OH3NDH — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving OH3NDH, decoded by SO8OO in southeastern Poland. 700 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-20.
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 700 FT8 messages attributed to OH3NDH as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (61%), followed by 40 m (30%) and 20 m (6%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (65%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-09-20 07:55 UTC
Observed FT8 message patterns
- Attributed sample
- 700 messages
- Active dates
- 28 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -19 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 150, moderate (-15 to -9 dB) 94, strong (≥ -8 dB) 456.
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 OH3NDH 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 OH3NDH
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
- KP20 · 397 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,192 km (approx.)
- Last such locator decoded
- 2026-09-20 07:55 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 | OH3NDH S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 08:03 | 40m | - / -22 | MI0AIH | -18 / - | 2 | Partial capture |
| 09-20 07:55 | 40m | -17 / - | DK3RV | -15 / - | 2 | ✓ Closing observed |
| 09-20 07:49 | 40m | -14 / - | R2FBW | - / - | 2 | Partial capture |
| 09-20 07:44 | 40m | - / -14 | GU0SUP | -5 / - | 5 | ✓ Closing fragment |
| 09-20 07:36 | 40m | - / -8 | SP7MAZ | +2 / - | 3 | ✓ Closing fragment |
| 09-20 07:34 | 40m | -8 / - | GU0SUP | - / - | 2 | Partial capture |
| 09-19 22:36 | 40m | -3 / - | IR0IADU | - / -1 | 2 | Partial capture |
| 09-19 22:27 | 40m | -2 / - | S79KW | - / - | 3 | Partial capture |
| 09-19 22:24 | 40m | +4 / - | 4K6SA | - / -9 | 2 | ✓ Closing fragment |
| 09-19 22:20 | 80m | +2 / +4 | SP3BZU | +6 / +6 | 4 | ✓ Full exchange observed |
| 09-19 22:18 | 80m | -2 / -17 | MW7GQB | -5 / -3 | 5 | ✓ Full exchange observed |
| 09-19 22:17 | 80m | -1 / - | UA9D | - / -19 | 2 | ✓ Closing fragment |
| 09-19 22:15 | 80m | +2 / -7 | T77RN | -10 / -14 | 6 | ✓ Full exchange observed |
| 09-19 22:13 | 80m | +1 / -14 | II9IAGM | -10 / -14 | 4 | Partial capture |
| 09-19 22:09 | 80m | -4 / - | VU2MSA | - / - | 2 | Partial capture |
| 09-19 22:06 | 80m | +6 / -12 | IK4TVP | -5 / -4 | 6 | ✓ Full exchange observed |
| 09-19 22:04 | 80m | +11 / - | SN100PKP | - / -17 | 3 | Partial capture |
| 09-19 21:32 | 80m | 0 / -4 | RY3F | -2 / -8 | 4 | ✓ Full exchange observed |
| 09-19 21:31 | 80m | +10 / - | DB100FT | - / -14 | 2 | Partial capture |
| 09-19 21:29 | 80m | +8 / -7 | IU0VYT | +3 / -8 | 5 | ✓ Full exchange observed |
| 09-19 21:28 | 80m | +10 / - | TF3VS | - / -14 | 3 | ✓ Closing fragment |
| 09-08 20:47 | 80m | -2 / - | Z62NS | - / -21 | 5 | Partial capture |
| 09-08 20:39 | 80m | -3 / - | Z62NS | - / -21 | 5 | Partial capture |
| 09-08 20:26 | 80m | +1 / -4 | Z62NS | +14 / - | 10 | ✓ Full exchange observed |
