SP4ART — 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: KO03

Receiver-side FT8 activity involving SP4ART, decoded by SO8OO in southeastern Poland. 63 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-05 and 2026-08-18.

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 63 FT8 messages attributed to SP4ART as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 20 m (32%) and 80 m (16%). Most decodes (95%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 10 40m · 33 20m · 20

First attributed message: 2026-08-05
Last attributed message: 2026-08-18 21:38 UTC

Observed FT8 message patterns

Attributed sample: 63 messages
Active dates: 6 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -23 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 24.

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 SP4ART in decoded directed-looking exchanges:

UA4FKT · European Russia ×2 LZ5UY · Bulgaria DB1EF · Fed. Rep. of Germany DD2FP · Fed. Rep. of Germany EA8AT · Canary Islands F4MGP · France JA9CHI · Japan M0BEW · England M8KKH · England OM1AN · Slovak Republic PA3AGN · Netherlands PD3LKN · Netherlands

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 SP4ART

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 · 35 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 400 km (approx.)
Last such locator decoded: 2026-08-18 21:37 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	SP4ART S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-18 21:38	80m	- / -13	DO9BAU	+5 / -	3	✓ Closing fragment
08-18 21:38	80m	-10 / -17	UA4FKT	+9 / -11	4	✓ Full exchange observed
08-18 21:36	40m	- / -	HB9MZI	-23 / -	2	Partial capture
08-18 21:36	80m	-7 / -14	US2YW	+7 / -	4	✓ Closing observed
08-18 21:35	80m	-14 / +3	SP5MXZ	+2 / -	3	✓ Closing observed
08-16 20:33	40m	-12 / +5	OZ5AGJ	-16 / -9	4	✓ Full exchange observed
08-16 20:33	40m	-11 / -	9A4ZM	-5 / -10	2	Partial capture
08-16 20:27	80m	-8 / -9	SP9UPH	+16 / -3	5	✓ Full exchange observed
08-16 20:24	80m	- / -	UA4FKT	+4 / -	3	Partial capture
08-16 20:17	20m	-6 / -	KJ1R	- / -	4	Partial capture
08-16 20:14	20m	-1 / -	BH2WTV	- / -	3	Partial capture
08-16 20:12	20m	-5 / -1	PA3AGN	-16 / -	5	✓ Closing observed
08-16 20:03	20m	-4 / -	TA2EE	- / -11	2	Partial capture
08-16 20:02	20m	-7 / -	W1ARY	- / -9	6	Partial capture
08-16 19:58	20m	- / -	SV5BYP	-8 / -	5	Partial capture
08-16 19:26	20m	- / -	RC5F	-3 / -	2	Partial capture
08-16 19:24	20m	- / -16	OM1AN	+9 / -	3	✓ Closing fragment
08-16 19:23	20m	- / -1	M8KKH	-12 / -	2	✓ Closing fragment
08-16 19:20	20m	- / -	DB1EF	-20 / -	2	✓ Closing fragment
08-16 14:12	20m	- / -14	PD3LKN	-16 / -	2	✓ Closing fragment
08-15 16:50	40m	-22 / -17	UA3GDJ	-6 / -11	4	✓ Full exchange observed
08-15 16:44	40m	-22 / -	DK0ACI	- / -7	2	✓ Closing fragment
08-15 16:42	40m	- / -13	3Z0L	-14 / -	2	✓ Closing fragment
08-15 16:40	40m	-24 / -	DK7ZT	- / -7	2	✓ Closing fragment
08-15 16:38	40m	-22 / +1	PA2RO	-15 / -6	3	✓ Full exchange observed
08-15 16:36	40m	-20 / -	BD8ELZ	- / -	2	Partial capture
08-15 16:27	20m	- / +4	M0BEW	+2 / -	2	✓ Closing fragment
08-06 19:19	20m	- / +1	2E0ROJ	-17 / -	2	Partial capture
08-06 19:14	20m	- / -17	EA8AT	-8 / -	2	✓ Closing fragment
08-06 19:09	20m	- / -	RZ4FWA	-10 / -	2	Partial capture
08-06 16:29	20m	- / -	F5PBG	-13 / -	3	Partial capture
08-06 16:29	20m	- / -	F5RRS	-15 / -	2	Partial capture
08-06 15:53	40m	- / -	UA4FKT	-13 / -	5	✓ Closing fragment
08-05 18:40	40m	-9 / -14	UA9FMT	-13 / -15	4	Partial capture
08-05 18:29	20m	- / +4	F4MGP	-10 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
213545  +4 1040  SP4ART SP5MXZ RR73
213600 -14 1434  SP5MXZ SP4ART 73
213615  +5 1433  SP4ART US2YW KN28 (x2)
213700  -7 1434  US2YW SP4ART RR73
213715  +8 1433  SP4ART US2YW 73
213730  -8 1434  CQ SP4ART KO03
213745  +5 1946  SP4ART IQ4JO JN63
213800  -8 1434  UA4FKT SP4ART -11
213815 +11 1434  SP4ART UA4FKT R-17
213830 -13 1433  UA4FKT SP4ART RR73
213845  +7 1434  SP4ART UA4FKT 73
213845  +4 2202  SP4ART DO9BAU JO62 (x3)

40m

UTC    dB Audio  Message
165830 -21 1372  CQ SP4ART KO03 (x2)
170115 -14 1372  SP4ART PD0RCQ JO21
144515  -9 1596  SP4ART UT0UE RR73
144600 -22 1373  CQ SP4ART KO03                        a1 (x2)
203015 -17 2392  SP4ART SP7TF RR73
203315  -5 2471  SP4ART 9A4ZM JN86
203330 -11 2475  OZ5AGJ SP4ART -09
203415 -14 2473  SP4ART OZ5AGJ R+05
203430 -14 2391  OZ5AGJ SP4ART RR73
203445 -18 2473  SP4ART OZ5AGJ 73
203500 -11 2390  9A4ZM SP4ART -10
213645 -23 1469  SP4ART HB9MZI JN49 (x2)

20m

UTC    dB Audio  Message
200830  -9 2427  CQ SP4ART KO03
200930  -7 2427  JA9CHI SP4ART RR73
201045 -17 2427  SP4ART DK7ZT -12
201215 -17 1176  SP4ART PA3AGN JO22 (x3)
201400  -5 2426  PA3AGN SP4ART RR73
201415 -17 1176  SP4ART PA3AGN 73
201430  -2 2426  BH2WTV SP4ART KO03 (x3)
201700  -5 2427  KJ1R SP4ART KO03 (x4)

10m

UTC    dB Audio  Message
172730  -4 1371  SP4ART LZ5UY RR73
172830 -11 1343  SP4ART LZ2VQ -05

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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