SP9JZU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP9JZU, decoded by SO8OO in southeastern Poland. 1,104 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 46 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-17.
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 1,104 FT8 messages attributed to SP9JZU as the transmitting token by decoded message structure across 46 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 160 m (24%) and 60 m (15%). Most decodes (56%) fell within the six-hour window 01:00-07:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (88%); the estimated median was +9.9 dB.
Overview
Bands
Last attributed message: 2026-10-17 04:42 UTC
Observed FT8 message patterns
- Attributed sample
- 1,104 messages
- Active dates
- 46 UTC dates
- Estimated median S/N
- +9.9 dB
- Estimated 10th-90th percentile
- -11 to +19 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 54, moderate (-15 to -9 dB) 84, strong (≥ -8 dB) 966.
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 SP9JZU 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 SP9JZU
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
- JN99 · 669 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 206 km (approx.)
- Last such locator decoded
- 2026-10-17 04:42 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 | SP9JZU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-17 04:42 | 80m | +21 / - | K0KP | - / - | 2 | Partial capture |
| 10-17 04:40 | 80m | +12 / - | MI0NWA | - / - | 3 | ✓ Closing fragment |
| 10-17 04:38 | 80m | +14 / - | VP2MAW | - / -18 | 3 | Partial capture |
| 10-16 08:24 | 60m | -8 / - | F6BQX | - / +5 | 2 | ✓ Closing fragment |
| 10-16 08:12 | 60m | -8 / - | F6BQX | - / +5 | 8 | Partial capture |
| 10-16 06:58 | 60m | +1 / +2 | SP1ZMO | -2 / - | 5 | ✓ Full exchange observed |
| 10-16 06:57 | 60m | -3 / - | HB9SWR/P | - / +5 | 3 | ✓ Closing fragment |
| 10-16 06:54 | 60m | -3 / -14 | PA2PF | -14 / - | 4 | ✓ Full exchange observed |
| 10-16 06:53 | 60m | -2 / - | ES6DO | - / -2 | 2 | ✓ Closing fragment |
| 10-16 06:51 | 60m | -6 / -1 | DL9KM | -12 / +9 | 5 | ✓ Full exchange observed |
| 10-16 06:50 | 60m | -4 / -10 | PA3T | -12 / - | 6 | ✓ Full exchange observed |
| 10-16 06:44 | 60m | +4 / - | <...> | - / - | 2 | Partial capture |
| 10-16 05:14 | 60m | -9 / - | NP3RK | - / - | 6 | Partial capture |
| 10-16 05:05 | 60m | - / -1 | EA5D | -14 / - | 2 | ✓ Closing fragment |
| 10-15 15:51 | 160m | +1 / - | H49A | - / - | 3 | Partial capture |
| 10-15 15:28 | 160m | +4 / - | H49A | - / -24 | 7 | Partial capture |
| 10-15 15:24 | 160m | -5 / - | H49A | - / -24 | 4 | Partial capture |
| 10-15 15:03 | 160m | 0 / - | H49A | - / - | 3 | Partial capture |
| 10-15 14:44 | 160m | -1 / - | H49A | - / - | 7 | Partial capture |
| 10-14 14:41 | 60m | -7 / -3 | F8PKC | -19 / - | 4 | ✓ Full exchange observed |
| 10-14 07:18 | 60m | +2 / -4 | HB9DBM | -16 / - | 4 | Partial capture |
| 10-14 07:15 | 60m | +1 / -10 | DK2KGB | -14 / - | 5 | ✓ Full exchange observed |
| 10-14 07:12 | 60m | +3 / - | VE9TG | - / - | 4 | Partial capture |
| 10-14 07:11 | 60m | +3 / - | F4EFL | - / - | 3 | ✓ Closing fragment |
| 10-14 07:08 | 60m | -3 / - | VE9TG | - / - | 3 | Partial capture |
| 10-14 07:07 | 60m | -3 / - | F4JJS | - / +10 | 2 | ✓ Closing fragment |
| 10-14 07:05 | 60m | -4 / - | YO4BEW | -24 / -4 | 4 | ✓ Closing observed |
