SP7SZJ — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving SP7SZJ, decoded by SO8OO in southeastern Poland. 3,883 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 98 UTC dates in the available aggregate history. Observed between 2026-07-05 and 2026-11-03.
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 3,883 FT8 messages attributed to SP7SZJ as the transmitting token by decoded message structure across 98 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 80 m (44%) and 60 m (1%). Most decodes (60%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (82%); the estimated median was 0 dB.
Overview
Bands
Last attributed message: 2026-11-03 05:23 UTC
Observed FT8 message patterns
- Attributed sample
- 3,883 messages
- Active dates
- 98 UTC dates
- Estimated median S/N
- 0 dB
- Estimated 10th-90th percentile
- -12.9 to +11 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 231, moderate (-15 to -9 dB) 468, strong (≥ -8 dB) 3,184.
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 SP7SZJ 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 SP7SZJ
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
- JO91 · 1,771 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 262 km (approx.)
- Last such locator decoded
- 2026-11-03 05:23 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 | SP7SZJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 05:17 | 40m | - / +1 | LZ2PAJ | +2 / - | 2 | ✓ Closing fragment |
| 11-05 05:15 | 40m | - / +4 | F4MTU | -2 / - | 2 | Partial capture |
| 11-05 05:07 | 40m | - / - | ON3MOH/P | -6 / - | 2 | ✓ Closing fragment |
| 11-05 05:01 | 40m | - / +5 | YO9IAB | -2 / - | 2 | ✓ Closing fragment |
| 11-05 04:56 | 40m | - / -7 | F3CJ | -14 / - | 3 | ✓ Closing fragment |
| 11-04 19:44 | 40m | - / +8 | DL6NA | -22 / - | 2 | Partial capture |
| 11-04 19:41 | 40m | - / +7 | PB1PCH | -7 / - | 2 | ✓ Closing fragment |
| 11-04 19:30 | 40m | - / +4 | F1UNR | -10 / - | 2 | Partial capture |
| 11-04 19:29 | 40m | - / +10 | OE6RAD | +5 / - | 2 | ✓ Closing fragment |
| 11-04 19:24 | 40m | - / +9 | OE3OOG | -12 / - | 2 | ✓ Closing fragment |
| 11-03 05:46 | 40m | - / +1 | SV2HXV | -18 / - | 2 | ✓ Closing fragment |
| 11-03 05:44 | 40m | - / -7 | DL3RAJ | +2 / - | 7 | ✓ Closing fragment |
| 11-03 05:44 | 40m | - / +1 | GJ0KYZ | -13 / - | 2 | ✓ Closing fragment |
| 11-03 05:39 | 40m | - / -6 | TC2TR | -14 / - | 2 | ✓ Closing fragment |
| 11-03 05:21 | 80m | +8 / - | 5B4AMM | - / - | 5 | Partial capture |
| 11-02 16:44 | 40m | - / -7 | TC7ATA | -14 / - | 2 | ✓ Closing fragment |
| 11-02 16:25 | 40m | - / -14 | G7RCQ | -10 / - | 3 | ✓ Closing fragment |
| 11-02 16:22 | 40m | - / -3 | RJ3DC | -8 / - | 3 | ✓ Closing fragment |
| 11-02 06:34 | 40m | -3 / -5 | YO2CR | -2 / -1 | 4 | ✓ Full exchange observed |
| 11-02 06:32 | 40m | 0 / - | F1UFX | -19 / -3 | 3 | ✓ Closing observed |
| 11-02 06:30 | 40m | - / -2 | UT3KW | -10 / - | 2 | ✓ Closing fragment |
| 11-02 06:26 | 40m | - / -5 | YO8XFU | -7 / - | 3 | ✓ Closing fragment |
| 11-02 05:23 | 40m | - / -4 | IW2ODG | -1 / - | 3 | ✓ Closing fragment |
| 11-02 05:18 | 40m | - / -9 | TC2TR | -18 / - | 2 | ✓ Closing fragment |
| 11-01 18:24 | 40m | - / -3 | IK1NPP | -20 / - | 2 | ✓ Closing fragment |
| 11-01 16:22 | 40m | - / - | DA1TE | -6 / - | 2 | Partial capture |
| 11-01 16:10 | 40m | - / +1 | DC4CP | +5 / - | 2 | ✓ Closing fragment |
| 11-01 15:52 | 40m | - / - | DC4CP | +9 / - | 5 | Partial capture |
