S51R — 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: Slovenia Most frequent locator attributed to this token: JN76

Receiver-side FT8 activity involving S51R, decoded by SO8OO in southeastern Poland. 344 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-09-28.

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 344 FT8 messages attributed to S51R as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 20 m (48%) and 10 m (2%). The busiest six-hour window was 03:00-09:00 UTC, containing 45% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (82%); the estimated median was 0 dB.

Overview

344

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 1 40m · 170 20m · 166 10m · 7

First attributed message: 2026-06-17
Last attributed message: 2026-09-28 12:08 UTC

Observed FT8 message patterns

Attributed sample: 344 messages
Active dates: 20 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -10 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 57, strong (≥ -8 dB) 281.

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 S51R in decoded directed-looking exchanges:

GJ0KYZ · Jersey ×2 OZ9FF · Denmark ×2 C91RU · Mozambique DH5BM · Fed. Rep. of Germany DJ0MAB · Fed. Rep. of Germany DK8HC · Fed. Rep. of Germany DL1MGU · Fed. Rep. of Germany EA4ZM · Spain F1PPH · France F4JZW · France F5RRS · France NF3R · United States

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 S51R

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: JN76 · 75 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 631 km (approx.)
Last such locator decoded: 2026-09-28 12:08 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	S51R S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-28 12:08	40m	+9 / -	SO3UOU/M	- / -6	2	Partial capture
09-28 03:35	40m	- / -2	RC5F	+5 / -	5	✓ Closing fragment
09-28 03:15	40m	- / +3	F4BYA	+2 / -	5	✓ Closing fragment
09-28 03:14	40m	- / -3	RV6MX	-7 / -	3	✓ Closing fragment
09-28 03:12	40m	- / +8	G3TKT	-8 / -	2	✓ Closing fragment
09-26 08:52	40m	-1 / -	GJ0KYZ	- / -12	2	✓ Closing fragment
09-26 08:50	40m	0 / 0	IW2DNI	-13 / -1	3	✓ Full exchange observed
09-26 08:49	40m	+5 / -	IW2ODG	- / -4	2	✓ Closing fragment
09-26 08:47	40m	+4 / -	ON8WR	- / -21	2	✓ Closing fragment
09-26 08:46	40m	+6 / -	PD2MAC	- / -14	2	✓ Closing fragment
09-26 08:45	40m	+4 / -	HA5SUN	-9 / +2	4	✓ Full exchange observed
09-26 08:42	40m	+3 / -	OH3MB	-22 / -9	4	✓ Closing observed
09-26 08:41	40m	+3 / -	G0CLH	- / -15	2	Partial capture
09-26 08:39	40m	+3 / -	DK6WS	- / -6	2	✓ Closing fragment
09-26 08:36	40m	+2 / -	9A/DG8MFV	-6 / +1	3	Partial capture
09-26 08:35	40m	+3 / -	SV9QWC	- / -2	2	✓ Closing fragment
09-26 08:33	40m	+8 / -	F1IQH	- / -11	2	✓ Closing fragment
09-26 08:33	40m	+6 / +3	DL9KM	-14 / +2	7	✓ Full exchange observed
09-26 08:31	40m	+7 / +3	LA8ENA	-20 / -3	4	✓ Full exchange observed
09-26 08:30	40m	+6 / -	SK7RN	- / -16	2	✓ Closing fragment
09-26 08:29	40m	+5 / -10	OZ9FF	-11 / -14	4	✓ Full exchange observed
09-26 03:16	40m	+7 / -	TN8GD	- / -14	3	✓ Closing fragment
09-26 03:08	40m	+4 / -	R2BKF	- / -14	2	✓ Closing fragment
09-26 03:06	40m	+6 / -	US5EAA	- / 0	2	✓ Closing fragment
09-26 03:04	40m	+14 / -	SP1ZMO	- / -17	2	✓ Closing fragment
09-26 03:03	40m	+16 / -	K3RH	- / -23	2	✓ Closing fragment
09-26 03:00	40m	+16 / -16	OD5KU	-13 / -13	4	✓ Full exchange observed
09-26 02:58	40m	+15 / -	WP4TUN	- / -15	4	✓ Closing fragment
09-26 02:57	40m	+20 / -	UT2AU	- / +3	2	✓ Closing fragment
09-26 02:56	40m	+16 / -	AA3DP	- / -17	2	Partial capture
09-26 02:55	40m	+18 / -	A71AH	- / -12	2	✓ Closing fragment
09-26 02:54	40m	+18 / -	KF9UG	- / -11	2	✓ Closing fragment
09-26 02:53	40m	+16 / -	RZ4FWA	- / -10	2	Partial capture
09-26 02:51	40m	+16 / -	AI4FR	- / -16	3	✓ Closing fragment
08-30 04:18	20m	- / +1	OD5ZZ	-11 / -	2	✓ Closing fragment
08-29 08:13	20m	+10 / +2	EA4ZM	-8 / -5	4	✓ Full exchange observed
08-29 08:13	20m	+8 / +3	F4JZW	+5 / -2	10	✓ Full exchange observed
08-29 08:09	20m	+7 / -9	PD2RAL	-7 / -15	6	✓ Full exchange observed
08-29 08:07	20m	+5 / -	DH5BM	- / -3	2	✓ Closing fragment
08-29 08:04	20m	+12 / -	SV1EKI	- / -4	2	✓ Closing fragment
08-29 08:04	20m	- / -	F4BYA	-2 / -	2	Partial capture
08-29 08:03	20m	+12 / -	SV1MNE	- / -19	2	✓ Closing fragment
08-29 08:01	20m	+7 / -6	F5RRS	-2 / -2	7	✓ Full exchange observed
08-29 07:59	20m	+1 / -	VK6BAD	- / -14	2	Partial capture
08-29 07:57	20m	+5 / +2	UT7UJ	+12 / +2	6	✓ Full exchange observed
08-29 07:56	20m	+6 / -	YV5JLO	- / -	2	✓ Closing fragment
08-22 16:04	20m	- / 0	OZ9FF	-4 / -	2	✓ Closing fragment
08-14 16:39	20m	- / -3	UN7PNF	-12 / -	2	✓ Closing fragment
08-14 16:30	20m	+2 / -	F1PPH	- / -15	4	✓ Closing fragment
08-14 16:29	20m	0 / -2	RY7G	+14 / -5	6	✓ 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
031430  -4  357  S51R RV6MX R-03 (x2)
031530  +4 2325  S51R F4BYA JN19 (x5)
033530  +4  963  S51R RC5F KO85 (x5)
113645  +6  705  SO3UOU/M S51R +02 (x3)

20m

UTC    dB Audio  Message
081415  +7  544  EA4ZM S51R R-05
081430  +7 2177  S51R F4JZW R+09
081445 +13  544  EA4ZM S51R R-05
081500  +7 2177  S51R F4JZW R+09
081500 -11  625  S51R DK8HC/P -01
081515 +10  544  F4JZW S51R RR73
081530  -3 1818  S51R EA4ZM RR73
081545  +6  544  F4JZW S51R RR73 (x3)
081715 +12  544  CQ S51R JN76 (x2)
081830  -4  544  S51R F6HUK +02
041815 -12 1029  S51R OD5ZZ R+01 (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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