GW4HZA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving GW4HZA, decoded by SO8OO in southeastern Poland. 1,231 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 41 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-13.
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 1,231 FT8 messages attributed to GW4HZA as the transmitting token by decoded message structure across 41 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (46%), followed by 40 m (24%) and 60 m (20%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -6 dB.
Overview
Bands
Last attributed message: 2026-09-13 00:05 UTC
Observed FT8 message patterns
- Attributed sample
- 1,231 messages
- Active dates
- 41 UTC dates
- Estimated median S/N
- -6 dB
- Estimated 10th-90th percentile
- -13 to -0.5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 62, moderate (-15 to -9 dB) 312, strong (≥ -8 dB) 857.
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 GW4HZA 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 GW4HZA
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
- IO81 · 685 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,746 km (approx.)
- Last such locator decoded
- 2026-09-12 23:58 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 | GW4HZA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-12 23:59 | 80m | -3 / - | N1ECP | -24 / -15 | 17 | Partial capture |
| 09-12 23:55 | 80m | -14 / -7 | UR1CCT | +11 / +2 | 5 | ✓ Full exchange observed |
| 09-12 23:50 | 80m | - / -10 | KC1SQ | -22 / - | 2 | ✓ Closing fragment |
| 09-12 23:45 | 80m | -2 / -8 | 7X5CY | -16 / +2 | 7 | ✓ Full exchange observed |
| 09-11 21:10 | 80m | - / - | IZ6BZQ | -2 / - | 2 | Partial capture |
| 09-11 21:07 | 80m | - / - | EW4DX | -8 / - | 2 | Partial capture |
| 09-11 21:05 | 80m | -8 / - | DH3UN | +1 / +1 | 4 | ✓ Full exchange observed |
| 09-11 21:05 | 80m | -13 / -14 | OE9RWH | -4 / - | 3 | ✓ Closing observed |
| 09-11 21:01 | 80m | -12 / -22 | R2GFN | +6 / -11 | 4 | ✓ Full exchange observed |
| 09-11 20:58 | 80m | -10 / -22 | HF5A | +7 / -15 | 5 | ✓ Full exchange observed |
| 09-11 20:55 | 80m | -9 / - | SP1BSJ | +7 / -4 | 3 | Partial capture |
| 09-11 20:51 | 80m | - / -15 | ON4MAP | -19 / - | 3 | ✓ Closing fragment |
| 09-11 20:39 | 80m | - / -13 | DL2TOS | -4 / - | 3 | ✓ Closing fragment |
| 09-11 20:36 | 80m | - / - | SP9HAB | +14 / - | 4 | Partial capture |
| 09-11 20:30 | 80m | - / - | SP5DFK | +2 / - | 2 | Partial capture |
| 09-11 20:26 | 80m | -8 / - | M8FQT | -6 / +2 | 3 | ✓ Closing observed |
| 09-11 20:20 | 80m | -8 / -17 | DG2EBG | 0 / - | 6 | ✓ Closing observed |
| 09-11 20:16 | 80m | - / -3 | OH2BGD | 0 / - | 3 | ✓ Closing fragment |
| 09-11 20:09 | 80m | - / -21 | R2EC | +8 / - | 3 | ✓ Closing fragment |
| 09-11 20:03 | 80m | - / +3 | DM1EE | -6 / - | 3 | ✓ Closing fragment |
| 09-11 20:01 | 80m | - / -19 | SP7SZJ | +6 / - | 3 | ✓ Closing fragment |
| 09-11 19:58 | 80m | - / -15 | IZ1NGW | -12 / - | 2 | Partial capture |
| 09-11 19:56 | 80m | - / -18 | YL3CW | -2 / - | 2 | ✓ Closing fragment |
