OZ5NJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Denmark Most frequent locator attributed to this token: JO45

Receiver-side FT8 activity involving OZ5NJ, decoded by SO8OO in southeastern Poland. 790 FT8 messages attributed to this token as transmitter, on 80m, 20m, 10m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-07 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 790 FT8 messages attributed to OZ5NJ as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (42%), followed by 20 m (35%) and 80 m (24%). The busiest six-hour window was 09:00-15:00 UTC, containing 44% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -1 dB.

Overview

790
Messages attributed
23
UTC dates decoded
93
Active 15-min windows
-1 dB
Estimated median S/N

Bands

80m · 188 20m · 274 10m · 328
First attributed message: 2026-06-07
Last attributed message: 2026-08-25 02:41 UTC

Observed FT8 message patterns

Attributed sample
790 messages
Active dates
23 UTC dates
Estimated median S/N
-1 dB
Estimated 10th-90th percentile
-14 to +11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 53, moderate (-15 to -9 dB) 150, strong (≥ -8 dB) 587.

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 OZ5NJ 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 OZ5NJ

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
JO45 · 247 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,058 km (approx.)
Last such locator decoded
2026-08-25 02:41 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 UTCBandOZ5NJ S/NCounterpartCounterpart S/NMsgsCapture
08-24 22:37 80m +22 / -5 UT5ZC +10 / - 5 ✓ Full exchange observed
08-15 17:00 20m - / -2 7Z1BQ -8 / - 2 ✓ Closing fragment
08-15 16:54 20m - / -7 EC3A -10 / - 2 Partial capture
08-15 16:45 20m -14 / - VU3OIP - / +5 2 ✓ Closing fragment
08-04 03:23 80m 0 / +7 SP5KG +11 / - 4 ✓ Closing observed
08-04 03:21 80m +7 / +3 DL3HN -1 / +1 5 ✓ Full exchange observed
08-04 03:19 80m - / -8 PU2RKW -20 / - 3 ✓ Closing fragment
08-04 03:16 80m +8 / -14 KZ3P -16 / -15 5 ✓ Full exchange observed
08-04 03:15 80m +11 / -17 AA6KJ -8 / -11 5 ✓ Full exchange observed
08-04 03:13 80m +14 / - NG5U - / -22 2 ✓ Closing fragment
08-04 03:11 80m +8 / - OK2UPG +13 / +1 5 ✓ Full exchange observed
08-04 03:10 80m +9 / - NG5U - / -22 2 Partial capture
08-04 03:09 80m +8 / -6 N1MRE -20 / -15 2 Partial capture
08-04 03:06 80m +3 / -6 UA3SCF -12 / -17 7 ✓ Full exchange observed
08-04 03:03 80m 0 / -20 UA6BEW -10 / - 6 ✓ Closing observed
08-04 03:03 80m +2 / -11 W3ICM -8 / -12 5 ✓ Full exchange observed
08-04 03:02 80m +3 / +6 US1VM 0 / -14 4 ✓ Full exchange observed
08-04 02:59 80m +1 / - YL2NX -4 / - 4 ✓ Closing observed
08-04 02:58 80m +3 / -5 HA3GX -5 / -9 6 ✓ Full exchange observed
08-04 02:58 80m +8 / -2 IQ4JO +8 / +1 5 ✓ Full exchange observed
08-04 02:57 80m +8 / - CT2GQA -10 / +3 3 ✓ Closing observed
08-04 02:54 80m +12 / -16 N8KR -19 / -14 5 ✓ Full exchange observed
