SP4R — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO13

Receiver-side FT8 activity involving SP4R, decoded by SO8OO in southeastern Poland. 67 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-26 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 67 FT8 messages attributed to SP4R 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 (52%), followed by 160 m (33%) and 80 m (15%). Several six-hour UTC windows tied for the largest share (52%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

160m · 22 80m · 10 40m · 35

First attributed message: 2026-08-26
Last attributed message: 2026-10-23 21:28 UTC

Observed FT8 message patterns

Attributed sample: 67 messages
Active dates: 5 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -12 to +17 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 53.

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 SP4R in decoded directed-looking exchanges:

RI1FJL · Franz Josef Land ×2 7P8GE · Lesotho RI1FJZ · Franz Josef Land VK3JMA · Australia DJ0BS · Fed. Rep. of Germany HA1BF · Hungary LA5ZUA · Norway OK1PPL · Czech Republic OZ9FF · Denmark R2FEA · Kaliningrad RZ4FWA · European Russia SZIA

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 SP4R

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 · 32 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 405 km (approx.)
Last such locator decoded: 2026-10-23 21:27 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	SP4R S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 21:22	160m	+17 / -	7P8GE	- / +9	9	✓ Closing fragment
10-23 21:18	160m	+18 / -	7P8GE	- / -	5	Partial capture
09-22 12:05	40m	-4 / -4	DJ0BS	-13 / -	5	✓ Closing observed
09-22 12:02	40m	-10 / -	LA5ZUA	- / -13	4	✓ Closing fragment
09-22 12:00	40m	-10 / -	R2FEA	-5 / +2	7	✓ Full exchange observed
09-22 11:57	40m	-13 / -1	OZ9FF	-3 / -	5	✓ Full exchange observed
09-22 11:55	40m	-13 / +8	HA1BF	+10 / +7	4	✓ Full exchange observed
09-22 08:21	40m	- / -	UT4PA	+2 / -	2	Partial capture
09-22 08:19	40m	-7 / -16	OK1PPL	-20 / -7	6	✓ Full exchange observed
09-22 08:17	40m	-6 / -	RZ4FWA	- / -10	3	✓ Closing fragment
09-22 08:10	40m	-8 / -	TF5B	- / -4	12	✓ Closing fragment
09-20 19:44	160m	-3 / -	RI1FJZ	- / -20	5	✓ Closing fragment
08-29 23:18	160m	0 / -	RI1FJL	- / -	3	✓ Closing fragment
08-26 00:33	80m	- / -	DO9BAU	+5 / -	13	Partial capture
08-26 00:11	80m	+3 / -	RI1FJL	- / -22	10	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
211815 +23 2933  7P8GE SP4R KO13 (x5)
212130 -17 1555  SP4R RA0AF -14
212245 +20 3030  7P8GE SP4R KO13 (x9)

40m

UTC    dB Audio  Message
120045  -8 1747  SP4R R2FEA +11
120100 -13 1974  R2FEA SP4R R+02
120115  -3 1746  SP4R R2FEA RR73
120130  -6 1974  R2FEA SP4R R+14
120145  -5 1746  SP4R R2FEA RR73
120200  -6 1973  R2FEA SP4R 73
120245 -14 1974  LA5ZUA SP4R KO13 (x4)
120500 -14 1662  SP4R DJ0BS JO52 (x4)
120645  -4 1974  DJ0BS SP4R RR73

80m

UTC    dB Audio  Message
001615  +8 1964  RI1FJL SP4R R-19 (x2)
003300  +8 2202  SP4R DO9BAU JO62 (x13)

20m

UTC    dB Audio  Message
043345 -13 1492  SP4R VK3JMA RR73

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.

Explore CW reception at SO8OO

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