JA8CJY — 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: QN02

Receiver-side FT8 activity involving JA8CJY, decoded by SO8OO in southeastern Poland. 60 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-30.

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 60 FT8 messages attributed to JA8CJY as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (93%), followed by 40 m (7%). Most decodes (83%) 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

60
Messages attributed
5
UTC dates decoded
12
Active 15-min windows
-8 dB
Estimated median S/N

Bands

40m · 4 20m · 56
First attributed message: 2026-06-07
Last attributed message: 2026-08-30 15:25 UTC

Observed FT8 message patterns

Attributed sample
60 messages
Active dates
5 UTC dates
Estimated median S/N
-8 dB
Estimated 10th-90th percentile
-14 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 33.

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 JA8CJY in decoded directed-looking exchanges:

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 JA8CJY

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
QN02 · 29 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,163 km (approx.)
Last such locator decoded
2026-08-30 15:25 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 UTCBandJA8CJY S/NCounterpartCounterpart S/NMsgsCapture
11-06 07:43 10m - / - EB7CFU -11 / - 9 Partial capture
11-03 07:39 10m - / - SQ8DPZ -20 / - 2 ✓ Closing fragment
10-28 14:53 40m - / -12 R7DX -6 / - 3 ✓ Closing fragment
10-28 14:51 40m - / -17 HA7TM +5 / - 2 ✓ Closing fragment
10-28 14:19 80m - / -18 UA4FKT -11 / - 3 ✓ Closing fragment
10-25 13:20 80m - / -22 OH3NXW 0 / - 6 ✓ Closing fragment
10-25 13:17 80m - / - OH3NXW +4 / - 2 Partial capture
10-24 14:28 40m - / -14 9A1CCB -5 / - 3 ✓ Closing fragment
10-19 20:05 40m - / -8 LX1JH +14 / - 2 ✓ Closing fragment
10-19 20:01 40m - / -10 OK1UG +3 / - 4 ✓ Closing fragment
10-19 19:56 40m - / -19 HB9ELE +15 / - 9 ✓ Closing fragment
08-30 15:22 20m - / - G7EVY +1 / - 6 Partial capture
08-30 15:22 20m +4 / -9 M9YLR -3 / -12 5 ✓ Full exchange observed
08-30 15:22 20m +4 / - R3IAD - / -11 2 ✓ Closing fragment
08-30 15:21 20m - / - M0IEP -3 / - 3 Partial capture
08-30 15:18 20m -5 / - YL2TM - / -12 2 ✓ Closing fragment
08-30 15:03 20m -6 / - YU7DES - / -11 2 ✓ Closing fragment
08-30 15:02 20m -4 / -7 OE9ITU -3 / -11 5 ✓ Full exchange observed
08-30 15:00 20m -4 / - UR4IAF - / -9 2 ✓ Closing fragment
08-30 14:59 20m -5 / -13 RM4N -12 / -7 4 ✓ Full exchange observed
08-30 14:58 20m -6 / -15 F5TA +26 / -11 4 ✓ Full exchange observed
08-30 14:57 20m -6 / - RX6LN - / -10 2 ✓ Closing fragment
08-30 14:55 20m -6 / - LA3NUA - / -9 2 ✓ Closing fragment
08-30 14:54 20m - / - M0IEP +10 / - 4 Partial capture
08-30 14:52 20m -6 / - F4HTA - / - 2 Partial capture
08-29 15:36 20m - / - R4WH -2 / - 2 Partial capture
08-29 15:35 20m - / -19 EA2EI/P +7 / - 4 ✓ Closing fragment
08-29 15:34 20m - / -20 EB3JT +11 / - 3 ✓ Closing fragment
08-28 15:03 40m - / -10 R2AVW -3 / - 2 Partial capture
08-25 19:32 40m - / -21 RL2F -8 / - 6 Partial capture
08-23 19:44 40m - / -7 SP6JIU +26 / - 2 ✓ Closing fragment
08-23 19:31 40m - / - UB3ANV -14 / - 2 Partial capture
08-23 19:30 40m - / -10 DK7ZT -1 / - 4 ✓ Closing fragment
08-23 19:28 40m - / -16 LZ2BC +1 / - 3 ✓ Closing fragment
08-23 19:26 40m - / -22 LB7ZG +6 / - 3 ✓ Closing fragment
08-23 19:25 40m - / -17 9A4ZM +11 / - 2 Partial capture
08-23 19:24 40m - / -15 RX3ASQ -11 / - 3 ✓ Closing fragment
08-23 18:49 40m - / - OZ1KEF 0 / - 2 Partial capture
08-23 18:43 40m - / - LB7ZG +9 / - 2 Partial capture
08-23 18:39 40m - / -18 R5BS -16 / - 4 ✓ Closing fragment
08-23 18:37 40m - / -17 ON4AOI +8 / - 3 ✓ Closing fragment
08-23 15:11 20m -12 / - LZ1BT -6 / -12 6 Partial capture
08-23 15:08 20m - / - IK2ZJR +1 / - 2 Partial capture
08-23 15:04 20m -8 / -13 IU4WSH -18 / - 3 ✓ Closing observed
08-23 15:01 20m -9 / - BG9SIN - / -7 2 Partial capture
08-23 14:58 20m - / - OH7FQH -6 / - 2 ✓ Closing fragment
08-19 17:14 20m - / -18 IS0LYN +3 / - 3 ✓ Closing fragment
08-19 17:12 20m - / - EA5ZM -6 / - 2 Partial capture
08-19 17:06 20m - / - GI4TMB +3 / - 2 Partial capture
08-19 16:57 20m - / - EA8AQV -18 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
073900 -20 2125  JA8CJY SQ8DPZ +11 (x2)
074330  -9 1829  JA8CJY EB7CFU IM77 (x9)
40m 
UTC    dB Audio  Message
200130  +3 2659  JA8CJY OK1UG JN89 (x3)
200400  +5 2659  JA8CJY DK3ME JO50
200430  +6 2659  JA8CJY RV6AVU R-11
200530 +17 2659  JA8CJY LX1JH R-08 (x2)
142845  -3 1965  JA8CJY 9A1CCB -14 (x3)
145145  +6 1889  JA8CJY HA7TM -17 (x2)
145315  -7 1627  JA8CJY R7DX KN84 (x3)
80m 
UTC    dB Audio  Message
131700  +7  378  JA8CJY OH3NXW KP11 (x8)
141945 -11 2153  JA8CJY UA4FKT LO23 (x3)
20m 
UTC    dB Audio  Message
152230  -6 2357  JA8CJY M9YLR IO83
152230  -2 2932  JA8CJY G7EVY IO83
152245  +4 2932  R3IAD JA8CJY RR73
152300  -2 2357  JA8CJY M9YLR IO83
152300  -4 2932  JA8CJY G7EVY IO83
152315  +4 2932  M9YLR JA8CJY -12
152330  -1 2357  JA8CJY M9YLR R-09
152330  +6 2932  JA8CJY G7EVY IO83
152400  -4 2357  JA8CJY M9YLR 73
152400  +1 2932  JA8CJY G7EVY IO83 (x3)
152515  +4 2932  CQ JA8CJY QN02
152600  +4 2933  JA8CJY DL6DK -10
152700  +0 2932  JA8CJY M0IEP IO91

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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