SP5BTB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO01

Receiver-side FT8 activity involving SP5BTB, decoded by SO8OO in southeastern Poland. 49 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-06.

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 49 FT8 messages attributed to SP5BTB as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (51%), followed by 80 m (49%). Several six-hour UTC windows tied for the largest share (53%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (92%); the estimated median was +14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+14 dB

Estimated median S/N

Bands

80m · 24 40m · 25

First attributed message: 2026-06-09
Last attributed message: 2026-09-06 05:42 UTC

Observed FT8 message patterns

Attributed sample: 49 messages
Active dates: 4 UTC dates
Estimated median S/N: +14 dB
Estimated 10th-90th percentile: -8 to +18 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 45.

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 SP5BTB in decoded directed-looking exchanges:

9A4ZM · Croatia DL3MIB · Fed. Rep. of Germany LA1QRO · Norway SP3SWJ · Poland SP6FME · Poland T77NC · San Marino UA4FKT · European Russia DL1IP · Fed. Rep. of Germany HF5A · Poland

Most frequent locator attributed to SP5BTB

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: KO01 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 182 km (approx.)
Last such locator decoded: 2026-09-06 05:42 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	SP5BTB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-06 05:42	40m	+16 / -	OZ7SKB/P	- / -10	2	Partial capture
09-06 05:39	40m	+14 / -2	SP3SWJ	-2 / +5	5	✓ Full exchange observed
09-06 05:38	40m	+13 / -1	SP6FME	+7 / +3	4	✓ Full exchange observed
09-06 05:36	40m	+13 / 0	9A4ZM	+9 / -2	6	✓ Full exchange observed
09-06 05:35	40m	+17 / -	LA1QRO	-7 / -3	4	✓ Closing observed
09-06 05:29	40m	+16 / -3	T77NC	+1 / -12	11	✓ Full exchange observed
09-06 05:24	40m	+4 / -	T77NC	- / -	2	Partial capture
09-06 04:48	40m	- / -1	DL3MIB	+6 / -	3	✓ Closing fragment
09-06 04:48	40m	- / -	F5RRS	-4 / -	3	Partial capture
07-22 18:18	20m	- / -16	EA1IOK	-8 / -	4	Partial capture
07-22 18:08	80m	+17 / -	G4BMM	- / -	2	Partial capture
07-22 18:03	80m	+15 / -	ON5RJ	- / -	7	Partial capture
07-22 17:58	80m	+19 / +1	DL1IP	+1 / -9	6	✓ Full exchange observed
07-22 17:58	80m	+16 / -11	HF5A	+16 / -	5	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
053745 +13  537  9A4ZM SP5BTB RR73
053800 +10  532  SP5BTB 9A4ZM 73
053815 +12  537  SP6FME SP5BTB +03
053830  +6  537  SP5BTB SP6FME R-01
053845 +14  537  SP6FME SP5BTB RR73
053900  +8  537  SP5BTB SP6FME 73
053930  -2  537  SP5BTB SP3SWJ JO82
053945 +13  537  SP3SWJ SP5BTB +05
054000  -3  537  SP5BTB SP3SWJ R-02
054015 +15  537  SP3SWJ SP5BTB RR73
054030  +0  537  SP5BTB SP3SWJ 73
054215 +13  537  OZ7SKB/P SP5BTB KO01 (x2)
204130  +5  580  SP5BTB F8MRQ JN17
204330  +9  580  SP5BTB UA4FKT 73

20m

UTC    dB Audio  Message
181830  -7  567  SP5BTB EA1IOK IN62 (x4)

80m

UTC    dB Audio  Message
175915  +0  666  SP5BTB DL1IP RR73
175930 +17  666  DL1IP SP5BTB 73
175945 +17  519  SP5BTB HF5A JO92 (x2)
180030 +16  666  HF5A SP5BTB RR73
180045 +17  519  SP5BTB HF5A 73
180315 +15  667  ON5RJ SP5BTB KO01 (x7)
180830 +17  667  G4BMM SP5BTB KO01 (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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