SP5C — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO03

Receiver-side FT8 activity involving SP5C, decoded by SO8OO in southeastern Poland. 98 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-18.

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 98 FT8 messages attributed to SP5C as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (55%), followed by 40 m (28%) and 80 m (16%). Several six-hour UTC windows tied for the largest share (55%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

98
Messages attributed
4
UTC dates decoded
14
Active 15-min windows
-7 dB
Estimated median S/N

Bands

160m · 54 80m · 16 40m · 27 20m · 1
First attributed message: 2026-06-10
Last attributed message: 2026-09-18 04:33 UTC

Observed FT8 message patterns

Attributed sample
98 messages
Active dates
4 UTC dates
Estimated median S/N
-7 dB
Estimated 10th-90th percentile
-14 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 33, strong (≥ -8 dB) 58.

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 SP5C 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 SP5C

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
KO03 · 59 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
400 km (approx.)
Last such locator decoded
2026-09-18 04:27 UTC

Other locator fields attributed to this token: KO02 (16).

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 UTCBandSP5C S/NCounterpartCounterpart S/NMsgsCapture
09-18 04:37 40m - / - US2UM +4 / - 3 Partial capture
09-18 04:31 40m - / - UA3POG -12 / - 2 Partial capture
09-18 04:27 40m -23 / - XQ3SK - / - 2 ✓ Closing fragment
09-18 04:09 160m -12 / - G8OO - / -16 2 ✓ Closing fragment
09-18 03:57 160m -8 / - V26OC - / - 12 Partial capture
09-18 03:50 160m -6 / - V26OC - / - 4 Partial capture
09-18 03:40 160m -6 / - V26OC - / - 10 Partial capture
09-18 03:38 160m -14 / - W5GRP - / - 2 Partial capture
09-18 03:35 160m -13 / +2 DL8TV -14 / -5 3 ✓ Full exchange observed
09-18 03:33 160m -6 / -4 F1PBZ -3 / -13 7 ✓ Full exchange observed
09-18 03:33 160m -12 / -13 UX7QV +4 / -2 5 ✓ Full exchange observed
09-18 03:31 160m -8 / - SP7ENZ -24 / -24 3 ✓ Closing observed
09-18 03:30 160m -4 / -1 YL2EA -17 / - 5 ✓ Full exchange observed
09-17 20:29 80m +2 / - JA0GCI - / - 4 Partial capture
09-17 20:26 80m - / - UR4QWW -6 / - 4 Partial capture
09-17 20:24 80m -6 / -16 JH2FXK -24 / +2 5 ✓ Full exchange observed
09-17 20:21 80m -3 / - JA8JNU - / - 6 Partial capture
09-17 20:18 80m -6 / - JH1FSB - / - 3 Partial capture
09-17 20:04 160m -14 / - RI1FJZ - / -12 4 ✓ Closing fragment
09-17 19:10 40m - / -5 RX9ABI -5 / - 3 Partial capture
09-17 19:01 40m - / +2 II0IHMG -6 / - 3 Partial capture
09-17 18:57 40m -8 / - SV2FNT - / - 2 Partial capture
09-01 17:45 40m -2 / - RI1FJL - / -22 11 Partial capture
09-01 17:33 40m +4 / - RI1FJL - / - 5 Partial capture
09-01 17:26 40m +5 / - RI1FJL - / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
190130  -6 1568  SP5C II0IHMG +02 (x3)
191015  -7 2609  SP5C RX9ABI -05 (x3)
032245 -18 2359  CQ SP5C KO03                          a1
042700 -22 1681  XQ3SK SP5C KO03 (x2)
043130 -12 1540  SP5C UA3POG KO83 (x2)
043345 -13  440  TN8GD SP5C R-23
043730  +7 1355  SP5C US2UM KO50 (x3)
160m 
UTC    dB Audio  Message
040045  -8 2327  V26OC SP5C KO03 (x7)
040615 -12 2327  CQ SP5C KO03 (x6)
040945 -11 2327  G8OO SP5C -16 (x2)
80m 
UTC    dB Audio  Message
202300  -2 1951  JA8JNU SP5C KO03 (x2)
202430  -9 1951  JH2FXK SP5C KO03 (x2)
202515 -24 1795  SP5C JH2FXK -16
202530  -8 1951  JH2FXK SP5C R+02
202545 -24 1795  SP5C JH2FXK RR73
202645  -2 2449  SP5C UR4QWW KN77 (x4)
202930  +3 1951  JA0GCI SP5C KO03 (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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