ON4DS — 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: JO21

Receiver-side FT8 activity involving ON4DS, decoded by SO8OO in southeastern Poland. 1,681 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 16 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-30.

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 1,681 FT8 messages attributed to ON4DS as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (42%), followed by 20 m (33%) and 10 m (19%). Most decodes (76%) 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 -7 dB.

Overview

1,681

Messages attributed

UTC dates decoded

105

Active 15-min windows

-7 dB

Estimated median S/N

Bands

160m · 1 80m · 108 60m · 710 40m · 1 20m · 547 10m · 314

First attributed message: 2026-06-10
Last attributed message: 2026-10-30 21:45 UTC

Observed FT8 message patterns

Attributed sample: 1,681 messages
Active dates: 16 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -17 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 250, moderate (-15 to -9 dB) 468, strong (≥ -8 dB) 963.

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 ON4DS in decoded directed-looking exchanges:

SP6EFY · Poland ×2 TA3KJ · Asiatic Turkey ×2 UR5WCS · Ukraine ×2 DC9JVN · Fed. Rep. of Germany ×2 OZ0A · Denmark ×2 PA3FUJ · Netherlands ×2 DM2RR · Fed. Rep. of Germany EU6AX · Belarus HA3HZ · Hungary PU4YDZ · Brazil SP5OFF · Poland SP9IMY · Poland

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 ON4DS

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: JO21 · 1,078 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-10-30 21:43 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	ON4DS S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-30 21:44	60m	-7 / -	IU2VFU	- / -23	3	✓ Closing fragment
10-30 21:38	60m	-3 / -	SP4WJ	- / -22	5	✓ Closing fragment
10-30 21:35	60m	-3 / -	IZ0AIO	- / -16	3	✓ Closing fragment
10-30 21:32	60m	0 / -	HA1DCQ	- / +1	2	✓ Closing fragment
10-30 21:20	60m	-4 / -14	R3BCK	+8 / +6	8	✓ Full exchange observed
10-30 21:20	60m	0 / -16	R2DQ	-8 / -6	5	✓ Full exchange observed
10-30 21:12	60m	-6 / +2	IU4PTA	-10 / +5	4	✓ Full exchange observed
10-30 21:05	60m	-6 / -	UB3BDJ	-9 / -14	13	Partial capture
10-30 20:55	60m	- / -	OE9HGV	-10 / -	2	Partial capture
10-30 20:48	60m	-7 / -20	G8OO	-12 / -17	6	✓ Full exchange observed
10-30 20:45	60m	-2 / +1	IU3VGK	-22 / -24	5	✓ Full exchange observed
10-30 20:36	60m	-6 / -	HG9FS	- / +8	2	✓ Closing fragment
10-30 20:26	60m	-6 / -13	DL3DQL/P	-9 / -20	9	✓ Full exchange observed
10-30 20:18	60m	-10 / -	YO5QDI	- / -21	2	✓ Closing fragment
10-30 20:17	60m	- / -	DL4YDR	-10 / -	3	Partial capture
10-30 20:12	60m	-16 / +2	IW2FUT	-5 / +1	5	✓ Full exchange observed
10-30 19:46	60m	-7 / -	SQ8AA	- / -24	24	Partial capture
10-30 19:43	60m	-7 / -	IW2FPI	- / +2	2	✓ Closing fragment
10-30 19:39	60m	-6 / -1	DL3JJ	-10 / +5	5	✓ Full exchange observed
10-30 19:35	60m	-8 / -2	DC9JVN	-8 / -6	5	✓ Full exchange observed
10-30 19:31	60m	-3 / -	HB9RJD	-11 / +2	4	✓ Full exchange observed
10-30 19:29	60m	-2 / 0	DB6FA	+6 / 0	4	✓ Full exchange observed
10-30 19:28	60m	-4 / -	IT9LPO	- / -10	2	✓ Closing fragment
10-30 19:24	60m	0 / -10	DF4SI	-5 / -5	5	✓ Full exchange observed
10-30 19:22	60m	-4 / -	IV3DSG	+10 / -	5	✓ Full exchange observed
10-30 19:19	60m	-5 / -6	YO9HP	0 / +3	4	✓ Full exchange observed
10-30 19:18	60m	0 / -	DL3NGN	+5 / -15	5	✓ Full exchange observed
10-30 19:17	60m	0 / -	DL3RN	- / -11	2	✓ Closing fragment
10-30 19:15	60m	0 / -	OE8PIT	+24 / -	5	✓ Full exchange observed
10-16 19:17	60m	0 / +2	DL4HTK	-13 / -14	5	✓ Full exchange observed
10-16 19:13	60m	-4 / +1	YL3NU	-13 / -6	4	✓ Full exchange observed
10-16 19:11	60m	-5 / -	SP2DDV	- / -4	2	✓ Closing fragment
10-16 19:10	60m	-4 / -	OH5YZ	- / -17	2	✓ Closing fragment
10-16 19:06	60m	-3 / +4	OE5OSP	-10 / -11	5	✓ Full exchange observed
10-16 18:32	60m	0 / -	IK4CBO	-10 / +4	5	✓ Full exchange observed
10-16 18:30	60m	0 / -	YL3KW	-4 / -12	5	✓ Full exchange observed
10-16 18:28	60m	-2 / -	F6EAZ	- / -17	3	✓ Closing fragment
10-16 18:26	60m	-1 / -	OH3MB	- / -11	3	✓ Closing fragment
10-16 18:23	60m	-2 / -8	ER3UA	-2 / -12	6	✓ Full exchange observed
10-16 18:23	60m	0 / 0	OH1LA	-14 / -15	4	✓ Full exchange observed
10-16 18:20	60m	-3 / +2	HA5CPN	-15 / -5	5	✓ Full exchange observed
10-16 18:19	60m	-3 / -	DK9RC	-17 / -5	3	✓ Closing observed
10-16 18:17	60m	-2 / -	DK9TZ	-4 / -	5	✓ Full exchange observed
10-16 18:08	60m	-17 / -10	LA9JKA	-14 / +4	9	✓ Full exchange observed
10-16 18:04	60m	- / -	IK1HSO	-6 / -	2	✓ Closing fragment
10-16 17:58	60m	- / -	DK0RPO	-10 / -	3	✓ Closing fragment
10-16 17:55	60m	-16 / -1	DL3SAT	+4 / -	4	✓ Full exchange observed
10-16 17:33	60m	-16 / -6	DL1TTE	-17 / 0	5	✓ Full exchange observed
10-16 17:17	60m	-17 / -9	IW2CAK	-3 / +6	5	✓ Full exchange observed
10-16 17:17	60m	-18 / -8	PA3FUJ	-4 / +4	6	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
213800  +2 2185  SP4WJ ON4DS -22 (x5)
214030  -3 2185  CQ ON4DS JO21 (x7)
214400  -4 2185  IU2VFU ON4DS -23 (x3)

