ON3SD — 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: Belgium Most frequent locator attributed to this token: JO11

Receiver-side FT8 activity involving ON3SD, decoded by SO8OO in southeastern Poland. 148 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-23 and 2026-10-14.

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 148 FT8 messages attributed to ON3SD as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (56%), followed by 40 m (44%). Several six-hour UTC windows tied for the largest share (70%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

148

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

40m · 65 20m · 83

First attributed message: 2026-06-23
Last attributed message: 2026-10-14 13:49 UTC

Observed FT8 message patterns

Attributed sample: 148 messages
Active dates: 13 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -23 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 72, moderate (-15 to -9 dB) 46, strong (≥ -8 dB) 30.

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 ON3SD in decoded directed-looking exchanges:

EA5D · Spain F1BAY · France F1PBZ · France F4JVF · France MI0NWA · Northern Ireland OH3CD · Finland OM3PC · Slovak Republic W4PSK · United States YO2AMU · Romania DF3JO · Fed. Rep. of Germany DF7NO · Fed. Rep. of Germany DK6WS · Fed. Rep. of Germany

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 ON3SD

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: JO11 · 67 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,331 km (approx.)
Last such locator decoded: 2026-10-14 13:43 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	ON3SD S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-14 13:45	40m	- / -	F4BYA	-4 / -	4	Partial capture
10-14 13:41	40m	-21 / -1	DK7CVD	-14 / -16	5	✓ Full exchange observed
10-12 07:24	40m	- / -	DK8WQ	+2 / -	4	✓ Closing fragment
10-12 07:24	40m	- / +9	DF7NO	-8 / -	2	✓ Closing fragment
09-29 10:10	40m	- / -1	IU2THY	-4 / -	5	Partial capture
09-29 10:04	40m	- / -17	HA1BF	-10 / -	2	✓ Closing fragment
09-14 16:35	40m	+2 / -	US2YW	+23 / -12	4	Partial capture
09-14 16:35	40m	+2 / -10	LA5AKA	+2 / -17	8	✓ Full exchange observed
09-14 16:30	40m	-11 / -	M0DGD	- / -	3	Partial capture
09-14 15:50	40m	-16 / -	DG2EBG	- / -14	2	Partial capture
09-14 15:47	40m	- / -	DK1MBY	-15 / -	3	Partial capture
09-14 15:46	40m	-18 / -1	G0RVY	-10 / -3	4	Partial capture
09-14 15:27	40m	-16 / +6	PD1DP	-18 / -4	3	✓ Full exchange observed
09-14 15:23	40m	-20 / -	ON1DGN	- / -5	2	✓ Closing fragment
09-14 15:12	40m	-13 / -	DK6WS	-10 / -	3	✓ Closing observed
09-14 15:09	40m	-17 / -1	OZ1SMB	+6 / -	6	✓ Closing observed
09-14 15:07	40m	-18 / -13	OE8PIT	-8 / -9	6	✓ Full exchange observed
09-14 15:05	40m	-18 / -	PD3CFG	- / -10	2	✓ Closing fragment
09-11 09:46	40m	- / -10	OK3MB	-14 / -	4	✓ Closing fragment
09-11 09:43	40m	- / -9	IK4TVP	-20 / -	5	✓ Closing fragment
09-11 09:43	40m	- / -	ON6SAT	-11 / -	2	✓ Closing fragment
09-11 09:23	40m	- / -5	OT2T	-8 / -	5	✓ Closing fragment
09-11 09:14	40m	- / -	SP7ROM	-9 / -	3	Partial capture
09-11 09:06	40m	-23 / -12	OZ9FF	-7 / -5	4	✓ Full exchange observed
09-11 09:02	40m	-23 / -	ON3SLK	- / -4	2	Partial capture
09-11 08:51	40m	-10 / -	SO5WD	- / -15	2	Partial capture
09-11 08:51	40m	-24 / +9	DL8TV	-9 / +1	9	✓ Full exchange observed
09-11 08:47	40m	- / -19	OK2PHI	-8 / -	5	Partial capture
09-11 08:36	40m	-15 / -6	DL3MIB	0 / -	4	✓ Closing observed
09-11 07:56	40m	-13 / -	G3XWH	- / -	2	✓ Closing fragment
09-11 07:53	40m	-16 / -	GM5CAR	- / -12	3	✓ Closing fragment
09-11 07:52	40m	-16 / -7	G3XWH	-13 / +2	3	Partial capture
08-21 08:30	20m	-21 / -	F4IIX	- / -3	2	Partial capture
08-11 07:51	20m	-23 / -	DH2RL	-16 / -4	7	Partial capture
08-11 07:46	20m	- / -	RV6F	-9 / -	7	Partial capture
08-11 07:46	20m	- / -19	F4JVF	-20 / -	4	✓ Closing fragment
08-07 08:19	20m	-2 / -	OH3CD	- / -1	2	✓ Closing fragment
08-07 08:13	20m	-11 / -	VP2MAA	- / -	3	Partial capture
08-07 08:08	20m	-18 / -	DP1KEB	- / -	2	Partial capture
08-07 08:03	20m	-18 / -	SP7MOC	- / -	3	Partial capture
07-31 09:58	20m	-7 / -	DL1R	- / -11	2	Partial capture
07-31 09:56	20m	-4 / 0	F1PBZ	-3 / -6	6	✓ Full exchange observed
07-31 09:49	20m	-4 / -	OZ1APZ	- / -13	2	Partial capture
07-31 09:33	20m	-11 / -	MI0NWA	- / -11	4	✓ Closing fragment
07-31 09:30	20m	-14 / -	YO2AMU	- / -6	4	Partial capture
07-31 08:38	20m	-7 / -11	F1BAY	-4 / -6	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
130830 -19 1157  OE3KNS ON3SD JO11
134145 -14  241  ON3SD DK7CVD JO53
134200 -17 1409  CQ ON3SD JO11
134215 -12  242  ON3SD DK7CVD JO53
134230 -20 1409  DK7CVD ON3SD -16
134245 -15  242  ON3SD DK7CVD R-01
134300 -22 1409  DK7CVD ON3SD RR73
134330 -24 1409  CQ ON3SD JO11                         a1
134515 -15 1141  ON3SD OE7KTI JN57
134515  -7 2982  ON3SD F4BYA JN19 (x2)
134600 -20 1409  PD3JW ON3SD -15
134615  -3 2982  ON3SD F4BYA JN19 (x2)
134900 -19 1772  PD3JW ON3SD RR73

20m

UTC    dB Audio  Message
074730 -22 1744  ON3SD F4JVF 73
074800  -9 1438  ON3SD RV6F LN14 (x4)
075100 -17 1743  ON3SD DH2RL JN68 (x4)
075315 -24 1743  DH2RL ON3SD -04 (x3)
082445  +7  847  ON3SD EN35UKR R-14
083000 -23 2274  F4IIX ON3SD -03 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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