08-04 02:54 80m +7 / -6 HI3A -11 / -5 2 Partial capture
08-04 02:53 80m +4 / -6 UR8EP +3 / -2 5 ✓ Full exchange observed
08-04 02:51 80m +4 / -16 F5LMJ -16 / -12 6 ✓ Full exchange observed
08-04 02:51 80m - / - K4YJ -24 / - 2 Partial capture
08-04 02:50 80m +11 / -12 NT9F -11 / -13 6 ✓ Full exchange observed
08-04 02:50 80m +10 / -10 HI3T -8 / -7 4 ✓ Full exchange observed
08-04 02:48 80m +9 / - N8KR -21 / -17 4 Partial capture
08-04 02:45 80m +9 / -2 TJ1GD/P -14 / -16 8 ✓ Full exchange observed
08-04 02:42 80m +9 / - K1NIC - / -17 3 ✓ Closing fragment
08-04 02:39 80m +9 / -3 VP2MAA -6 / -4 4 ✓ Full exchange observed
07-29 11:51 10m - / -19 F1PBZ -4 / - 2 Partial capture
07-28 06:11 20m - / -10 UA6HGM -9 / - 3 ✓ Closing fragment
07-28 06:01 20m -7 / - ND3L - / +1 2 ✓ Closing fragment
07-28 05:58 20m -8 / - NU6V - / -16 3 ✓ Closing fragment
07-28 05:57 20m -8 / - YV6BXN - / +2 2 ✓ Closing fragment
07-28 05:56 20m -4 / - KC9LBF - / -12 2 ✓ Closing fragment
07-28 05:54 20m -9 / - F4HSB - / - 2 ✓ Closing fragment
07-28 05:52 20m -10 / - AG6X - / -17 2 ✓ Closing fragment
07-28 05:52 20m - / - PD9FLX -13 / - 3 Partial capture
07-28 05:51 20m -6 / - W6IWW - / -2 2 ✓ Closing fragment
07-28 05:49 20m -10 / - AD9GE - / +5 2 ✓ Closing fragment
07-28 05:48 20m - / - UR4QWW -10 / - 3 Partial capture
07-28 05:46 20m -7 / - XE1YO - / -2 5 ✓ Closing fragment
07-26 14:55 20m -9 / - BG5EGC - / -21 5 Partial capture
07-26 14:53 20m - / -23 DL6KDS -10 / - 2 Partial capture
07-26 14:53 20m +4 / - R9FDE - / -8 3 ✓ Closing fragment
07-26 14:52 20m - / - EA3CVI -19 / - 2 Partial capture
07-26 14:52 20m +2 / - DL7DO - / +3 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
032300  +4 2104  CQ OZ5NJ JO45 (x2)
032345 +12 1174  OZ5NJ SP5KG KO02
032415  -2 2070  OZ5NJ IU5TUG JN53
032515  +9 1174  OZ5NJ SP5KG R+07
032530  +0 2104  SP5KG OZ5NJ RR73
032545 +11 1175  OZ5NJ SP5KG 73
032600  +1 1940  CQ OZ5NJ JO45 (x2)
223700 +21 2744  UT5ZC OZ5NJ JO45
223715 +10 1887  OZ5NJ UT5ZC -05
223730 +21 2744  UT5ZC OZ5NJ R+15
223745 +11 1887  OZ5NJ UT5ZC RR73
223800 +23 2744  UT5ZC OZ5NJ 73
024115  +6 2121  KF4VTT OZ5NJ JO45
20m 
UTC    dB Audio  Message
060800  -8  680  N7AJ OZ5NJ RR73
060930  -9  680  W4UTZ OZ5NJ RR73
061115 -15  680  OZ5NJ UT0CK 73
061145  -9  679  OZ5NJ UA6HGM LN14 (x3)
061400 -13  680  WB8SCG OZ5NJ 73
055215 -12  286  OZ5NJ R6FX LN14
164545 -15  908  VU3OIP OZ5NJ R+05 (x2)
164645 -18  908  BG5IOG OZ5NJ R-09
165400 -11 1436  OZ5NJ EC3A -07 (x2)
170000 -11  926  OZ5NJ 7Z1BQ -02 (x2)
10m 
UTC    dB Audio  Message
124945 -15 1978  G1SUM OZ5NJ R+00 (x3)
125145  +1 1978  KO4OSA OZ5NJ -09 (x2)
125245 -13 2073  CQ OZ5NJ JO45
125315 -13 2073  UB2FEK OZ5NJ +04 (x2)
125715  -8 2074  8S7DL OZ5NJ JO45 (x4)
094645 -13 2489  IU3GKQ OZ5NJ JO45
115115  -1 2690  OZ5NJ F1PBZ -19 (x2)

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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