JA5NLN — 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: PM64

Receiver-side FT8 activity involving JA5NLN, decoded by SO8OO in southeastern Poland. 34 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-27.

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 34 FT8 messages attributed to JA5NLN as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (74%), followed by 20 m (26%). 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 weak S/N range (68%); the estimated median was -18 dB.

Overview

34
Messages attributed
12
UTC dates decoded
15
Active 15-min windows
-18 dB
Estimated median S/N

Bands

80m · 25 20m · 9
First attributed message: 2026-06-08
Last attributed message: 2026-10-27 21:14 UTC

Observed FT8 message patterns

Attributed sample
34 messages
Active dates
12 UTC dates
Estimated median S/N
-18 dB
Estimated 10th-90th percentile
-24 to -13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 11, 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 JA5NLN 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 JA5NLN

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
PM64 · 27 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,453 km (approx.)
Last such locator decoded
2026-10-27 21:14 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 UTCBandJA5NLN S/NCounterpartCounterpart S/NMsgsCapture
11-03 20:39 80m - / -19 OE8DDX +15 / - 2 ✓ Closing fragment
11-02 21:26 80m - / -24 OK4YL +19 / - 3 ✓ Closing fragment
10-31 21:23 80m - / -16 4O4A +6 / - 2 ✓ Closing fragment
10-29 22:09 40m - / - EA6ABF +5 / - 2 ✓ Closing fragment
10-29 22:02 40m - / -19 EA6ABF +10 / - 4 Partial capture
10-28 21:05 160m - / -15 RU3UR +2 / - 3 ✓ Closing fragment
10-28 21:03 160m - / -19 R5WW -1 / - 2 ✓ Closing fragment
10-28 20:56 160m - / -14 LZ1KU -1 / - 2 Partial capture
10-28 20:51 160m - / -17 EC6AAE +1 / - 3 ✓ Closing fragment
10-25 21:11 80m -24 / -13 4O4A +4 / - 4 ✓ Closing observed
10-25 20:46 80m - / -19 OH6VC +12 / - 6 ✓ Closing fragment
10-25 20:29 80m - / -22 OM3TWM -11 / - 2 ✓ Closing fragment
10-25 20:25 80m - / -16 ON6AA +5 / - 6 ✓ Closing fragment
10-25 20:25 80m - / -14 4O4A +14 / - 2 ✓ Closing fragment
10-24 21:43 80m -18 / - OD5ZZ - / -13 5 Partial capture
10-24 21:38 80m -13 / - OD5ZZ - / - 2 Partial capture
10-24 21:30 80m -16 / - OD5ZZ - / - 3 Partial capture
10-21 21:19 40m - / - R6DRG -11 / - 5 Partial capture
10-21 20:35 80m - / -10 UN3P -18 / - 2 ✓ Closing fragment
10-18 21:24 80m -17 / -20 LZ1GC +2 / - 5 ✓ Closing observed
10-18 21:10 160m - / - SV9CVY -9 / - 2 ✓ Closing fragment
10-18 21:02 160m - / -20 SV9CVY -6 / - 4 Partial capture
10-17 20:55 160m - / -18 E73S +5 / - 3 ✓ Closing fragment
10-17 20:48 160m - / -12 4J3DJ -8 / - 2 ✓ Closing fragment
10-14 21:14 80m - / -24 HA1BF +8 / - 7 Partial capture
10-14 21:05 80m - / -16 ON4IQ +6 / - 2 ✓ Closing fragment
10-14 21:03 80m - / - E77EA 0 / - 2 Partial capture
10-14 20:59 80m - / - EW8DU -6 / - 3 Partial capture
10-14 20:59 80m - / -12 IK0PHY -2 / - 3 ✓ Closing fragment
10-14 20:57 80m - / - OK1PI +1 / - 7 Partial capture
10-14 20:52 80m -23 / - ON4IQ -1 / - 2 ✓ Closing observed
10-13 21:14 80m - / - UX1AA -6 / - 4 Partial capture
10-13 21:10 80m - / -16 EW6BZ +6 / - 5 ✓ Closing fragment
10-13 21:09 80m - / - UX1AA -10 / - 2 Partial capture
10-13 21:01 80m - / -16 EW6BZ +14 / - 3 Partial capture
10-13 20:34 80m - / - UX1AA -3 / - 4 Partial capture
10-12 21:07 80m -12 / -17 YU0U +5 / -15 4 ✓ Full exchange observed
10-12 20:47 160m - / - UT6HN +7 / - 2 Partial capture
10-09 21:20 40m - / -13 T77R -8 / - 2 ✓ Closing fragment
10-09 20:49 80m - / -13 UF4S -7 / - 3 ✓ Closing fragment
10-04 21:02 80m - / -14 OM3TWM -2 / - 2 ✓ Closing fragment
10-04 20:51 160m - / -17 LY2SA +13 / - 2 Partial capture
10-04 20:43 160m - / -16 UG4L -6 / - 2 Partial capture
10-04 20:22 80m - / -14 DJ7M +16 / - 2 ✓ Closing fragment
10-04 20:20 80m - / -18 OT7K +12 / - 2 ✓ Closing fragment
10-03 21:16 80m -24 / -25 HB9BLQ +12 / - 3 ✓ Closing observed
10-03 20:56 80m - / -16 ON4IQ +17 / - 2 ✓ Closing fragment
10-01 20:47 80m - / -10 UN0GY -13 / - 2 ✓ Closing fragment
10-01 20:43 80m - / -18 5B4AMM +3 / - 3 ✓ Closing fragment
09-30 21:56 40m - / -18 LA3BO 0 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
211115 -24 1727  4O4A JA5NLN PM64 (x2)
211200  +6 2673  JA5NLN 4O4A -13 (x2)
211345 -23 1727  SM5A JA5NLN PM64
211600  -1  752  JA5NLN SM5A -24
211400 -24 1094  LX2A JA5NLN PM64
212330  +7 2552  JA5NLN 4O4A -16 (x2)
212615 +17 3023  JA5NLN OK4YL -24 (x3)
212745 -22 1503  JA5NLN TA1MB KN41
203900 +15 2393  JA5NLN OE8DDX -19 (x2)
40m 
UTC    dB Audio  Message
212045  -8 1350  JA5NLN T77R -13 (x2)
211945  -9 2194  JA5NLN R6DRG KN96 (x5)
214200  -8  386  JA5NLN 5B/ES5RY -13
214230 -10  387  JA5NLN RR73; JH2VVH <...> -06
220230  +7 2581  JA5NLN EA6ABF -19 (x6)
160m 
UTC    dB Audio  Message
210400  -5 1435  JA5NLN SV9CVY -20 (x3)
205130  +0 2188  JA5NLN EC6AAE -17 (x3)
205630  -5 1594  JA5NLN LZ1KU -14 (x2)
205730  +7 1155  JA5NLN R5WW -14 (x3)
210530  +4 1950  JA5NLN RU3UR -15 (x3)
204815  -6 1929  JA5NLN G0BNR -24
20m 
UTC    dB Audio  Message
221445  -9 1799  JA5NLN SV5BYP -14 (x3)

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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