S57AM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S57AM, decoded by SO8OO in southeastern Poland. 1,715 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-11.
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 1,715 FT8 messages attributed to S57AM as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (32%), followed by 20 m (30%) and 40 m (23%). Several six-hour UTC windows tied for the largest share (94%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-10-11 19:52 UTC
Observed FT8 message patterns
- Attributed sample
- 1,715 messages
- Active dates
- 39 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -17 to +6.8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 229, moderate (-15 to -9 dB) 295, strong (≥ -8 dB) 1,191.
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 S57AM 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 S57AM
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
- JN66 · 1,002 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 755 km (approx.)
- Last such locator decoded
- 2026-10-11 19:52 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 | S57AM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-11 20:36 | 40m | - / - | DL1ECG | -18 / - | 2 | Partial capture |
| 10-11 20:28 | 40m | - / -13 | MW0DNF | -8 / - | 2 | Partial capture |
| 10-11 19:51 | 80m | +6 / - | OE3HPT | +10 / +8 | 5 | ✓ Full exchange observed |
| 10-11 19:49 | 80m | 0 / - | F4MWH | -9 / -5 | 5 | ✓ Full exchange observed |
| 10-11 19:47 | 80m | +6 / - | IK5ZTT | - / -2 | 3 | ✓ Closing fragment |
| 10-11 19:46 | 80m | +10 / -8 | R4FDD | -16 / -15 | 4 | ✓ Full exchange observed |
| 10-11 19:43 | 80m | +4 / - | RC9WC | - / -19 | 3 | Partial capture |
| 10-11 19:43 | 80m | - / - | R4FDD | -21 / - | 2 | Partial capture |
| 10-11 19:41 | 80m | +8 / - | JE2ERR | -7 / -22 | 3 | ✓ Closing observed |
| 10-11 19:39 | 80m | +8 / - | DF3TZ | +4 / +5 | 5 | ✓ Full exchange observed |
| 10-11 19:37 | 80m | +10 / - | RA1QCX | - / -11 | 3 | ✓ Closing fragment |
| 10-11 19:33 | 80m | +7 / +2 | OE5ABL | +3 / +10 | 5 | ✓ Full exchange observed |
| 10-11 19:33 | 80m | +9 / -2 | UR5EEW | +4 / +7 | 8 | ✓ Full exchange observed |
| 10-11 19:32 | 80m | +10 / - | DO1TEM | - / -16 | 2 | Partial capture |
| 10-11 19:28 | 80m | +10 / -13 | DO1MPN | +1 / -6 | 12 | ✓ Full exchange observed |
| 10-11 19:25 | 80m | +9 / +10 | DA6PI | -19 / +2 | 6 | ✓ Full exchange observed |
| 10-11 19:22 | 80m | +13 / -7 | SP2WRH | -7 / -8 | 5 | ✓ Full exchange observed |
| 10-11 19:20 | 80m | +11 / -17 | UA6EU | -10 / -10 | 5 | ✓ Full exchange observed |
| 10-11 19:17 | 80m | +12 / - | JG3TRB | - / -16 | 4 | Partial capture |
| 10-11 19:17 | 80m | - / - | SP5DFK/QRP | 0 / - | 2 | Partial capture |
| 10-11 19:13 | 80m | +10 / - | RN7B | - / -4 | 2 | ✓ Closing fragment |
| 10-11 19:13 | 80m | - / - | SP5DFK/QRP | -2 / - | 2 | Partial capture |
| 10-11 19:13 | 80m | - / - | SP4WJ | -5 / - | 12 | Partial capture |
| 10-11 19:11 | 80m | +10 / - | M8LOD | - / -9 | 3 | Partial capture |
| 10-11 19:08 | 80m | +12 / - | R7ZY | - / -6 | 2 | ✓ Closing fragment |
| 10-11 19:05 | 80m | +8 / - | F5LVR | - / -1 | 3 | ✓ Closing fragment |
