JA9NFO — 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: PM86

Receiver-side FT8 activity involving JA9NFO, decoded by SO8OO in southeastern Poland. 158 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 27 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-03.

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 158 FT8 messages attributed to JA9NFO as the transmitting token by decoded message structure across 27 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 80 m (39%) and 40 m (13%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

158
Messages attributed
27
UTC dates decoded
44
Active 15-min windows
-11 dB
Estimated median S/N

Bands

80m · 61 40m · 21 20m · 76
First attributed message: 2026-06-06
Last attributed message: 2026-11-03 21:17 UTC

Observed FT8 message patterns

Attributed sample
158 messages
Active dates
27 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-18 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 35, moderate (-15 to -9 dB) 63, strong (≥ -8 dB) 60.

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 JA9NFO 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 JA9NFO

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
PM86 · 96 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,497 km (approx.)
Last such locator decoded
2026-11-03 21:17 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 UTCBandJA9NFO S/NCounterpartCounterpart S/NMsgsCapture
11-05 21:50 80m - / -24 IK4RSR -8 / - 3 Partial capture
11-05 21:13 80m - / - SP5AA +11 / - 2 Partial capture
11-05 21:12 80m - / -17 IT9EJW +6 / - 2 ✓ Closing fragment
11-05 20:42 40m - / -18 F4IVG -7 / - 3 Partial capture
11-04 21:43 80m - / -20 E75C -1 / - 4 ✓ Closing fragment
11-04 21:41 80m - / -11 OK1PI +7 / - 2 ✓ Closing fragment
11-04 21:34 80m - / -14 E75C +4 / - 2 Partial capture
11-03 21:16 160m - / -13 RD8X -10 / - 2 ✓ Closing fragment
11-03 20:50 80m - / - OM2WQ +5 / - 3 Partial capture
11-03 20:27 80m - / -16 OE8DDX +19 / - 2 ✓ Closing fragment
11-03 20:20 160m - / - IK0PHY -18 / - 2 Partial capture
11-03 20:18 160m - / -20 IZ0BVU -3 / - 2 ✓ Closing fragment
11-03 20:17 160m - / - IU2LVV -4 / - 2 Partial capture
11-03 20:14 160m - / -16 IZ6BRN +8 / - 4 ✓ Closing fragment
11-03 20:13 160m - / -16 OH7XI +4 / - 2 ✓ Closing fragment
11-02 21:50 40m - / -16 EA3AVS -10 / - 2 Partial capture
11-02 21:36 80m - / -15 OK4YL +15 / - 3 Partial capture
11-02 21:31 80m -4 / -13 E78W +10 / - 3 Partial capture
11-02 21:29 80m -14 / -8 OE8TED +13 / - 4 ✓ Closing observed
11-02 21:25 80m - / -16 R7HL -10 / - 3 Partial capture
11-02 21:22 80m -15 / -4 I0KMJ +9 / - 4 ✓ Closing observed
11-01 21:10 80m - / -18 YO2MAX +6 / - 2 ✓ Closing fragment
11-01 21:09 80m - / - I1RJP +13 / - 3 Partial capture
11-01 18:46 80m - / - OK2CLW +6 / - 2 Partial capture
11-01 18:37 80m - / -18 Z62NS -2 / - 11 Partial capture
10-31 20:48 160m - / - SP1D +16 / - 2 ✓ Closing fragment
10-31 20:42 160m - / -24 SP1D +13 / - 6 Partial capture
10-31 13:56 80m - / -2 RD5D +2 / - 3 ✓ Closing fragment
10-31 13:55 80m - / -21 RD7X -8 / - 2 Partial capture
10-31 13:54 80m - / -14 UA3DPM +1 / - 3 ✓ Closing fragment
10-31 13:53 80m - / - UA3D +7 / - 9 Partial capture
10-30 21:40 80m - / -15 9K2GR -8 / - 2 ✓ Closing fragment
10-30 13:33 80m - / - R4UA -6 / - 2 Partial capture
10-29 20:41 160m - / -25 HB9FAW +6 / - 4 Partial capture
10-29 20:40 80m - / -17 DK3WW +9 / - 8 ✓ Closing fragment
10-29 20:34 160m - / -17 PA3DUU -10 / - 2 ✓ Closing fragment
10-29 20:32 80m - / -11 LA3BO +7 / - 3 ✓ Closing fragment
10-29 20:31 80m - / -23 DJ1SL +9 / - 8 Partial capture
10-29 20:28 80m - / -21 G1XOW +4 / - 2 ✓ Closing fragment
10-29 20:22 160m - / -13 OH2IS +2 / - 2 ✓ Closing fragment
10-29 20:13 160m - / -18 OK2BPU -2 / - 2 ✓ Closing fragment
10-29 20:09 160m - / -24 SV1BLD -9 / - 3 Partial capture
10-29 20:07 80m -17 / -8 UR3HC -10 / - 4 ✓ Closing observed
10-29 20:04 160m - / - RN1CW -14 / - 2 ✓ Closing fragment
10-29 20:03 160m - / -13 SQ3M -12 / - 2 Partial capture
10-29 20:02 160m - / -22 IW4AOT +1 / - 2 ✓ Closing fragment
10-29 19:54 160m - / -12 F1PBZ -16 / - 2 Partial capture
10-29 19:52 160m - / - R6LE -10 / - 2 Partial capture
10-29 19:51 160m - / -13 IK0YUT -1 / - 6 Partial capture
10-29 19:50 160m - / -22 SP8VJV +4 / - 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
214115  +5 1652  JA9NFO OK1PI -11 (x2)
214315  +0 1456  JA9NFO E75C -20 (x4)
211200  +5  562  JA9NFO IT9EJW -17 (x2)
211300  +9 1851  JA9NFO SP5AA JO92 (x2)
214600 -16  198  JA9NFO T77NM 73
214730  -4 2402  JA9NFO IZ0BVU JN63
215030 -10 2096  JA9NFO IK4RSR -24 (x3)
40m 
UTC    dB Audio  Message
212600  -6 2739  JA9NFO GI7LOU -13 (x3)
212730 -15 1715  JA9NFO PD2PE JO21
212730  -3 1643  JA9NFO IU8RFW JN70
212730  -1 2739  JA9NFO GI7LOU 73
212800  -3 1643  JA9NFO IU8RFW JN70
210015 -24 1662  T77R JA9NFO R-13
212330 -24 1875  JA9NFO I1JZV JN44
215015 -12  792  JA9NFO EA3AVS -16 (x2)
215145 -16 2254  JA9NFO TC0TR -10
204200  -9 2608  JA9NFO F4IVG -18 (x3)
160m 
UTC    dB Audio  Message
201330  +4 1821  JA9NFO OH7XI -16 (x2)
201400  +8 2830  JA9NFO IZ6BRN JN63 (x4)
201700  -1  625  JA9NFO IU2LVV JN45 (x2)
201830  -3 1704  JA9NFO IZ0BVU -20 (x2)
202000 -17 1778  JA9NFO IK0PHY JN61 (x2)
211215 -11 2221  JA9NFO RN3TT -10
211615 -11 2842  JA9NFO RD8X -13 (x2)
10m 
UTC    dB Audio  Message
073130  -1 2283  JA9NFO HB9ACA -22
102300 -12  657  JA9NFO EA8WU -15
103700 -10  836  JA9NFO IU8ADS JN70 (x4)
104100 -13 2014  JA9NFO DN9SGE JO42 (x9)

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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