80m

UTC    dB Audio  Message
195615  -1  750  ON4DS DL1UDO JO31
195845  +8 1042  ON4DS SP2DTW -05
200300  -9 1042  SP2DTW ON4DS R-06 (x2)
200600 -24 1043  CQ ON4DS JO21
200615 -15 1124  ON4DS ON1ANW JO11
200630 -11 1042  ON1ANW ON4DS +00
200645 -16 1124  ON4DS ON1ANW R+00
200700 -12 1042  ON1ANW ON4DS RR73
200715 -16 1124  ON4DS ON1ANW 73
200715 -17 2405  ON4DS DO5AX JO52
200730  -9 1043  CQ ON4DS JO21 (x2)
201715 -11  541  ON4DS ON4MAP 73
202000  -8 1042  DL9IX ON4DS +00

20m

UTC    dB Audio  Message
155115  -9 2217  ON4DS MW7FKA R+05
155115 -17 2298  ON4DS G4XWR IO94
155145 -11 2218  ON4DS MW7FKA R+05
155145 -16 2299  ON4DS G4XWR IO94 (x8)
160000  -8 2218  CQ ON4DS JO21
160130 -12 2217  EB4ERW ON4DS -14
160500  -1 2218  MW7FKA ON4DS -14
160545 -13 2217  ON4DS MW7FKA 73

160m

UTC    dB Audio  Message
204315 +12 2516  ON4DS 9A2AJ -19 (x2)
204415  -2 1296  ON4DS SQ9FMU JO90

10m

UTC    dB Audio  Message
144230 -16 1188  CQ ON4DS JO21 (x5)
144500 -15 1188  EU6AX ON4DS +14
144545 -13 2118  ON4DS EU6AX 73
144600 -18 1188  CQ ON4DS JO21
144700 -10  688  IU6TPB ON4DS +06
144830 -10  688  PP5CF ON4DS JO21 (x3)
145530  -3  688  <...> ON4DS JO21 (x3)

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

2 CW reception events in the last 30 days.

40m: 2 events; last heard 2026-11-02 17:29 UTC

Latest CW receptions

UTC	Band	kHz	S/N · 500 Hz	WPM	Listen
2026-11-02 17:29:48	40m	7010.640	12.9 dB	31.7	WebSDR ↗
2026-10-12 16:58:15	40m	7012.329	22 dB	32.8	WebSDR ↗

CW reception history

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