| 11-01 15:30 | 40m | - / - | PD0JEW | -5 / - | 3 | Partial capture |
| 11-01 15:12 | 40m | - / 0 | M0BEW | -14 / - | 2 | ✓ Closing fragment |
| 11-01 15:09 | 40m | - / -14 | PA2AMJ | -17 / - | 2 | ✓ Closing fragment |
| 10-31 19:39 | 40m | - / - | EA1EYL | -11 / - | 4 | Partial capture |
| 10-31 19:31 | 40m | - / -7 | M0BEW | -4 / - | 3 | Partial capture |
| 10-31 19:23 | 40m | - / -12 | UB6HVA | -4 / - | 2 | Partial capture |
| 10-31 19:07 | 80m | -7 / -8 | UN0GY | -14 / -16 | 5 | ✓ Full exchange observed |
| 10-31 18:46 | 80m | +4 / -1 | DL6FDY | -6 / -10 | 6 | ✓ Full exchange observed |
| 10-31 18:45 | 80m | +8 / -2 | DK0RMR | +8 / -16 | 4 | ✓ Full exchange observed |
| 10-31 18:43 | 80m | - / - | SP4WJ | -4 / - | 4 | Partial capture |
| 10-31 18:40 | 80m | +8 / -5 | DO7RMS | +11 / - | 4 | ✓ Closing observed |
| 10-31 18:40 | 80m | +7 / +4 | RK4FF | -3 / -12 | 4 | ✓ Full exchange observed |
| 10-31 18:39 | 160m | - / - | UX7QV | -9 / - | 6 | Partial capture |
| 10-31 18:39 | 80m | +2 / - | UA3GJM | - / -6 | 2 | ✓ Closing fragment |
| 10-31 18:37 | 80m | - / - | SP4WJ | -7 / - | 6 | Partial capture |
| 10-31 18:36 | 80m | -4 / -4 | SQ8JLF | -2 / -7 | 7 | ✓ Full exchange observed |
| 10-31 18:36 | 80m | -3 / - | SP5DFK/QRP | - / -6 | 2 | Partial capture |
| 10-31 18:34 | 80m | +5 / - | YU65AEC | - / - | 3 | Partial capture |
| 10-31 18:23 | 60m | - / -3 | SV1EKI | -3 / - | 5 | ✓ Closing fragment |
| 10-31 17:21 | 80m | +10 / +3 | SP5JMA | +9 / +1 | 6 | ✓ Full exchange observed |
| 10-31 17:20 | 80m | +11 / - | OK2UPG | +22 / +1 | 6 | ✓ Full exchange observed |
| 10-31 17:20 | 80m | - / +4 | YU65AEC | +7 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 194415 -20 2210 SP7SZJ DL6NA JN49 (x2) 194615 +15 2908 SP7SZJ HB9DKG RR73 045215 -15 868 SP7SZJ 3A2LF RR73 045645 -16 233 SP7SZJ F3CJ JO10 (x3) 050115 -3 800 SP7SZJ YO9IAB +05 (x2) 050715 -12 2233 SP7SZJ ON3MOH/P +16 (x2) 051545 -2 2768 SP7SZJ F4MTU +04 (x2) 051715 +2 1093 SP7SZJ LZ2PAJ +01 (x2)
UTC dB Audio Message 184730 +1 1821 DL6FDY SP7SZJ R-10 184745 -11 1603 SP7SZJ DL6FDY RR73 184800 +0 1821 DL6FDY SP7SZJ 73 184915 -9 1820 SP7SZJ EA1BWU IN73 190730 -6 1820 UN0GY SP7SZJ JO91 190745 -15 2456 SP7SZJ UN0GY -08 190800 -1 1820 UN0GY SP7SZJ R-16 190815 -13 2456 SP7SZJ UN0GY RR73 190830 -14 1820 UN0GY SP7SZJ 73 171300 +0 1637 UA9XL/P SP7SZJ JO91 052115 +3 1760 5B4AMM SP7SZJ JO91 (x5)
UTC dB Audio Message 183915 -5 1780 SP7SZJ UX7QV KN29 (x6)
UTC dB Audio Message 035300 +0 1684 SP7SZJ EA3NE RR73 035330 -9 1185 SP7SZJ EB3JT JN01 (x3) 040230 -20 1760 SP7SZJ SV8NAJ RR73 040500 -19 1345 SP7SZJ ON1JP -05 (x2) 040600 +0 2539 SP7SZJ F5OWT JN18 (x2) 182215 -18 1942 SP7SZJ 9A60CBM -12 182345 -2 2766 SP7SZJ SV1EKI KM18 (x5)
UTC dB Audio Message 130700 -8 496 SP7SZJ F5SJC 73 145300 -13 1804 SP7SZJ EA5JKM -01 145300 -15 1596 SP7SZJ CS7BPG IN51 145330 -20 1925 SP7SZJ EA5JKM -01 145330 -16 1596 SP7SZJ CS7BPG R+02 145400 -19 1923 SP7SZJ EA5JKM -01 145400 -15 1596 SP7SZJ CS7BPG 73 150030 -12 1685 SP7SZJ EA5IIE -14 (x4) 152015 -11 870 SP7SZJ EA4AA R-21 (x2) 143330 +12 2334 SP7SZJ CN8WK -02 (x2)
UTC dB Audio Message 145130 -7 800 SP7SZJ M1AYZ IO94 151930 +16 1421 SP7SZJ F4PCM JN23 (x3) 145445 +4 1945 SP7SZJ RA9LL -15 (x2) 160300 +2 1785 SP7SZJ EA3FYO -16 160400 -13 1562 SP7SZJ F4MUN IN95 (x3) 160700 -8 1561 SP7SZJ F4ACR IN96 (x5)
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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