GM4YMI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving GM4YMI, decoded by SO8OO in southeastern Poland. 38 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-25 and 2026-09-04.
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 38 FT8 messages attributed to GM4YMI 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 (92%), followed by 40 m (8%). Several six-hour UTC windows tied for the largest share (61%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (61%); the estimated median was -17 dB.
Overview
Bands
Last attributed message: 2026-09-04 05:26 UTC
Observed FT8 message patterns
- Attributed sample
- 38 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -24 to -9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 12, 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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with GM4YMI 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 GM4YMI
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
- IO86 · 21 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,792 km (approx.)
- Last such locator decoded
- 2026-09-04 05:26 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 | GM4YMI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-10 07:57 | 40m | - / -26 | F1HFP | -18 / - | 8 | ✓ Closing fragment |
| 09-10 07:35 | 40m | - / -14 | DK4FH | +2 / - | 4 | ✓ Closing fragment |
| 09-10 07:30 | 40m | - / -15 | DH5BM | -6 / - | 2 | Partial capture |
| 09-09 07:27 | 40m | - / -9 | GJ0KYZ | -9 / - | 2 | ✓ Closing fragment |
| 09-08 20:52 | 40m | - / -15 | IZ0ZIP | -5 / - | 2 | Partial capture |
| 09-08 20:49 | 40m | - / -15 | F1PBZ | -4 / - | 2 | ✓ Closing fragment |
| 09-05 04:36 | 40m | - / -12 | IW1GB | -7 / - | 3 | ✓ Closing fragment |
| 09-04 05:51 | 40m | - / -23 | F5RRS | -8 / - | 3 | ✓ Closing fragment |
| 09-04 05:43 | 40m | - / -6 | F4IFO | -4 / - | 2 | ✓ Closing fragment |
| 09-04 05:39 | 40m | - / -11 | PA3EVY | -4 / - | 2 | ✓ Closing fragment |
| 09-04 05:37 | 40m | - / -25 | DK5UR | +4 / - | 2 | ✓ Closing fragment |
| 09-04 05:25 | 40m | -22 / -24 | S58MU | +8 / - | 6 | ✓ Closing observed |
| 09-04 05:24 | 40m | - / -20 | WF2A | -10 / - | 2 | ✓ Closing fragment |
| 09-04 05:22 | 40m | - / -10 | DJ0MAB | -2 / - | 3 | ✓ Closing fragment |
| 09-04 05:18 | 40m | - / -15 | OZ4MK | -9 / - | 6 | ✓ Closing fragment |
| 09-02 19:50 | 40m | - / -16 | HB9EDG | -6 / - | 5 | Partial capture |
| 09-02 15:51 | 40m | - / -15 | PD2MAC | -12 / - | 2 | Partial capture |
| 09-02 15:34 | 40m | - / - | DK8HC | -8 / - | 4 | Partial capture |
| 09-02 03:51 | 40m | - / -18 | IT9VCE | +3 / - | 2 | ✓ Closing fragment |
| 09-01 19:31 | 40m | - / - | M0PEL | -4 / - | 3 | ✓ Closing fragment |
| 09-01 19:17 | 40m | - / - | G6MTI | -10 / - | 2 | Partial capture |
| 08-31 06:36 | 40m | - / -13 | DF2KD | -17 / - | 3 | ✓ Closing fragment |
| 08-31 06:32 | 40m | - / -7 | DD2MON | -15 / - | 3 | ✓ Closing fragment |
| 08-31 06:32 | 40m | - / - | ON8MA | -20 / - | 2 | Partial capture |
| 08-31 06:27 | 40m | - / -11 | F5MXH | -14 / - | 4 | ✓ Closing fragment |
| 08-31 06:25 | 40m | - / - | ON8MA | -4 / - | 2 | Partial capture |
| 08-31 06:17 | 40m | - / -13 | PA3CPS | -9 / - | 3 | ✓ Closing fragment |
| 08-30 18:52 | 40m | - / -5 | PD1AC | -4 / - | 2 | ✓ Closing fragment |
| 08-30 18:50 | 40m | - / - | DL1EDR | +3 / - | 3 | Partial capture |
| 08-29 13:18 | 40m | - / -13 | DF0AWG | +5 / - | 16 | Partial capture |
| 08-28 20:48 | 20m | - / - | EB3JT | -2 / - | 2 | ✓ Closing fragment |
| 08-28 11:59 | 20m | - / -8 | PD0PMF | +6 / - | 2 | ✓ Closing fragment |
| 08-28 11:46 | 20m | - / -11 | HB10GBT | -15 / - | 2 | Partial capture |
| 08-28 10:10 | 20m | - / -4 | IU2THY | +18 / - | 3 | ✓ Closing fragment |
| 08-28 10:08 | 20m | - / - | DL1UDO | -7 / - | 3 | Partial capture |
| 08-28 08:19 | 20m | - / - | F4BYA | +2 / - | 4 | Partial capture |
| 08-28 08:08 | 20m | - / -16 | F5MOO | +8 / - | 2 | ✓ Closing fragment |
| 08-28 08:04 | 20m | - / -19 | DL3FH | +6 / - | 3 | Partial capture |
| 08-28 07:58 | 20m | - / 0 | F5SJC | -5 / - | 3 | ✓ Closing fragment |
| 08-28 07:57 | 20m | - / - | F5PBG | -10 / - | 2 | Partial capture |
| 08-28 07:45 | 20m | - / -6 | SP2GK | -15 / - | 2 | Partial capture |
| 08-28 06:49 | 20m | - / -11 | F6DZU | +2 / - | 2 | ✓ Closing fragment |
| 08-27 21:10 | 20m | -13 / -11 | EA4GA | -2 / - | 4 | Partial capture |
| 08-27 20:36 | 20m | - / -12 | IU1DXU | -4 / - | 3 | ✓ Closing fragment |
| 08-27 20:24 | 20m | - / -21 | EA3HKD | -9 / - | 5 | ✓ Closing fragment |
| 08-27 20:21 | 20m | - / -18 | DF1OLS | +6 / - | 2 | ✓ Closing fragment |
| 08-27 19:50 | 20m | -19 / - | R2BRU | - / -18 | 2 | Partial capture |
| 08-27 19:49 | 20m | -24 / - | RA0ZIH | - / -15 | 2 | Partial capture |
| 08-27 19:18 | 20m | - / -23 | CN8NS | 0 / - | 3 | Partial capture |
| 08-27 12:14 | 20m | - / -15 | DK6WH | -10 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 072445 -8 388 GM4YMI OZ1JMJ -03 073015 -6 1433 GM4YMI DH5BM JO41 (x2) 073545 +4 982 GM4YMI DK4FH JO64 (x4) 075745 -18 1774 GM4YMI F1HFP JN28 (x8)
UTC dB Audio Message 100830 -3 1385 GM4YMI F5IXN JN23 100830 -7 2053 GM4YMI DL1UDO JO31 100900 +0 1385 GM4YMI F4PCM R-03 100930 -7 2053 GM4YMI DL1UDO JO31 101000 +17 566 GM4YMI IU2THY JN45 (x3) 114600 -16 1713 GM4YMI HB10GBT -11 (x2) 115900 +8 539 GM4YMI PD0PMF -08 (x2) 131000 +5 623 GM4YMI LA6RJA RR73 131215 -23 1712 CQ GM4YMI IO86 204845 -1 1771 GM4YMI EB3JT JN01 (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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