8D81RI — 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: Indonesia

Receiver-side FT8 activity involving 8D81RI, decoded by SO8OO in southeastern Poland. 265 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-11 and 2026-08-20.

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 265 FT8 messages attributed to 8D81RI as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (90%), followed by 10 m (6%) and 40 m (5%). Most decodes (87%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

265

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 12 20m · 238 10m · 15

First attributed message: 2026-08-11
Last attributed message: 2026-08-20 14:52 UTC

Observed FT8 message patterns

Attributed sample: 265 messages
Active dates: 6 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -15 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 101, strong (≥ -8 dB) 138.

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 8D81RI in decoded directed-looking exchanges:

DL70ESSEN · Fed. Rep. of Germany ×8 RZ3Z/P · European Russia ×6 F4LHR/P · France ×4 OK2HF/P · Czech Republic ×4 EN35UKR · Ukraine ×3 R0SDM/P · Asiatic Russia ×2 SP1905MFK · Poland ×2 3B8/SQ9UM · Mauritius 8F81SU · Indonesia 9A2HX/P · Croatia DB1BAC/P · Fed. Rep. of Germany DK2WC/R · 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.

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	8D81RI S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-16 21:31	20m	-15 / -	DL70ESSEN	-6 / -	4	✓ Closing observed
08-16 21:01	20m	- / -	DL70ESSEN	-9 / -	3	Partial capture
08-16 20:55	20m	- / -	<...>	-6 / -	2	✓ Closing fragment
08-16 20:53	20m	-16 / -	DL70ESSEN	-5 / -	2	✓ Closing observed
08-16 20:47	20m	- / -	DL2SWA	-2 / -	3	Partial capture
08-16 20:46	20m	-15 / -	DL70ESSEN	-4 / -	2	✓ Closing observed
08-16 20:38	20m	- / -	DL2WS	-8 / -	2	Partial capture
08-16 20:20	20m	- / -	PA2MP	-8 / -	3	Partial capture
08-16 19:42	20m	-8 / -	<...>	- / -	2	✓ Closing fragment
08-16 19:38	20m	-4 / -	DL70ESSEN	- / -	3	✓ Closing fragment
08-16 19:33	20m	-3 / -	DL70ESSEN	- / -	2	✓ Closing fragment
08-16 19:27	20m	- / -	DJ2MS	-13 / -	2	Partial capture
08-16 19:21	20m	-4 / -	<...>	-2 / -	10	✓ Closing fragment
08-16 19:19	20m	- / -	DJ2MS	-12 / -	5	Partial capture
08-16 19:16	20m	-6 / -	<...>	-4 / -	4	✓ Closing fragment
08-16 19:08	20m	-5 / -	<...>	- / -	3	✓ Closing fragment
08-16 19:07	20m	- / -	SP1905MFK	-10 / -	2	✓ Closing fragment
08-16 19:02	20m	-2 / -	<...>	- / -	2	✓ Closing fragment
08-16 18:51	20m	-5 / -	<...>	0 / -	8	✓ Closing fragment
08-16 18:47	20m	- / -3	PA0LUX	-12 / -	2	Partial capture
08-16 18:37	20m	-5 / -	<...>	-6 / -	15	✓ Closing fragment
08-16 18:31	20m	-4 / -	<...>	0 / -	5	✓ Closing fragment
08-16 18:16	20m	-5 / -	<...>	-10 / -	9	✓ Closing fragment
08-16 18:10	20m	-6 / -	EA4GA/P	+2 / -	6	✓ Closing observed
08-16 18:08	20m	-8 / -	<...>	- / -	2	✓ Closing fragment
08-16 17:58	20m	-9 / -	<...>	+3 / -	8	✓ Closing fragment
08-16 17:51	20m	-10 / -	<...>	-18 / -	5	✓ Closing fragment
08-16 17:45	20m	-7 / -	<...>	-20 / -	5	✓ Closing fragment
08-16 17:30	20m	-8 / -	<...>	-7 / -	11	✓ Closing fragment
08-16 17:25	20m	-7 / -	<...>	- / -	3	✓ Closing fragment
08-16 17:19	20m	- / -	DK9FW	-10 / -	4	Partial capture
08-16 17:15	20m	-6 / -	<...>	-5 / -	5	✓ Closing fragment
08-16 17:12	20m	- / -	CT1BWU	-5 / -	5	Partial capture
08-16 17:12	20m	- / -10	GW4AYJ	+2 / -	4	Partial capture
08-16 17:12	20m	- / -	OE6CLD	-3 / -	3	Partial capture
08-16 17:11	20m	-7 / -	<...>	+7 / -	2	✓ Closing fragment
08-16 16:42	20m	- / +4	R9CB	-12 / -	2	Partial capture
08-16 16:41	20m	-7 / -	<...>	-8 / -	7	✓ Closing fragment
08-16 16:26	20m	-11 / -	<...>	- / -	5	✓ Closing fragment
08-16 16:19	20m	-12 / -	<...>	- / -	2	✓ Closing fragment
08-16 16:10	20m	-15 / -	<...>	-14 / -	3	✓ Closing fragment
08-16 16:05	20m	-13 / -	EA3HYJ	-14 / -10	2	Partial capture
08-16 16:03	20m	- / -	EA8UE	-4 / -	3	Partial capture
08-16 16:03	20m	- / -	PD1ADA	-15 / -	5	Partial capture
08-16 16:01	20m	-12 / -	<...>	-9 / -	9	✓ Closing fragment
08-16 15:57	20m	-10 / -	<...>	-4 / -	3	✓ Closing fragment
08-16 15:51	20m	-11 / -	<...>	- / -	2	✓ Closing fragment
08-16 15:44	20m	-14 / -	<...>	-14 / -	4	✓ Closing fragment
08-16 15:30	20m	- / -14	IU6KQP	-6 / -	2	Partial capture
08-16 14:58	20m	-14 / -	F4LHR/P	- / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
000515  -9 1001  8D81RI M0LAD (x12)
142345  -9 1129  8D81RI <...> 73 (x2)
145200 -17 1129  CQ 8D81RI

20m

UTC    dB Audio  Message
210230 -13  820  8D81RI DL70ESSEN
210330 -13 1934  8D81RI <...> 73
210730  -4  821  8D81RI DL70ESSEN 73
211230  -8 2399  8D81RI <...> 73 (x2)
213130  +7  820  8D81RI DL70ESSEN 73 (x2)
213245 -13  820  CQ 8D81RI
213415 -15  820  DL70ESSEN 8D81RI RR73
213430 -15  822  8D81RI DL70ESSEN 73
213845 -16  820  DL70ESSEN 8D81RI RR73
213930  -4 3021  8D81RI <...> RR73
215030  -8  818  8D81RI PD7Z/P 73
221230 -14 1027  8D81RI EN35UKR RR73
101330 -21 1658  8D81RI DB1BAC/P 73

10m

UTC    dB Audio  Message
101030 -15 1029  <...> 8D81RI RR73 (x8)
102900  -9 1028  CQ 8D81RI
103500 -10 1028  <...> 8D81RI RR73 (x2)
104230 -10 1028  EN35UKR 8D81RI RR73
104730  -7 1028  CQ 8D81RI (x2)
064115 +12  606  8D81RI <...> 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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