R0JAC — 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: Asiatic Russia Most frequent locator attributed to this token: PO41

Receiver-side FT8 activity involving R0JAC, decoded by SO8OO in southeastern Poland. 8 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-06-16.

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 8 FT8 messages attributed to R0JAC as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

20m · 8

First attributed message: 2026-06-12
Last attributed message: 2026-06-16 22:41 UTC

Observed FT8 message patterns

Attributed sample: 8 messages
Active dates: 2 UTC dates
Estimated median S/N: -13 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 1.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with R0JAC in decoded directed-looking exchanges:

IZ5UFW · Italy OK2CNI · Czech Republic R3UAX · European Russia RA3P · European Russia LA3BO · Norway R2SN · European Russia R3DAJ · European Russia R5AV · European Russia R6OE · European Russia R7DX · European Russia RA6FC · European Russia UA3GDJ · European Russia

Most frequent locator attributed to R0JAC

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: PO41 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,815 km (approx.)
Last such locator decoded: 2026-06-16 22:25 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	R0JAC S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 15:31	40m	- / -15	RA6FC	-9 / -	2	✓ Closing fragment
11-05 15:12	40m	- / -	R3DAJ	-6 / -	2	✓ Closing fragment
11-02 13:27	40m	- / -	UA4FKT	+3 / -	3	Partial capture
10-31 14:42	40m	- / -18	R5AV	-1 / -	4	✓ Closing fragment
10-31 14:39	40m	- / -	RL3QGD	-6 / -	3	Partial capture
10-31 14:36	40m	- / -20	R6OE	-7 / -	6	✓ Closing fragment
10-29 14:53	40m	- / -15	LA3BO	+2 / -	2	✓ Closing fragment
10-29 14:42	40m	- / -	RL3QGD	-12 / -	4	Partial capture
10-29 14:12	40m	- / -	RO2X	-16 / -	2	Partial capture
10-29 14:00	40m	- / -	LA3BO	-4 / -	2	Partial capture
10-29 13:47	80m	- / -16	RU9F	-13 / -	3	✓ Closing fragment
10-29 13:45	80m	- / -	RA1AOB	-2 / -	19	Partial capture
10-27 07:05	10m	- / -	RA4NCC	+4 / -	2	Partial capture
10-22 14:13	40m	- / -	RL3QGD	-16 / -	2	Partial capture
10-22 14:11	40m	- / -	UA3GDJ	-4 / -	2	✓ Closing fragment
10-12 15:30	40m	- / -19	RM4N	-13 / -	3	Partial capture
10-07 14:51	40m	- / -16	UA4FKT	-4 / -	2	Partial capture
09-23 14:11	40m	- / -15	R7DX	-8 / -	3	✓ Closing fragment
09-23 13:52	40m	- / -	LA7DFA	-2 / -	2	Partial capture
09-23 13:51	40m	- / -17	UB8A	-10 / -	2	✓ Closing fragment
08-30 23:32	20m	- / -15	OK2CNI	+12 / -	2	✓ Closing fragment
08-27 21:27	20m	- / -	S57LU	-3 / -	3	Partial capture
08-27 04:08	20m	- / -6	R3UAX	+8 / -	2	✓ Closing fragment
08-23 23:46	20m	- / -25	IZ5UFW	+4 / -	2	✓ Closing fragment
08-16 07:58	20m	- / -12	RA3P	-3 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
134830 -16 1717  R0JAC RU9F 73
134830  +1 1564  R0JAC RA1AOB KO59 (x13)
160145 -24 2155  R0JAC R0AH RR73

40m

UTC    dB Audio  Message
144315  +0  632  R0JAC R5AV -18 (x3)
152545  -9 1292  R0JAC LZ26IPA -18
132715  +0  788  R0JAC UA4FKT LO23 (x3)
150800 -13 2542  R0JAC RV4LD -16
151200  -6 1739  R0JAC R3DAJ KO85 (x2)
153130  -9  983  R0JAC RA6FC R-15 (x2)
153645  -9  538  R0JAC RX7O -20
154545 -22 1993  R0JAC R1FB KO48
154615  +3  588  R0JAC R2SN RR73

10m

UTC    dB Audio  Message
070530  +3 2931  R0JAC RA4NCC LO68 (x2)

20m

UTC    dB Audio  Message
075800  -4  514  R0JAC RA3P -12 (x2)
001245 -23 1874  R0JAC EC3A -20
234615  +5  771  R0JAC IZ5UFW R-25 (x2)
234645  +4 2134  R0JAC IQ4JO JN63
040800  +8  792  R0JAC R3UAX -06 (x2)
212345  -6  801  R0JAC F4MBU JN23
212615 -10  921  R0JAC I2SDD -18
212715  +0  980  R0JAC S57LU JN76 (x3)
233245 +12 2399  R0JAC OK2CNI -15 (x2)

CW

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

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee