DO5RBB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO40

Receiver-side FT8 activity involving DO5RBB, decoded by SO8OO in southeastern Poland. 1,263 FT8 messages attributed to this token as transmitter, on 80m, 10m, across 47 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.

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 1,263 FT8 messages attributed to DO5RBB as the transmitting token by decoded message structure across 47 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%), followed by 10 m (0%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (62%); the estimated median was -6 dB.

Overview

1,263

Messages attributed

UTC dates decoded

141

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 1,262 10m · 1

First attributed message: 2026-06-07
Last attributed message: 2026-09-20 21:07 UTC

Observed FT8 message patterns

Attributed sample: 1,263 messages
Active dates: 47 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -16 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 140, moderate (-15 to -9 dB) 343, strong (≥ -8 dB) 780.

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 DO5RBB in decoded directed-looking exchanges:

DF1IH · Fed. Rep. of Germany ×2 JE6WOQ · Japan ×2 EA3AGF · Spain 3Z6I · Poland 5P5Z · Denmark 8S7DL · Sweden 9A9N · Croatia DA0LH · Fed. Rep. of Germany DA0O · Fed. Rep. of Germany DA0WWA · Fed. Rep. of Germany DA6CGN · Fed. Rep. of Germany DA6HF · 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 DO5RBB

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: JO40 · 875 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 911 km (approx.)
Last such locator decoded: 2026-09-20 21:07 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	DO5RBB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 21:02	80m	-12 / -	DO5AX	- / -	2	✓ Closing fragment
09-20 20:59	80m	-6 / +6	DL0ABT	+7 / -6	4	✓ Full exchange observed
09-20 20:28	80m	-14 / -	SK5AD	- / -	2	Partial capture
09-17 21:00	80m	-6 / -10	3Z100PKP	+12 / -10	2	Partial capture
09-15 21:06	80m	-8 / -	DF2UU	- / -	2	Partial capture
09-15 20:54	80m	- / -	DO9ST	-12 / -	3	Partial capture
09-15 20:52	80m	-20 / -	RD0L/3	- / -6	3	Partial capture
09-15 20:51	80m	- / -16	LZ123RF	+12 / -	4	Partial capture
09-15 20:46	80m	-14 / -	3Z100PKP	- / -	6	Partial capture
09-15 20:20	80m	-12 / -	DJ6YX	- / -	7	Partial capture
09-15 20:18	80m	-14 / -6	3Z100PKP	+2 / +2	3	Partial capture
09-14 20:54	80m	-12 / -	PH82LIB	- / -10	2	Partial capture
09-14 20:51	80m	-12 / -	DL2ALY	+18 / -	4	✓ Closing observed
09-13 21:16	80m	-3 / -	DL1RWN	- / -	10	Partial capture
09-13 21:15	80m	-10 / -	DJ3ZF	-21 / -	3	✓ Closing observed
09-13 21:09	80m	-7 / -	DL1RWN	- / -	7	Partial capture
09-13 21:06	80m	-7 / -	DL1JEL	- / -	2	Partial capture
09-13 21:05	80m	- / -	DM6MAR	-10 / -	2	✓ Closing fragment
09-13 21:03	80m	- / +10	DH3KAR	-4 / -	2	Partial capture
09-13 21:01	80m	- / -12	HF9T	0 / -	2	✓ Closing fragment
09-10 20:42	80m	-7 / -9	LY1SR	+2 / -3	7	✓ Full exchange observed
09-10 20:39	80m	-14 / -	DO6WA	-1 / -	3	✓ Closing observed
09-10 20:37	80m	-4 / -	PE1IWT	-4 / +8	5	✓ Full exchange observed
09-10 20:35	80m	-12 / -	LB5AK	- / -	4	Partial capture
09-10 20:32	80m	-8 / -12	DL9MDW	-21 / -18	5	✓ Full exchange observed
09-10 20:29	80m	-6 / -	DL1ESZ	-12 / +3	6	✓ Closing observed
09-10 20:25	80m	-4 / +1	DA0O	-2 / +2	8	✓ Full exchange observed
09-10 20:20	80m	-4 / -	HB3YPJ	- / -	3	Partial capture
09-10 20:17	80m	-4 / -	OH2BU	- / -	4	Partial capture
09-10 20:16	80m	-8 / -	M0IOY	- / -13	2	✓ Closing fragment
09-10 20:14	80m	-2 / -	SP5DFK	-3 / -13	4	✓ Closing observed
09-10 20:12	80m	-9 / -	OH2BU	- / -	4	Partial capture
09-10 20:10	80m	-11 / -	DK2MAX	- / -1	3	✓ Closing fragment
09-10 20:05	80m	-5 / -6	DM3ER	-4 / +10	3	Partial capture
09-10 20:02	80m	-6 / -	LZ936BA	- / -	2	Partial capture
09-10 20:01	80m	-10 / -	SN40KZE	- / -	2	Partial capture
09-09 21:10	80m	-9 / -	DL1KYF/P	- / -	4	Partial capture
09-09 21:08	80m	-12 / -	DG0CFK	- / -	2	Partial capture
09-09 20:59	80m	-15 / -	DD9PN	- / -6	4	✓ Closing fragment
09-09 20:57	80m	-2 / -	DL1DUO	- / -	2	Partial capture
09-09 20:52	80m	-22 / -	DC6KW	- / -	4	Partial capture
09-09 20:51	80m	-21 / -	SQ100PKP	- / +9	2	Partial capture
09-09 20:50	80m	-20 / +7	DL3VL	+4 / -	4	✓ Full exchange observed
09-09 20:46	80m	-16 / -	SQ100PKP	- / -	2	Partial capture
09-09 20:44	80m	-14 / -	5Z4VJ	- / -	2	Partial capture
09-09 20:41	80m	-14 / 0	DL9DX	+11 / -	4	✓ Closing observed
09-09 20:38	80m	-18 / -	DO9FSE	- / -	2	Partial capture
09-09 20:36	80m	-18 / -8	HB9JOE	-11 / +4	5	✓ Full exchange observed
09-09 20:33	80m	-19 / +2	DL8YBL	-2 / -	6	✓ Closing observed
09-09 20:31	80m	-21 / -	DF8AA	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
210030 +12 1029  DO5RBB 3Z100PKP -10
210045  -6 1029  3Z100PKP DO5RBB R-10
210330  -8 1079  DO8JB DO5RBB JO40
202630 +19 2751  DO5RBB SO100PKP -05
202845 -13 1597  SK5AD DO5RBB JO40 (x2)
205900  -5 1388  DL0ABT DO5RBB JO40
205915  +5  683  DO5RBB DL0ABT +06
205930  -7 1387  DL0ABT DO5RBB R-06
205945  +9  683  DO5RBB DL0ABT RR73
210230 -11 1538  DO5AX DO5RBB JO40 (x2)
210430 -12 1537  DO8JB DO5RBB JO40
210630 -12 1538  LA3CSA DO5RBB JO40
210715  -7 1538  DO5SMH DO5RBB JO40

40m

UTC    dB Audio  Message
061030 -18 1542  DO5RBB 9A4ZM JN86

10m

UTC    dB Audio  Message
122045 -16 1490  DO5RBB EA3AGF RR73
122100 -16  977  EA3AGF DO5RBB 73
101330  -8 2215  DO5RBB LZ1JZ -18 (x3)
090030 -10  518  DO5RBB M0BEW -07

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.

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