SP4GDW — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP4GDW, decoded by SO8OO in southeastern Poland. 1,652 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 67 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-14.
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 1,652 FT8 messages attributed to SP4GDW as the transmitting token by decoded message structure across 67 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (93%), followed by 20 m (7%). Most decodes (77%) fell within the six-hour window 07:00-13:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-10-14 09:00 UTC
Observed FT8 message patterns
- Attributed sample
- 1,652 messages
- Active dates
- 67 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -21 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 680, moderate (-15 to -9 dB) 660, strong (≥ -8 dB) 312.
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 SP4GDW 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 SP4GDW
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
- JO93 · 735 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 440 km (approx.)
- Last such locator decoded
- 2026-10-14 08:55 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 | SP4GDW S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-14 09:53 | 40m | - / - | F5JVT | -18 / - | 3 | Partial capture |
| 10-14 09:45 | 40m | - / - | F5JVT | -24 / - | 4 | Partial capture |
| 10-14 08:59 | 40m | -17 / - | SQ9OUG | -10 / - | 4 | ✓ Closing observed |
| 10-14 08:51 | 40m | - / - | US1MM | -19 / - | 2 | Partial capture |
| 10-14 07:57 | 40m | - / - | SQ5CZJ | -14 / - | 7 | Partial capture |
| 10-14 07:53 | 40m | - / -18 | SP5ROM | -15 / - | 3 | Partial capture |
| 10-14 07:46 | 40m | -22 / - | SQ5TOM | -18 / - | 2 | ✓ Closing observed |
| 10-14 07:45 | 40m | -20 / - | SP9IML | - / -13 | 2 | ✓ Closing fragment |
| 10-14 07:43 | 40m | -18 / -4 | SP6TKK | -10 / - | 3 | ✓ Closing observed |
| 10-14 07:36 | 40m | - / +7 | HF5W | -5 / - | 2 | ✓ Closing fragment |
| 10-14 07:36 | 40m | -14 / -4 | SP7PGK | -16 / -13 | 3 | ✓ Full exchange observed |
| 10-13 09:22 | 40m | -19 / +5 | HA1BF | -6 / -8 | 5 | ✓ Full exchange observed |
| 10-13 09:19 | 40m | -20 / - | SP7AAO | - / -9 | 5 | ✓ Closing fragment |
| 10-13 09:17 | 40m | -19 / - | SP4BB | - / - | 3 | Partial capture |
| 10-13 09:15 | 40m | -21 / 0 | SP9WTC | -18 / -8 | 4 | ✓ Full exchange observed |
| 10-13 09:14 | 40m | -23 / -14 | DL8TT | -15 / -8 | 3 | ✓ Full exchange observed |
| 10-11 18:26 | 40m | - / -12 | PA3GAE | -12 / - | 2 | ✓ Closing fragment |
| 10-11 18:23 | 40m | - / -7 | RA3XFR | -8 / - | 2 | ✓ Closing fragment |
| 10-11 10:44 | 40m | - / -5 | EO210WLP | -8 / - | 2 | Partial capture |
| 10-11 10:44 | 40m | -16 / -17 | DD3ZZ | -8 / -8 | 7 | ✓ Full exchange observed |
| 10-11 10:42 | 40m | -16 / - | SP2IHI | - / - | 2 | Partial capture |
| 10-11 10:40 | 40m | -20 / - | PD2MAC/P | - / -8 | 2 | Partial capture |
