JS1NDM — 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: PM95

Receiver-side FT8 activity involving JS1NDM, decoded by SO8OO in southeastern Poland. 35 FT8 messages attributed to this token as transmitter, on 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-10-29.

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 35 FT8 messages attributed to JS1NDM as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

35
Messages attributed
7
UTC dates decoded
11
Active 15-min windows
-11 dB
Estimated median S/N

Bands

40m · 35
First attributed message: 2026-08-22
Last attributed message: 2026-10-29 20:54 UTC

Observed FT8 message patterns

Attributed sample
35 messages
Active dates
7 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-19 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 12.

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 JS1NDM 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 JS1NDM

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
PM95 · 9 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,693 km (approx.)
Last such locator decoded
2026-09-28 20:34 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 UTCBandJS1NDM S/NCounterpartCounterpart S/NMsgsCapture
11-05 20:35 40m - / - EA3EDU -9 / - 5 Partial capture
11-05 20:31 80m - / -6 UX5UO -1 / - 4 Partial capture
11-05 20:25 40m - / -16 SV1DZB -12 / - 3 ✓ Closing fragment
11-01 06:52 40m - / 0 IU3MAG -7 / - 3 ✓ Closing fragment
10-31 20:21 40m - / -12 IT9ZGW -14 / - 9 ✓ Closing fragment
10-25 20:46 40m - / - 9A4ZM -20 / - 2 Partial capture
10-25 20:42 40m - / -21 UA1CEI +5 / - 6 ✓ Closing fragment
10-15 19:52 80m - / -20 ON4IQ +18 / - 2 ✓ Closing fragment
10-02 20:13 40m - / -16 OT8P -1 / - 3 ✓ Closing fragment
09-28 20:49 80m - / -24 OK4YL +22 / - 3 ✓ Closing fragment
09-28 20:45 80m - / -13 ER4KAA +4 / - 2 ✓ Closing fragment
09-28 20:40 40m - / - IW2FUT +14 / - 2 Partial capture
09-28 20:37 40m - / - F4EAR +1 / - 6 Partial capture
09-28 20:36 40m -7 / -15 LB7ZG +6 / - 6 ✓ Closing observed
09-28 20:34 40m -9 / - 4O4DB - / - 3 ✓ Closing fragment
09-28 20:33 40m -7 / - IS0LJG -13 / -25 4 Partial capture
09-28 20:32 40m - / - LB7ZG +5 / - 3 Partial capture
09-28 20:29 40m -8 / -9 EA7KBX -1 / -25 7 ✓ Full exchange observed
09-28 20:11 40m - / - IZ5IMD +19 / - 2 Partial capture
09-28 20:10 40m - / - LB7ZG -4 / - 2 Partial capture
09-28 20:10 40m - / - UB6OCP -1 / - 3 Partial capture
09-28 20:09 40m -19 / - LZ1GC -20 / -13 3 ✓ Closing observed
09-28 20:08 40m - / - IW2FUT -3 / - 4 Partial capture
09-28 20:08 40m - / - RD3FY +5 / - 3 Partial capture
09-28 20:06 40m -24 / - OM7AMA - / -12 2 Partial capture
09-21 20:31 40m - / - F5PBG +3 / - 2 Partial capture
09-21 20:30 40m -11 / - SP5MXZ - / -10 2 ✓ Closing fragment
09-21 20:29 40m -6 / - SP5DFG - / -8 2 ✓ Closing fragment
09-21 20:28 40m - / -17 EA1AUO -12 / - 3 Partial capture
09-21 20:28 40m -9 / -1 HB9ELE +10 / -13 5 ✓ Full exchange observed
09-21 20:27 40m -14 / -9 DL7ACA +12 / - 3 ✓ Closing observed
09-21 20:27 40m -6 / +1 UA9CR -6 / +7 5 Partial capture
09-21 20:25 40m -11 / -2 9A60CBM +12 / -6 4 Partial capture
09-19 20:44 40m -10 / - CN8NS - / - 4 Partial capture
09-13 20:29 40m - / - PD0LBY -8 / - 3 Partial capture
09-13 20:24 40m -19 / -15 OT7K +9 / - 6 ✓ Closing observed
09-13 20:14 40m - / - DK8HC -8 / - 4 Partial capture
09-13 20:11 40m - / -19 II6IALU 0 / - 2 Partial capture
09-01 20:38 40m - / - F8MRQ -9 / - 3 Partial capture
09-01 20:33 40m - / -2 IZ6SCG -4 / - 5 ✓ Closing fragment
09-01 20:32 40m - / -12 TA2EE -8 / - 5 ✓ Closing fragment
09-01 20:32 40m - / -13 EU3LA -16 / - 2 ✓ Closing fragment
09-01 20:32 40m - / - IK2AUK -13 / - 2 Partial capture
09-01 20:32 40m - / - IK6CNM +6 / - 2 Partial capture
09-01 20:28 40m - / -15 F8MRQ -1 / - 5 Partial capture
09-01 20:28 40m - / - YO9BGU -2 / - 2 Partial capture
09-01 20:27 40m -17 / - D2ACE - / +5 2 ✓ Closing fragment
08-22 20:20 40m -13 / -7 UT6HN +11 / -11 4 ✓ Full exchange observed
08-22 20:19 40m -22 / -16 ON4AOI +14 / -25 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
202445 -13 1760  JS1NDM IT9ZGW R-12 (x3)
065215  -7 2343  JS1NDM IU3MAG +00 (x3)
202115  -5  358  JS1NDM UW5ZM KN57
202515  -6 2150  JS1NDM SV1DZB KM18 (x3)
203515 -10 1790  JS1NDM EA3EDU JN01 (x5)
80m 
UTC    dB Audio  Message
204545  +4 2475  JS1NDM ER4KAA -13 (x2)
204915  +8 2700  JS1NDM UA4FKT LO23
204915 +23 2890  JS1NDM OK4YL -24 (x3)
195245 +17 2590  JS1NDM ON4IQ -20 (x2)
195645  -3 1418  JS1NDM UA3ZNQ KO81
203100  -2  921  JS1NDM UX5UO -06 (x4)

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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