| 10-11 18:18 | 160m | - / - | DF6DBF | -12 / - | 2 | Partial capture |
| 10-11 18:09 | 160m | - / - | DF6DBF | -15 / - | 11 | Partial capture |
| 10-11 18:02 | 160m | -2 / -4 | DM8KM | -4 / -13 | 5 | ✓ Full exchange observed |
| 10-11 17:57 | 160m | +2 / -8 | SQ8GBG | -4 / -2 | 6 | ✓ Full exchange observed |
| 10-11 17:57 | 160m | -4 / +1 | IU3RRX | -14 / +5 | 4 | ✓ Full exchange observed |
| 10-10 19:17 | 160m | +6 / - | SQ2BXI | -15 / -14 | 4 | Partial capture |
| 10-10 19:10 | 160m | +10 / -4 | PA3FR | +2 / +4 | 5 | ✓ Full exchange observed |
| 10-10 19:08 | 160m | +12 / -19 | RA6ATZ | -9 / -10 | 5 | ✓ Full exchange observed |
| 10-10 19:06 | 160m | - / - | RW3LS | -23 / - | 2 | Partial capture |
| 10-10 19:06 | 160m | +6 / -8 | HA7TM | +6 / +8 | 4 | ✓ Full exchange observed |
| 10-10 19:00 | 160m | +3 / -16 | EA4DS | -18 / -9 | 5 | ✓ Full exchange observed |
| 10-10 18:58 | 160m | +1 / -8 | LY8O | +4 / -4 | 5 | ✓ Full exchange observed |
| 10-10 18:57 | 160m | - / - | M0PNN | -10 / - | 7 | Partial capture |
| 10-10 18:57 | 160m | +3 / -6 | SP6JEV | -10 / -11 | 5 | ✓ Full exchange observed |
| 10-10 18:52 | 160m | +5 / - | OE4KQW | - / +6 | 3 | ✓ Closing fragment |
| 10-10 18:49 | 160m | +4 / - | IS0BQE | -20 / - | 4 | ✓ Closing observed |
| 10-10 18:48 | 160m | - / - | M0PNN | -8 / - | 2 | Partial capture |
| 10-10 18:48 | 160m | +3 / -4 | US5WDP | +6 / +3 | 5 | ✓ Full exchange observed |
| 10-10 18:48 | 160m | +3 / -1 | DL4FBN | -8 / -8 | 4 | ✓ Full exchange observed |
| 10-10 18:44 | 160m | +8 / +4 | DJ0FX | +11 / 0 | 5 | ✓ Full exchange observed |
| 10-10 18:07 | 40m | - / -19 | R2DDA | -2 / - | 2 | ✓ Closing fragment |
| 10-10 18:04 | 40m | - / -13 | PI4TS | -11 / - | 3 | ✓ Closing fragment |
| 10-09 18:51 | 40m | +5 / - | G3XKT | - / -6 | 2 | ✓ Closing fragment |
| 10-09 18:47 | 40m | +6 / -3 | ON1AJ | -11 / +1 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 185445 -18 1238 S57AM EB5FMC IM99 175315 -8 1653 CQ S57AM JN66 180400 -10 1653 S57AM PI4TS JO23 (x3) 180730 -1 2041 S57AM R2DDA -19 (x2) 181000 -9 1654 S57AM PE1JLZ JO22 202400 -14 1903 S57AM EA7L RR73 202830 -20 1823 S57AM MW9XET R+00 202830 -6 3000 S57AM MW0DNF -13 (x2) 203600 -19 1903 S57AM DL1ECG JO31 (x3)
UTC dB Audio Message 194815 +8 1811 IK5ZTT S57AM RR73 (x2) 194900 -8 1812 S57AM F4MWH +12 194915 -1 1810 F4MWH S57AM R-05 (x2) 195000 -10 1811 S57AM F4MWH RR73 195015 +1 1811 F4MWH S57AM 73 195045 +9 1812 CQ S57AM JN66 195100 +9 1811 S57AM OE3HPT JN77 195115 +7 1812 OE3HPT S57AM +08 195130 +9 1812 S57AM OE3HPT R+24 195145 +6 1812 OE3HPT S57AM RR73 195200 +11 1812 S57AM OE3HPT 73 195215 +10 1812 CQ S57AM JN66 (x2)
UTC dB Audio Message 180745 -1 1820 CQ S57AM JN66 180900 -1 2566 S57AM OZ2LIN JO46 180930 -15 1302 S57AM DF6DBF JO31 (x13)
UTC dB Audio Message 102045 -20 1948 M0KQV S57AM -02 102345 -19 1948 CQ S57AM JN66 102400 -13 1078 S57AM ON2RX JO20 181200 -18 1958 S57AM TA3OER KN30 (x2) 144800 -17 2025 S57AM TA2R KN41 (x2) 143600 -15 2293 S57AM D2ACE RR73
UTC dB Audio Message 173745 -9 1761 M7GOA S57AM RR73 184915 -16 1724 RI1FJL S57AM JN66 (x13) 064930 -8 739 S57AM LZ1OPM KN22
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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