| 10-11 10:38 | 40m | -18 / - | DL9PN | -12 / -5 | 3 | ✓ Closing observed |
| 10-11 10:36 | 40m | -15 / - | RN3PD | - / - | 2 | ✓ Closing fragment |
| 10-11 10:33 | 40m | -18 / - | M8NAQ | - / -17 | 3 | ✓ Closing fragment |
| 10-11 10:31 | 40m | -21 / +10 | SP8KNF | -6 / -3 | 6 | ✓ Full exchange observed |
| 10-11 10:27 | 40m | -18 / -17 | SP6TPP | -19 / -14 | 5 | ✓ Full exchange observed |
| 10-11 10:25 | 40m | -14 / - | SN0EG | - / -10 | 3 | ✓ Closing fragment |
| 10-11 10:24 | 40m | -14 / - | G1DWG | - / -10 | 2 | Partial capture |
| 10-10 09:46 | 40m | -17 / - | IK0XBU/P | - / - | 2 | Partial capture |
| 10-10 09:44 | 40m | -12 / - | SN5MV | -11 / -12 | 3 | ✓ Full exchange observed |
| 10-10 09:42 | 40m | - / -10 | SP5SJL | -8 / - | 3 | ✓ Closing fragment |
| 10-10 09:40 | 40m | -11 / - | SQ2JYJ | - / -10 | 4 | Partial capture |
| 10-10 09:39 | 40m | - / - | SQ6EMJ | -19 / - | 2 | ✓ Closing fragment |
| 10-10 09:33 | 40m | -10 / - | SP6AXW | - / - | 2 | Partial capture |
| 10-10 09:33 | 40m | - / - | SQ8KMP | +8 / - | 2 | Partial capture |
| 10-10 09:29 | 40m | -22 / - | SP3MYP | - / - | 2 | ✓ Closing fragment |
| 10-10 09:26 | 40m | - / - | F5JVT | -22 / - | 3 | Partial capture |
| 10-10 09:24 | 40m | -23 / +3 | SP8RWI | -10 / - | 5 | ✓ Closing observed |
| 10-10 09:24 | 40m | -23 / -8 | SP9FVO | -15 / -9 | 6 | Partial capture |
| 10-10 09:24 | 40m | - / +9 | SP9IML | -18 / - | 8 | ✓ Closing fragment |
| 10-10 09:20 | 40m | -15 / - | SQ6WA | -6 / -5 | 4 | ✓ Full exchange observed |
| 10-10 09:18 | 40m | - / - | F5JVT | -20 / - | 7 | Partial capture |
| 10-10 09:15 | 40m | -19 / - | HA5WZ | - / -9 | 10 | Partial capture |
| 10-09 21:30 | 40m | - / -14 | DD3ZZ | -4 / - | 2 | Partial capture |
| 10-09 21:25 | 60m | - / - | OM1AGE | -4 / - | 5 | Partial capture |
| 10-09 12:33 | 40m | -14 / - | OH1TEV | -8 / -13 | 7 | ✓ Closing observed |
| 10-09 12:33 | 40m | -17 / - | SP1IWC | -9 / -9 | 7 | ✓ Full exchange observed |
| 10-09 12:31 | 40m | -18 / -4 | SQ2ODE | -5 / -1 | 4 | ✓ Full exchange observed |
| 10-09 12:29 | 40m | -16 / - | PD0PHA | - / -13 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 085515 -18 2082 CQ SP4GDW JO93 085600 -16 2083 SP4GDW US1MM 73 085900 -10 597 SP4GDW SQ9OUG JN99 (x2) 090015 -17 2082 SQ9OUG SP4GDW RR73 090030 -11 595 SP4GDW SQ9OUG 73 091430 -20 2083 SP4GDW SO5A KO02 094530 -24 1575 SP4GDW F5JVT JN18 (x7) 165845 -3 1547 SP4GDW EU1KI -10
UTC dB Audio Message 212515 -2 2668 SP4GDW OM1AGE JN88 (x5)
UTC dB Audio Message 155245 -11 1564 SP4GDW EA3CY 73 103545 +8 387 SP4GDW F4MRJ/P +00 (x2) 103815 +8 1198 SP4GDW R2BDR -08 (x2) 115615 -10 1366 SP4GDW DK1TBL R-16 (x5) 063745 +9 1216 SP4GDW R3PJ KO84 (x3) 131615 -7 1213 SP4GDW RA9CUU -11 (x2)
UTC dB Audio Message 095115 -11 2584 SP4GDW IQ4JO JN63 095115 -17 1807 SP4GDW F4FSY +01 095115 -10 2439 SP4GDW F1ODM -01 095645 -11 2583 SP4GDW IQ4JO R-04 (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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