NJ9U — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving NJ9U, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-21 and 2026-08-25.
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 6 FT8 messages attributed to NJ9U as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 80 m (33%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-25 03:19 UTC
Observed FT8 message patterns
- Attributed sample
- 6 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -18 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 1, 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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with NJ9U in decoded directed-looking exchanges:
Most frequent locator attributed to NJ9U
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
- EM78 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,859 km (approx.)
- Last such locator decoded
- 2026-08-25 03:19 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 | NJ9U S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-05 23:26 | 40m | - / -13 | ON1DGN | -14 / - | 2 | Partial capture |
| 09-05 23:16 | 40m | - / - | IZ8DBJ | -4 / - | 3 | Partial capture |
| 09-05 22:59 | 40m | - / - | LA9H | +2 / - | 2 | Partial capture |
| 09-05 22:58 | 40m | - / - | DH5BM | +7 / - | 9 | Partial capture |
| 08-29 01:07 | 20m | - / -16 | YO4NF | -12 / - | 2 | Partial capture |
| 08-26 02:29 | 80m | - / -6 | WZ4K | -21 / - | 2 | ✓ Closing fragment |
| 08-25 03:23 | 40m | - / - | F4BYA | -1 / - | 4 | Partial capture |
| 08-25 03:19 | 40m | - / - | PC2J | +6 / - | 4 | Partial capture |
| 08-25 03:19 | 40m | - / - | R2EC | 0 / - | 2 | Partial capture |
| 08-25 03:19 | 40m | - / - | UW5ZM | +10 / - | 2 | Partial capture |
| 08-25 03:15 | 40m | - / - | R2AL | +11 / - | 4 | Partial capture |
| 08-25 03:12 | 40m | - / -17 | YO4NF | -4 / - | 2 | Partial capture |
| 08-25 03:08 | 40m | - / - | R2EC | +5 / - | 4 | Partial capture |
| 08-25 03:08 | 40m | - / - | PC2J | +6 / - | 3 | Partial capture |
| 08-25 00:35 | 80m | - / +2 | VE9GSB | -13 / - | 7 | ✓ Closing fragment |
| 08-23 01:13 | 80m | - / - | SP1MGM | +10 / - | 2 | Partial capture |
| 08-23 01:02 | 80m | - / -12 | TF3VS | 0 / - | 3 | ✓ Closing fragment |
| 08-06 00:55 | 80m | - / - | DK5WL | -4 / - | 3 | Partial capture |
| 08-05 02:33 | 80m | - / - | DO1ID | +4 / - | 3 | Partial capture |
| 08-05 02:32 | 80m | - / -16 | EC3A | -16 / - | 4 | Partial capture |
| 08-01 04:55 | 20m | - / -20 | EA3GXK | -11 / - | 5 | Partial capture |
| 08-01 03:35 | 80m | - / - | DO1ID | +15 / - | 3 | Partial capture |
| 07-31 03:16 | 80m | - / -17 | DL8TV | -2 / - | 2 | Partial capture |
| 07-30 03:43 | 80m | - / - | DK5WL | -14 / - | 3 | Partial capture |
| 07-26 04:19 | 40m | - / -12 | LZ3CB | -8 / - | 3 | ✓ Closing fragment |
| 07-26 04:18 | 40m | - / - | SP4TKA | -8 / - | 3 | Partial capture |
| 07-26 04:16 | 40m | - / - | OO0O | -7 / - | 4 | Partial capture |
| 07-26 04:13 | 40m | - / - | DL1HBX | -16 / - | 2 | Partial capture |
| 07-26 04:02 | 40m | - / - | DJ0MAB | -4 / - | 2 | Partial capture |
| 07-26 03:59 | 40m | - / - | SP1ZMO | -14 / - | 3 | Partial capture |
| 07-26 03:55 | 40m | - / - | DL1UDO | -19 / - | 3 | Partial capture |
| 07-26 03:50 | 40m | - / -10 | DL3OCF | +12 / - | 3 | Partial capture |
| 07-21 03:01 | 40m | - / - | PC2J | -4 / - | 3 | Partial capture |
| 07-21 03:00 | 40m | - / - | OH2CLX | -6 / - | 7 | Partial capture |
| 07-21 02:56 | 40m | - / - | OH2CLX | -10 / - | 2 | Partial capture |
| 07-21 02:55 | 40m | - / -13 | EI2IXB | -12 / - | 2 | Partial capture |
| 07-21 02:55 | 40m | - / - | OO0O | -8 / - | 8 | Partial capture |
| 07-21 02:55 | 40m | - / - | PD0RCQ | 0 / - | 3 | Partial capture |
| 07-21 02:39 | 80m | - / -10 | ON3ANY | +13 / - | 10 | Partial capture |
| 07-21 02:39 | 80m | - / - | HB9MZI | -14 / - | 6 | Partial capture |
| 07-21 02:36 | 80m | - / - | F5MYK | -6 / - | 4 | Partial capture |
| 07-16 03:05 | 80m | - / - | DL8LE | +2 / - | 4 | Partial capture |
| 07-16 03:02 | 80m | - / -17 | F1PBZ | +2 / - | 2 | Partial capture |
| 07-15 02:09 | 80m | - / - | DO1ID | -4 / - | 2 | Partial capture |
| 07-15 02:09 | 80m | - / - | DO9JTR | +13 / - | 5 | Partial capture |
| 07-15 02:09 | 80m | - / - | SN93LOT | +2 / - | 3 | Partial capture |
| 07-15 01:56 | 80m | - / +7 | VE3XN | -16 / - | 2 | ✓ Closing fragment |
| 07-07 17:48 | 20m | - / - | DF3IS | +1 / - | 2 | Partial capture |
| 06-30 04:12 | 40m | - / - | OM0RX | -16 / - | 3 | Partial capture |
| 06-30 04:04 | 40m | - / -16 | IK3OGN | -14 / - | 8 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 225845 +10 325 NJ9U DH5BM JO41 225915 -1 728 NJ9U LA9H JO59 225915 +4 325 NJ9U DH5BM JO41 (x3) 230045 +4 728 NJ9U LA9H JO59 230045 +9 325 NJ9U DH5BM JO41 (x4) 231615 -6 2024 NJ9U IZ8DBJ JN70 (x3) 232615 -14 1437 NJ9U ON1DGN -13 (x2)
UTC dB Audio Message 010245 -1 2021 NJ9U TF3VS HP94 (x3) 011300 +8 596 NJ9U SP1MGM JO73 (x2) 003530 -13 643 NJ9U VE9GSB FN65 (x7) 022945 -18 1149 NJ9U WZ4K -06 (x2) 032800 +5 2497 NJ9U EA5CRC IM98
UTC dB Audio Message 031330 -18 1346 NJ9U WB8SCG 73
UTC dB Audio Message 211100 -17 824 NJ9U W4DXM RR73 174815 +2 349 NJ9U DF3IS JN49 (x2) 045530 -11 258 NJ9U EA3GXK IM98 (x5) 124715 -17 2663 NJ9U RW0SM 73 010700 -11 302 NJ9U YO4NF -16 (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.
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