JA0UUA — 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: Japan Most frequent locator attributed to this token: PM85

Receiver-side FT8 activity involving JA0UUA, decoded by SO8OO in southeastern Poland. 65 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-09.

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 65 FT8 messages attributed to JA0UUA as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 40 m (6%). 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 (60%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

40m · 4 20m · 61

First attributed message: 2026-06-06
Last attributed message: 2026-10-09 20:58 UTC

Observed FT8 message patterns

Attributed sample: 65 messages
Active dates: 4 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -13 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 39.

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 JA0UUA in decoded directed-looking exchanges:

T77R · San Marino TA2VUZ · Asiatic Turkey

Most frequent locator attributed to JA0UUA

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: PM85 · 61 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,586 km (approx.)
Last such locator decoded: 2026-10-09 20:56 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	JA0UUA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-09 20:57	40m	- / -	UX1VT	-8 / -	2	Partial capture
10-09 20:55	40m	-13 / -	T77R	-9 / -7	4	✓ Closing observed
10-04 21:51	40m	- / -	UR9QQ	-15 / -	2	Partial capture
10-04 21:49	40m	- / -5	TA2VUZ	-10 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
214930 -12 1964  JA0UUA TA2VUZ -05 (x2)
215100 -14 1252  JA0UUA UR9QQ KN77 (x2)
205530 -14  673  T77R JA0UUA PM85 (x3)
205645  -9 1140  JA0UUA T77R RR73
205715  -9  673  JA0UUA UX1VT KN68
205715 -24 2027  JA0UUA RZ4FWA LO23
205830 -11 2603  IU8RFW JA0UUA -16
205845  -8  674  JA0UUA UX1VT KN68

CW

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

Explore CW reception at SO8OO

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