YH1AA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Indonesia Most frequent locator attributed to this token: OI33

Receiver-side FT8 activity involving YH1AA, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-10 and 2026-07-12.

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 26 FT8 messages attributed to YH1AA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (100%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (100%); the estimated median was -24 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-24 dB

Estimated median S/N

Bands

20m · 26

First attributed message: 2026-07-10
Last attributed message: 2026-07-12 15:14 UTC

Observed FT8 message patterns

Attributed sample: 26 messages
Active dates: 3 UTC dates
Estimated median S/N: -24 dB
Estimated 10th-90th percentile: -24 to -21 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 YH1AA in decoded directed-looking exchanges:

F4LNM · France ×2 R3PBR · European Russia ×2 CT7AUT · Portugal ×2 DL7KI · Fed. Rep. of Germany ×2 G0VLF · England ×2 ON1PT · Belgium ×2 A41ZZ · Oman EA3EHQ · Spain IZ0RPS · Italy PD5DJ · Netherlands RD7LO · European Russia UA3GU · European Russia

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 YH1AA

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: OI33 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 10,219 km (approx.)
Last such locator decoded: 2026-07-12 15:14 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	YH1AA S/N	Counterpart	Counterpart S/N	Msgs	Capture
07-12 22:33	40m	- / -16	R2BQM	-22 / -	2	Partial capture
07-12 21:09	20m	- / -6	RD6OZ	-18 / -	2	Partial capture
07-12 21:06	20m	- / -	DH9JB	-21 / -	2	Partial capture
07-12 21:04	20m	- / -19	EA5L	-8 / -	2	Partial capture
07-12 20:42	20m	- / -	EA7KO	-2 / -	2	✓ Closing fragment
07-12 20:28	20m	- / -13	SP1EXD	-12 / -	7	✓ Closing fragment
07-12 20:23	20m	- / -17	MI7IHF	-16 / -	2	✓ Closing fragment
07-12 20:18	20m	- / -	F4LKA	-17 / -	3	Partial capture
07-12 20:03	20m	- / -15	EA8NL	-17 / -	3	Partial capture
07-12 19:58	20m	- / -	EA8NL	-19 / -	4	Partial capture
07-12 19:47	20m	- / +3	G8SHF	+11 / -	3	Partial capture
07-12 19:47	20m	- / -10	EA7GHD	-11 / -	5	✓ Closing fragment
07-12 19:37	20m	- / -	MI7RDK	-5 / -	2	Partial capture
07-12 19:34	20m	- / -	MI7RDK	-4 / -	2	Partial capture
07-12 19:22	20m	- / -	EA3IGL	-23 / -	2	Partial capture
07-12 19:20	20m	- / -	M7LDP	-17 / -	5	Partial capture
07-12 19:17	20m	- / -5	ON3BEN	-17 / -	3	✓ Closing fragment
07-12 19:10	20m	- / -15	UR5HMF	-10 / -	5	✓ Closing fragment
07-12 19:06	20m	- / -13	EA1FWJ	-17 / -	3	Partial capture
07-12 19:02	20m	- / -14	DL2RPN	-7 / -	3	✓ Closing fragment
07-12 19:01	40m	- / -17	9A9N	-7 / -	4	Partial capture
07-12 18:57	20m	- / -	DL1MKW	-19 / -	3	Partial capture
07-12 18:53	40m	- / -17	R2FDU	-12 / -	2	Partial capture
07-12 18:51	40m	- / -22	UW2ZO	-1 / -	3	✓ Closing fragment
07-12 18:50	40m	- / -15	HB9EFK	-6 / -	3	Partial capture
07-12 18:41	20m	- / -14	UA3ZZ	-8 / -	2	Partial capture
07-12 18:37	20m	- / -7	EA7VJ	-17 / -	2	Partial capture
07-12 18:37	20m	- / -	UA3ZZ	-10 / -	2	Partial capture
07-12 18:31	20m	- / -	RK6AAC	+6 / -	4	Partial capture
07-12 18:28	20m	- / -13	G0VLF	-4 / -	3	✓ Closing fragment
07-12 18:13	20m	- / -5	SP3JHY	+7 / -	7	✓ Closing fragment
07-12 18:07	20m	- / -14	R6ZEJ	-7 / -	3	✓ Closing fragment
07-12 18:06	20m	- / -17	G0RIF	-6 / -	4	Partial capture
07-12 17:59	20m	- / -	EA3IBK	-20 / -	2	Partial capture
07-12 17:48	20m	- / -19	R7GA	-18 / -	2	Partial capture
07-12 17:44	20m	- / -9	EA3DKP	-6 / -	4	✓ Closing fragment
07-12 17:38	20m	- / -17	RG7O	-3 / -	2	✓ Closing fragment
07-12 17:25	20m	- / -13	S52TW	-8 / -	2	Partial capture
07-12 17:22	20m	- / -	EB4EYD	-2 / -	2	✓ Closing fragment
07-12 17:17	20m	- / -14	S52TW	-3 / -	2	Partial capture
07-12 17:13	40m	- / -	SP7IIX	-4 / -	2	Partial capture
07-12 16:55	40m	- / -	RQ6Z	0 / -	2	Partial capture
07-12 16:51	40m	- / -	IZ0CLP	-13 / -	3	Partial capture
07-12 16:50	40m	- / -5	DL6EL	-4 / -	2	✓ Closing fragment
07-12 16:50	40m	- / -11	OE5ROR	-12 / -	16	Partial capture
07-12 16:50	40m	- / -	OK2CLW	-16 / -	3	Partial capture
07-12 16:45	40m	- / -11	R6ZQ	-1 / -	5	✓ Closing fragment
07-12 16:45	40m	- / -	SP5ENM	-11 / -	2	Partial capture
07-12 16:43	20m	- / -	HG1DRC	-7 / -	5	Partial capture
07-12 16:42	40m	- / -	HA3YA	-21 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
185345 -14 2107  YH1AA R2FDU -17 (x2)
185715 -16 1540  YH1AA HB9ALO JN45
190115  -4  700  YH1AA 9A9N -17 (x4)
190645 -15 1192  YH1AA F8AGD RR73
191830  +1 2645  YH1AA SP6DT JO80
193030 -16 1724  YH1AA EA8UP RR73
215945 -14  878  YH1AA SV3GKU -15
223315 -21 1732  YH1AA R2BQM -16
223345 -10  239  YH1AA SM7RHI JO75
223345  -8 2752  YH1AA R4ZZ -07
223415 -24 1732  YH1AA R2BQM -16

20m

UTC    dB Audio  Message
202915 -11 1872  YH1AA SP1EXD R-13 (x5)
204215  +1 2871  YH1AA EA7KO IM67 (x2)
205845 -13 1455  YH1AA SP4WSL JO93
210415  -4 1334  YH1AA EA5L -19 (x2)
210615 -19 1874  YH1AA DH9JB JO31 (x2)
210945 -18 1873  YH1AA RD6OZ KN98 (x2)
212115 -24 1797  YH1AA HA3FMR 73

80m

UTC    dB Audio  Message
182845  +2 1181  YH1AA DL6NDN JO50 (x2)

10m

UTC    dB Audio  Message
084145 -19 1490  YH1AA SV4OZF -15
085615 -20 2085  YH1AA EA3SD JN01 (x2)
090045  -6  794  YH1AA IU5NWT -13 (x5)
090645 -17  795  YH1AA IZ5ILK JN63
091915 -12  894  YH1AA PD5DJ JO22 (x5)
100115 -12  795  YH1AA IZ0RPS 73

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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