SP7SZJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP7SZJ, decoded by SO8OO in southeastern Poland. 2,541 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 60 UTC dates in the available aggregate history. Observed between 2026-07-05 and 2026-09-12.
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 2,541 FT8 messages attributed to SP7SZJ as the transmitting token by decoded message structure across 60 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (64%), followed by 80 m (33%) and 60 m (2%). Most decodes (68%) 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 (79%); the estimated median was -0.5 dB.
Overview
Bands
Last attributed message: 2026-09-12 19:14 UTC
Observed FT8 message patterns
- Attributed sample
- 2,541 messages
- Active dates
- 60 UTC dates
- Estimated median S/N
- -0.5 dB
- Estimated 10th-90th percentile
- -13.3 to +12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 176, moderate (-15 to -9 dB) 348, strong (≥ -8 dB) 2,017.
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 · 1,035 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 262 km (approx.)
- Last such locator decoded
- 2026-09-12 19:14 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 |
|---|---|---|---|---|---|---|
| 09-12 19:14 | 80m | - / +5 | LY2EW | -4 / - | 3 | Partial capture |
| 09-12 19:10 | 80m | -3 / -3 | SP5RZL | 0 / -1 | 4 | ✓ Full exchange observed |
| 09-12 19:08 | 80m | +7 / -4 | SQ8V | -12 / -5 | 4 | ✓ Full exchange observed |
| 09-12 18:44 | 80m | +12 / - | HA5CPN | - / - | 4 | ✓ Closing fragment |
| 09-12 18:37 | 80m | +4 / -12 | YU65AEC | -8 / +2 | 2 | Partial capture |
| 09-12 18:32 | 80m | +13 / - | DL/AD2LX | - / - | 5 | Partial capture |
| 09-12 18:30 | 80m | +15 / - | SP9CXN | +13 / -6 | 5 | ✓ Full exchange observed |
| 09-12 18:29 | 80m | +17 / -1 | OK1VKX | -2 / -6 | 4 | ✓ Full exchange observed |
| 09-12 18:26 | 80m | +8 / - | DL/AD2LX | - / -1 | 4 | Partial capture |
| 09-12 18:22 | 40m | -4 / -2 | II7IABB | -5 / - | 4 | Partial capture |
| 09-12 18:18 | 40m | -1 / -4 | II0IHMG | -6 / -7 | 3 | Partial capture |
| 09-12 16:52 | 40m | - / -4 | DL5JMN | -1 / - | 3 | ✓ Closing fragment |
| 09-12 16:46 | 40m | - / - | IU8DON | -12 / - | 2 | ✓ Closing fragment |
| 09-12 16:42 | 40m | - / +7 | SM0VKU | -6 / - | 2 | ✓ Closing fragment |
| 09-12 16:22 | 40m | 0 / - | II8IHBC | - / - | 5 | Partial capture |
| 09-12 16:19 | 40m | +2 / - | II0IHMG | - / -5 | 4 | Partial capture |
| 09-12 16:14 | 40m | +1 / - | SQ9PCO | - / -15 | 9 | Partial capture |
| 09-12 13:30 | 40m | +1 / - | SQ3EWA | - / -17 | 3 | ✓ Closing fragment |
| 09-12 12:55 | 40m | -11 / - | II9IAGM | - / -15 | 3 | Partial capture |
| 09-12 12:54 | 40m | -11 / - | DL4LUS | - / -7 | 2 | ✓ Closing fragment |
| 09-12 12:52 | 40m | -8 / - | PE1BTV | - / -16 | 2 | ✓ Closing fragment |
| 09-12 12:51 | 40m | -6 / -2 | PE1MHY | -12 / -7 | 4 | ✓ Full exchange observed |
| 09-12 12:46 | 40m | -11 / -1 | SQ100PKP | -6 / -1 | 4 | Partial capture |
| 09-12 12:43 | 40m | -10 / - | SP9BBA | - / -17 | 6 | ✓ Closing fragment |
| 09-12 12:41 | 40m | -5 / - | SP7VCL | -10 / +2 | 5 | ✓ Closing observed |
| 09-12 12:00 | 40m | -3 / +2 | SQ9AWN | -10 / 0 | 4 | ✓ Full exchange observed |
| 09-12 11:57 | 80m | -4 / -4 | DM8BJF | -7 / -20 | 4 | ✓ Full exchange observed |
| 09-11 20:03 | 80m | +12 / - | SQ8V | - / - | 2 | Partial capture |
| 09-11 20:02 | 80m | +10 / - | R3KLE | - / - | 2 | Partial capture |
