21 | 2 | ✓ Closing fragment |
| 10-23 19:09 | 60m | -4 / - | SP6TID | - / -15 | 6 | ✓ Closing fragment |
| 10-23 19:08 | 60m | -7 / -9 | OE9RWH | -1 / -9 | 4 | ✓ Full exchange observed |
| 10-23 19:05 | 60m | -7 / - | ON6CQ | - / -20 | 2 | ✓ Closing fragment |
| 10-23 18:59 | 60m | -5 / - | LA6JEA | - / -20 | 4 | ✓ Closing fragment |
| 10-23 18:57 | 60m | +6 / - | SP9RA | - / -22 | 2 | ✓ Closing fragment |
| 10-23 18:55 | 60m | -4 / +8 | DL1UDO | -9 / +1 | 5 | ✓ Full exchange observed |
| 10-15 22:11 | 60m | -6 / -11 | I8OHQ | -8 / -19 | 3 | ✓ Full exchange observed |
| 10-15 22:03 | 60m | -7 / - | VP2MAW | - / - | 7 | Partial capture |
| 10-15 21:58 | 60m | -3 / - | VP2MAW | - / - | 5 | Partial capture |
| 10-15 21:52 | 60m | -3 / - | VP2MAW | - / - | 4 | Partial capture |
| 10-15 21:48 | 60m | -4 / - | VP2MAW | - / - | 3 | Partial capture |
| 10-12 22:52 | 60m | - / -15 | EA4D | -7 / - | 3 | ✓ Closing fragment |
| 10-12 18:36 | 60m | -11 / -6 | PE3T | +2 / - | 4 | ✓ Full exchange observed |
| 10-12 18:31 | 60m | - / - | YO5QDI | -11 / - | 6 | Partial capture |
| 10-12 18:24 | 60m | -14 / -10 | BD8ENU | -8 / -15 | 16 | ✓ Full exchange observed |
| 10-05 14:05 | 40m | - / - | F1IQH | -10 / - | 3 | ✓ Closing fragment |
| 10-02 22:49 | 60m | -10 / - | W1NG | - / - | 2 | ✓ Closing fragment |
| 10-02 19:29 | 60m | -10 / +2 | DD4U | +2 / +3 | 5 | ✓ Full exchange observed |
| 09-17 19:35 | 60m | - / -5 | S57MPU | +4 / - | 3 | ✓ Closing fragment |
| 09-17 19:33 | 60m | -16 / -17 | GX3RAF/P | -7 / - | 4 | ✓ Closing observed |
| 09-10 22:41 | 60m | +2 / - | WA1EXA | - / - | 3 | ✓ Closing fragment |
| 09-08 14:33 | 60m | - / - | DM9SD | -6 / - | 3 | Partial capture |
| 09-06 23:31 | 60m | -5 / -5 | PA4PA | +9 / - | 5 | ✓ Full exchange observed |
| 09-05 22:40 | 40m | -12 / - | D44TWO | - / - | 2 | Partial capture |
| 09-05 22:19 | 60m | -4 / +1 | VE1YX | -6 / -5 | 6 | ✓ Full exchange observed |
| 09-05 22:17 | 60m | -3 / - | D44TWO | - / -13 | 3 | ✓ Closing fragment |
| 08-30 17:13 | 20m | -5 / -25 | EA3ISA | -11 / - | 3 | Partial capture |
| 08-21 22:11 | 60m | -2 / - | VE1YX | -18 / -8 | 4 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 001015 -3 462 6W/IK2HKT GM4ZMK IO75 001045 -5 437 <...> GM4ZMK IO75 (x9) 001700 -10 638 GM4ZMK 6W/IK2HKT -18 001815 -8 437 <...> GM4ZMK R-10 (x3) 151830 -2 425 GM4ZMK F6DJL JN38
UTC dB Audio Message 232645 +1 2133 GM4ZMK 9A5E JN75 (x2)
UTC dB Audio Message 150000 -5 393 GM4ZMK C91RU -15 132130 -14 862 GM4ZMK TL8GD RR73
UTC dB Audio Message 224045 -12 2138 D44TWO GM4ZMK IO75 (x2) 140515 -10 528 GM4ZMK F1IQH JN27 (x3)
UTC dB Audio Message 171345 -5 2893 EA3ISA GM4ZMK IO75 171400 -10 2840 GM4ZMK EA3ISA -25 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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