| 10-14 07:04 | 60m | -8 / - | F4JJS | - / - | 2 | Partial capture |
| 10-14 07:01 | 60m | -7 / - | DL6EBC | - / +3 | 6 | ✓ Closing fragment |
| 10-14 06:52 | 60m | -4 / - | EA1AUM | - / - | 12 | Partial capture |
| 10-14 06:49 | 60m | +3 / - | OH0KCE | - / -18 | 5 | ✓ Closing fragment |
| 10-14 05:44 | 60m | -4 / - | ZL2AGY | - / -18 | 6 | ✓ Closing fragment |
| 10-14 05:30 | 60m | -1 / - | YO2UKG | - / - | 3 | Partial capture |
| 10-14 05:28 | 60m | 0 / - | F4HSB | - / -6 | 3 | ✓ Closing fragment |
| 10-13 14:37 | 60m | -4 / - | SP3QDM | -3 / - | 5 | ✓ Full exchange observed |
| 10-13 14:36 | 60m | -6 / - | F8PKC | - / - | 2 | Partial capture |
| 10-13 14:19 | 60m | -7 / - | LA8ZIA | - / - | 3 | ✓ Closing fragment |
| 10-13 14:18 | 60m | -6 / +7 | DK8EW | -5 / - | 5 | ✓ Full exchange observed |
| 10-13 14:16 | 60m | -5 / - | HA1DAE | +6 / -5 | 5 | ✓ Full exchange observed |
| 10-13 14:13 | 60m | -4 / +3 | SP3IOE | +2 / - | 5 | ✓ Full exchange observed |
| 10-13 13:40 | 60m | -12 / - | DD2NU | - / - | 2 | Partial capture |
| 10-13 13:35 | 60m | -13 / - | DL9KM | - / - | 2 | Partial capture |
| 10-13 13:32 | 60m | -6 / 0 | SP1MWF | -14 / - | 5 | ✓ Full exchange observed |
| 10-13 12:58 | 60m | -12 / - | DL1GPS | - / - | 2 | Partial capture |
| 10-13 07:09 | 60m | -10 / - | <...> | - / - | 2 | Partial capture |
| 10-13 07:05 | 60m | -8 / - | IW1QBR | - / - | 2 | Partial capture |
| 10-13 07:03 | 60m | -6 / -10 | OK4TO | -2 / - | 5 | ✓ Full exchange observed |
| 10-13 07:00 | 60m | -7 / - | EA5FSJ | - / - | 2 | Partial capture |
| 10-13 06:59 | 60m | -7 / - | HB9HDK | - / - | 3 | ✓ Closing fragment |
| 10-13 06:58 | 60m | -10 / - | S51WB | - / -13 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 011915 +17 1146 SV1EAG SP9JZU R-05 011930 -17 2016 SP9JZU SV1EAG RR73 011945 +14 1146 SV1EAG SP9JZU 73 012015 +20 1146 OZ1A SP9JZU JN99 012030 -2 2304 SP9JZU OZ1A +16 012045 +17 1146 OZ1A SP9JZU R+00 (x2) 043845 +14 1027 VP2MAW SP9JZU JN99 (x3) 044045 +13 1143 MI0NWA SP9JZU JN99 (x3) 044215 +22 1143 K0KP SP9JZU JN99 (x2)
UTC dB Audio Message 065845 +1 2287 SP1ZMO SP9JZU JN99 065900 -3 2287 SP9JZU SP1ZMO +02 065915 +1 2287 SP1ZMO SP9JZU R+22 065930 -2 2287 SP9JZU SP1ZMO RR73 065945 +0 2287 SP1ZMO SP9JZU 73 081215 -7 2287 F6BQX SP9JZU JN99 (x10)
UTC dB Audio Message 150430 +2 2511 H49A SP9JZU JN99 (x15)
UTC dB Audio Message 184430 -15 1338 ZL1VAH SP9JZU 73 184545 -18 1338 JA0LFV SP9JZU JN99 184700 -22 1888 SP9JZU EA5KB +05 (x2) 184845 -18 1620 EX7DY SP9JZU JN99 184900 -19 1737 SP9JZU EX7DY +02 (x2) 185000 +5 2837 SP9JZU DL9PN JN39 (x3) 231100 -18 1813 SP9JZU AN5CV +23 (x2) 231145 -5 3025 AN5CV SP9JZU 73 231900 -16 2330 SP9JZU UA9CR RR73 232900 -21 1496 SP9JZU 9H6C -04
UTC dB Audio Message 165715 -2 2375 SP9JZU SV1CQN +15 120145 -13 630 SP9JZU <...> -05 151315 -7 2684 SP9JZU F1PBZ +00 (x4) 154830 -17 1595 SP9JZU SV5BYP RR73 163430 -16 1246 SP9JZU DN9TB R+22 123015 -13 2498 SP9JZU DK7UY -01 (x5) 121230 -14 1942 SP9JZU F4FSY +03 (x2)
UTC dB Audio Message 162500 -9 1764 SP9JZU EX7CQ -09 (x3) 071030 +3 1393 SP9JZU YO4NF -02 (x2) 164230 -9 2404 SP9JZU EP2AES -13 173300 -12 2275 SP9JZU BG7BMG -01 (x2) 173515 -16 1294 BA4II SP9JZU -07 173645 -16 1294 JQ2LVH SP9JZU -21 173800 +1 869 SP9JZU EX7DY -08 (x2) 174145 -22 1578 SP9JZU VR2VOG RR73 174545 -13 312 SP9JZU 4L7T -06 (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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