| 09-11 20:01 | 80m | +6 / - | GW4HZA | - / -19 | 3 | ✓ Closing fragment |
| 09-11 19:58 | 80m | +8 / - | YU9MBA | - / - | 5 | Partial capture |
| 09-11 19:56 | 80m | +21 / +2 | DM8BJF | +8 / -3 | 5 | ✓ Full exchange observed |
| 09-11 19:55 | 80m | +14 / - | SQ2JDM | +9 / +1 | 4 | ✓ Full exchange observed |
| 09-11 19:52 | 40m | - / +2 | OE8DDX | +1 / - | 2 | ✓ Closing fragment |
| 09-11 19:44 | 40m | -12 / - | SP9AU | - / -12 | 4 | Partial capture |
| 09-11 19:41 | 40m | -13 / - | SP9AU | - / - | 2 | Partial capture |
| 09-11 19:40 | 40m | -20 / -4 | DG3TF | -6 / - | 3 | ✓ Closing observed |
| 09-11 19:39 | 40m | -10 / - | R3KLE | +1 / -6 | 3 | ✓ Closing observed |
| 09-11 19:35 | 40m | -7 / - | SM7OYP | +7 / -1 | 5 | ✓ Full exchange observed |
| 09-11 19:34 | 40m | -5 / -9 | TA1/TF1OL | -5 / -4 | 3 | Partial capture |
| 09-11 19:29 | 40m | -9 / - | HG0NPJ | +10 / - | 3 | ✓ Closing observed |
| 09-11 19:18 | 40m | - / -6 | PD1AQL | -10 / - | 2 | ✓ Closing fragment |
| 09-11 19:14 | 40m | -9 / +10 | DF9HT/P | -2 / -4 | 6 | ✓ Full exchange observed |
| 09-11 19:12 | 40m | +1 / - | LA/DM2RM | +12 / -2 | 4 | Partial capture |
| 09-11 19:10 | 40m | - / +2 | RN9N | -4 / - | 3 | ✓ Closing fragment |
| 09-11 19:09 | 40m | -3 / +9 | IA5ITY | +4 / 0 | 4 | ✓ Full exchange observed |
| 09-11 18:31 | 80m | +13 / -5 | IK2LFF | -5 / - | 7 | Partial capture |
| 09-11 18:29 | 80m | +16 / - | DO1ID | +4 / -7 | 3 | ✓ Closing observed |
| 09-11 18:28 | 80m | +14 / -5 | RO3ZR | -1 / -10 | 5 | ✓ Full exchange observed |
| 09-11 18:26 | 80m | +9 / -5 | R2EN | 0 / -6 | 4 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 184430 +18 1754 HA5CPN SP7SZJ JO91 (x3) 190830 +4 731 SQ8V SP7SZJ JO91 190845 -16 730 SP7SZJ SQ8V -04 190900 +10 731 SQ8V SP7SZJ R-05 190915 -8 730 SP7SZJ SQ8V RR73 191030 -3 1001 SP5RZL SP7SZJ JO91 191045 +3 1001 SP7SZJ SP5RZL -03 191100 -3 1001 SP5RZL SP7SZJ R-01 191215 -3 1001 SP7SZJ SP5RZL RR73 191400 +3 1001 CQ SP7SZJ JO91 191445 -7 1001 SP7SZJ LY2EW KO25 (x3)
UTC dB Audio Message 164300 -7 1038 SP7SZJ SM0VKU RR73 164600 -11 1904 SP7SZJ IU8DON RRR (x2) 165200 +1 2102 SP7SZJ DL5JMN JO60 165200 -12 990 SP7SZJ DL3BH JN48 165230 -1 2101 SP7SZJ DL5JMN R-04 (x2) 165430 -3 1226 SP7SZJ DF3JO JO31 181830 -6 1162 SP7SZJ II0IHMG -04 181945 +0 1226 II0IHMG SP7SZJ JO91 (x2) 182215 -7 1227 II7IABB SP7SZJ JO91 (x3) 182330 -5 1226 SP7SZJ II7IABB -02
UTC dB Audio Message 194445 -3 1552 BH8BMZ SP7SZJ -21 (x2) 175530 -6 1531 F5RMK SP7SZJ JO91 175545 -21 1531 SP7SZJ F5RMK -14 175600 -4 1531 F5RMK SP7SZJ R-11 175615 -21 1531 SP7SZJ F5RMK RR73 175630 -6 1531 F5RMK SP7SZJ 73 192430 -4 1343 OK1JPO SP7SZJ JO91 192445 -20 1343 SP7SZJ OK1JPO +06 192530 -5 1343 OK1JPO SP7SZJ 73 171715 -2 1460 SP8BJU SP7SZJ JO91 171730 +2 1555 SP7SZJ SP8BJU +01 171745 -4 1460 SP8BJU SP7SZJ R+03 171800 +6 1555 SP7SZJ SP8BJU RR73 171815 -3 1460 SP8BJU SP7SZJ 73
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)
UTC dB Audio Message 120445 -8 473 SP7SZJ DK7UY JO44 (x2) 100700 -18 1322 SP7SZJ DO5PY JN49 100700 -18 1434 SP7SZJ DK7UY R+05 (x2) 101800 -17 2390 SP7SZJ ON5RZ JO21 102330 +10 493 SP7SZJ IK4LZH JN54 (x5) 103030 -22 1386 SP7SZJ DO1TEM -11 (x2) 130600 -11 495 SP7SZJ F5SJC JN05 (x2)
UTC dB Audio Message 194600 -6 802 DO5HOK SP7SZJ -18 (x2) 194245 -13 1193 CQ SP7SZJ JO91 194300 -3 1796 SP7SZJ UA3ZUX KO90
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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