SP4H — 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 SP4H, decoded by SO8OO in southeastern Poland. 89 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-05 and 2026-10-23.
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 89 FT8 messages attributed to SP4H as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (83%), followed by 80 m (15%) and 20 m (2%). Several six-hour UTC windows tied for the largest share (85%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -5 dB.
Overview
Bands
Last attributed message: 2026-10-23 17:53 UTC
Observed FT8 message patterns
- Attributed sample
- 89 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -13 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 62.
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 SP4H 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 SP4H
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
- KO13 · 37 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 405 km (approx.)
- Last such locator decoded
- 2026-10-23 17:53 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 | SP4H S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-23 17:53 | 80m | -6 / - | SQ5NO | - / - | 2 | Partial capture |
| 10-16 16:31 | 40m | - / -15 | JG3TRB | -16 / - | 2 | ✓ Closing fragment |
| 10-16 15:54 | 40m | - / - | DL1NRC | -7 / - | 8 | Partial capture |
| 10-16 15:53 | 40m | - / +4 | UZ5ZU | -10 / - | 4 | Partial capture |
| 10-16 15:53 | 40m | - / - | RX3VF | -14 / - | 2 | Partial capture |
| 10-16 15:49 | 40m | - / -7 | OD5ZF | -5 / - | 3 | ✓ Closing fragment |
| 09-29 17:55 | 80m | +9 / +5 | SP4NKJ | -7 / -11 | 5 | ✓ Full exchange observed |
| 09-29 17:40 | 80m | +8 / - | DO9SAM | +15 / -16 | 3 | ✓ Closing observed |
| 09-29 17:39 | 80m | +6 / - | SP5KG | +6 / -2 | 5 | ✓ Full exchange observed |
| 09-29 17:30 | 80m | +6 / -8 | HF40BLP | +15 / -3 | 3 | Partial capture |
| 09-29 17:14 | 80m | - / - | OZ1HPS | -9 / - | 3 | Partial capture |
| 09-29 17:01 | 80m | - / - | OH3MB | -8 / - | 2 | ✓ Closing fragment |
| 09-27 10:59 | 40m | -6 / - | SP9BBA | - / -20 | 3 | ✓ Closing fragment |
| 09-27 10:57 | 40m | +1 / -6 | SQ3TR | 0 / -2 | 5 | ✓ Full exchange observed |
| 09-27 10:23 | 40m | -10 / +6 | SP9BEB | -6 / -1 | 5 | ✓ Full exchange observed |
| 09-27 10:22 | 40m | -10 / +3 | SQ4GXF | -18 / - | 2 | Partial capture |
| 09-27 09:59 | 40m | -12 / - | HF100PKP | - / -16 | 2 | Partial capture |
| 09-27 09:57 | 40m | 0 / - | SQ9CXH | -4 / -1 | 7 | ✓ Full exchange observed |
| 09-27 09:56 | 40m | +4 / -12 | HF40BLP | -1 / -1 | 5 | ✓ Full exchange observed |
| 09-27 09:55 | 40m | -7 / - | SQ7KHW | -17 / -8 | 4 | ✓ Closing observed |
| 09-27 09:53 | 40m | -9 / - | SQ9AWN | -4 / -4 | 5 | ✓ Full exchange observed |
| 09-27 09:51 | 40m | +2 / +4 | SO3UOU/M | -10 / -1 | 3 | Partial capture |
| 09-27 09:49 | 40m | -8 / -12 | SP9LS | -16 / 0 | 4 | ✓ Full exchange observed |
| 09-27 09:47 | 40m | -11 / -13 | S53AK | -14 / -11 | 6 | ✓ Full exchange observed |
| 09-27 09:46 | 40m | -16 / 0 | SP100PKP | -12 / -1 | 2 | Partial capture |
| 09-27 09:44 | 40m | -1 / - | SP6U | - / -13 | 4 | ✓ Closing fragment |
| 09-27 09:40 | 40m | -13 / - | SN100PKP | - / -1 | 2 | Partial capture |
| 09-27 09:36 | 40m | -14 / -9 | SP4GDW | -17 / -5 | 6 | ✓ Full exchange observed |
| 09-27 09:35 | 40m | -4 / - | SO3UOU/M | - / - | 2 | Partial capture |
| 09-27 09:33 | 40m | -19 / -11 | EN100NP | -22 / -1 | 2 | Partial capture |
| 09-27 09:31 | 40m | -5 / +5 | SP6U | -4 / -2 | 5 | ✓ Full exchange observed |
| 09-20 11:43 | 40m | -5 / - | SQ9CWT | -12 / -13 | 4 | ✓ Closing observed |
| 09-20 11:41 | 40m | -7 / - | US5WCE | - / - | 2 | Partial capture |
| 09-20 11:39 | 40m | -5 / -15 | SP4WSL | -8 / 0 | 6 | ✓ Full exchange observed |
| 09-20 11:38 | 40m | -7 / -9 | SP4GDW | -12 / -2 | 4 | ✓ Full exchange observed |
| 09-20 11:36 | 40m | -1 / - | SP7LPD | -6 / +5 | 5 | ✓ Full exchange observed |
| 09-20 11:35 | 40m | +3 / - | SP9WAZ | +3 / -7 | 3 | ✓ Closing observed |
| 09-20 11:34 | 40m | -8 / - | DJ9MA | - / - | 2 | Partial capture |
| 09-20 10:46 | 40m | 0 / - | S53AK | -4 / -2 | 3 | Partial capture |
| 09-20 10:44 | 40m | +2 / - | ES6DO | - / -9 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 123000 -15 803 SP4H RR73; E75T <...> -04
UTC dB Audio Message 173915 +3 2348 SP4H SP5KG +12 173930 +3 2348 SP5KG SP4H R-02 173945 +8 2348 SP4H SP5KG RR73 174000 +5 2349 SP5KG SP4H 73 174030 +3 2350 DO9SAM SP4H -16 (x2) 174115 +15 2351 SP4H DO9SAM 73 174145 -5 2125 SP4H RX3VF LO06 175515 +4 1200 SP4NKJ SP4H KO13 175530 -4 1200 SP4H SP4NKJ +05 175545 +10 1200 SP4NKJ SP4H R-11 175600 -10 1200 SP4H SP4NKJ RR73 175615 +12 1200 SP4NKJ SP4H 73 175300 -7 1548 SQ5NO SP4H KO13 (x2)
UTC dB Audio Message 155345 -15 1681 SP4H RX3VF LO06 155415 -8 1883 SP4H UZ5ZU KN58 155415 -1 1682 SP4H DL1NRC JN39 155445 -14 1883 SP4H UZ5ZU R+04 155445 -2 1682 SP4H DL1NRC JN39 155515 -11 1882 SP4H UZ5ZU R+04 155515 -7 1682 SP4H DL1NRC JN39 (x6) 163145 -15 2284 SP4H JG3TRB -15 (x2) 163245 +8 384 SP4H OH3OJ +00
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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