| 09-11 19:52 | 80m | -13 / - | F4HUN | -24 / -4 | 4 | ✓ Closing observed |
| 09-11 19:47 | 80m | -12 / - | RU3ACA | - / -9 | 7 | Partial capture |
| 09-11 19:43 | 80m | -15 / -17 | RU3ACA | -1 / -9 | 4 | ✓ Full exchange observed |
| 09-11 19:29 | 80m | - / +5 | DK8ZT | +3 / - | 3 | ✓ Closing fragment |
| 09-11 19:24 | 80m | - / -16 | OH4KRN | +5 / - | 4 | ✓ Closing fragment |
| 09-11 19:23 | 80m | - / -13 | DK1MBY | -8 / - | 3 | ✓ Closing fragment |
| 09-11 19:22 | 80m | -13 / +5 | OH5D | +7 / - | 4 | ✓ Closing observed |
| 09-11 19:20 | 80m | -10 / -12 | DL2MED | +6 / -4 | 5 | ✓ Full exchange observed |
| 09-11 19:15 | 80m | -10 / +2 | DD8BA | -6 / -4 | 5 | ✓ Full exchange observed |
| 09-11 19:12 | 80m | -7 / -2 | F3KT | -10 / +8 | 4 | ✓ Full exchange observed |
| 09-11 19:11 | 80m | -12 / -25 | R8CEG | -20 / - | 4 | ✓ Closing observed |
| 09-11 19:10 | 80m | -4 / -11 | EA7GTJ | -20 / -9 | 5 | ✓ Full exchange observed |
| 09-11 19:07 | 80m | -5 / -3 | EA3DNC | -24 / -6 | 3 | ✓ Full exchange observed |
| 09-11 19:07 | 80m | -19 / - | IW9GSH | -14 / -18 | 5 | Partial capture |
| 09-11 19:04 | 80m | -14 / - | PC4N | - / -21 | 3 | Partial capture |
| 09-11 19:01 | 80m | -24 / 0 | OZ1DKT | -2 / -15 | 4 | ✓ Full exchange observed |
| 09-11 19:00 | 80m | -22 / +5 | OZ0A | +7 / 0 | 5 | ✓ Full exchange observed |
| 09-11 18:57 | 80m | -18 / -11 | SP3BVI | +13 / -9 | 8 | ✓ Full exchange observed |
| 09-11 18:56 | 80m | -19 / -16 | R4FV | +1 / - | 4 | ✓ Closing observed |
| 09-11 18:39 | 80m | -10 / -20 | R2SDZ | -1 / - | 4 | ✓ Closing observed |
| 09-11 18:38 | 80m | -15 / -24 | DO1HEL | -10 / -13 | 21 | Partial capture |
| 09-11 18:37 | 80m | -13 / -16 | DO7FJK | -10 / -11 | 6 | Partial capture |
| 09-11 18:28 | 80m | - / -16 | DO2XB | +5 / - | 4 | ✓ Closing fragment |
| 09-11 18:24 | 80m | - / - | DO9PV | -6 / - | 2 | Partial capture |
| 09-11 18:24 | 80m | - / -21 | RC2DD | +9 / - | 8 | Partial capture |
| 09-11 18:24 | 80m | - / - | UT7UA | +14 / - | 3 | Partial capture |
| 09-11 18:19 | 80m | - / -4 | SP2SGZ | +8 / - | 5 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 235930 -24 468 GW4HZA N1ECP FN54 235945 -2 468 N1ECP GW4HZA -15 000000 -24 468 GW4HZA N1ECP FN54 000015 -6 468 N1ECP GW4HZA -15 (x12)
UTC dB Audio Message 055000 -14 203 GW4HZA SM0BRF RRR (x2) 062845 -9 1096 GW4HZA SQ2NUH -09 (x10) 063800 -21 1631 GW4HZA HB9ACA -03 (x3)
UTC dB Audio Message 171900 -10 1618 GW4HZA CT1BFP R-08 172245 +3 498 SP8ADU GW4HZA -01 (x3) 172815 -1 497 CQ GW4HZA IO81 (x7) 065300 -17 486 GW4HZA R4FDD 73 065730 +4 485 GW4HZA R7OV R-03 (x2) 072730 -24 1712 GW4HZA SV1EKI KM18
UTC dB Audio Message 203315 +6 2896 GW4HZA DM2HW 73 (x5) 055930 -16 244 CQ GW4HZA IO81 055945 -5 547 GW4HZA IW2DNI JN45 060100 -18 244 W9COS GW4HZA -15 (x2) 060300 -16 244 CQ GW4HZA IO81 a1 (x3) 060730 -16 244 N4MMR GW4HZA -12 (x3)
UTC dB Audio Message 085245 -10 1699 GW4HZA G0FWX RR73 095930 +4 751 GW4HZA F5NIB JN06 (x12)
UTC dB Audio Message 223645 +7 1571 GW4HZA SP6LUV JO90 (x4)
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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