| 09-08 20:19 | 80m | -5 / - | Z62NS | - / - | 9 | Partial capture |
| 09-08 20:18 | 80m | -2 / - | OH6DBJ | - / -8 | 3 | ✓ Closing fragment |
| 09-05 22:44 | 80m | -2 / - | KP4AA | - / - | 3 | Partial capture |
| 09-04 22:11 | 80m | - / - | F5PBG | -12 / - | 4 | Partial capture |
| 09-04 22:10 | 80m | +3 / -1 | OE1KSG | -6 / -15 | 5 | ✓ Full exchange observed |
| 09-04 20:47 | 80m | -2 / - | DK5AN/P | -9 / -7 | 6 | ✓ Closing observed |
| 09-04 20:40 | 80m | -7 / - | SV5ADM | - / - | 3 | Partial capture |
| 09-04 20:38 | 80m | +4 / - | OH1LA | -16 / +5 | 5 | ✓ Full exchange observed |
| 09-04 20:36 | 80m | +7 / -10 | OV6ZM | -14 / +1 | 6 | ✓ Full exchange observed |
| 09-04 20:29 | 40m | -8 / - | SV5BYP | +2 / - | 3 | ✓ Closing observed |
| 09-04 20:24 | 40m | -5 / - | BG0FQU | - / -17 | 3 | ✓ Closing fragment |
| 09-04 20:22 | 40m | -1 / 0 | EU2AAI | -2 / +10 | 6 | ✓ Full exchange observed |
| 09-04 20:00 | 40m | - / -21 | HB9XBY | -2 / - | 3 | ✓ Closing fragment |
| 09-04 19:41 | 80m | -2 / - | 3Z100PKP | - / - | 2 | Partial capture |
| 09-04 19:37 | 80m | +4 / - | R8AIM/0 | - / - | 9 | Partial capture |
| 09-04 19:34 | 80m | -5 / 0 | ES0MVM | 0 / - | 5 | ✓ Full exchange observed |
| 09-04 19:32 | 80m | 0 / -1 | LX1JH | +14 / - | 5 | ✓ Full exchange observed |
| 09-04 12:47 | 40m | - / -11 | OH2J | -14 / - | 3 | Partial capture |
| 09-04 12:42 | 40m | - / -9 | OH2OT | -15 / - | 2 | ✓ Closing fragment |
| 09-02 23:48 | 80m | +1 / +6 | OH4JFN | -6 / - | 8 | ✓ Full exchange observed |
| 09-02 23:45 | 80m | +11 / - | DL7EDU | +7 / - | 5 | ✓ Full exchange observed |
| 09-02 23:44 | 80m | +4 / - | SM7TZK | - / - | 3 | ✓ Closing fragment |
| 09-02 23:43 | 80m | +12 / -16 | 4X1YA | -6 / +5 | 4 | ✓ Full exchange observed |
| 08-27 20:35 | 80m | -7 / - | RI1FJL | - / - | 11 | Partial capture |
| 08-27 20:24 | 80m | -8 / - | RI1FJL | - / - | 12 | Partial capture |
| 08-26 05:33 | 20m | - / - | SK2TT | -10 / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 073815 +2 2605 OH3NDH SP7MAZ 73 074400 -6 2790 OH3NDH GU0SUP IN89 (x5) 074930 -15 2435 R2FBW OH3NDH KP20 (x2) 075315 -13 1315 OH3NDH R2FBW +00 075545 -17 1590 DK3RV OH3NDH KP20 075700 -15 1015 OH3NDH DK3RV RR73 075830 -11 2091 OH3NDH SN100PKP -13 080300 +5 687 OH3NDH SN40KZE +02 080300 -18 1230 OH3NDH MI0AIH -22 (x2)
UTC dB Audio Message 221600 -7 505 OH3NDH T77RN -07 221615 +7 1512 T77RN OH3NDH R-14 221630 -13 505 OH3NDH T77RN RR73 221645 +2 1512 T77RN OH3NDH 73 221715 -2 1512 UA9D OH3NDH -19 (x2) 221845 -2 1512 MW7GQB OH3NDH KP20 221900 -3 1511 OH3NDH MW7GQB -17 221915 -3 1512 MW7GQB OH3NDH R-03 221930 -3 1511 OH3NDH MW7GQB RR73 (x2) 222015 +0 1512 SP3BZU OH3NDH +06 222030 +6 2161 OH3NDH SP3BZU R+04 222045 +3 1512 SP3BZU OH3NDH RR73 222100 +6 2161 OH3NDH SP3BZU 73
UTC dB Audio Message 050815 -13 2502 CQ DX OH3NDH KP20 (x2) 051115 -4 669 OH3NDH XQ1KK RR73 051545 +6 2846 OH3NDH F4IIX IN95 051615 -17 1785 OH3NDH RK9UM NO35 (x2) 051645 -1 1324 OH3NDH F4JFC JN06 051715 -10 1785 OH3NDH TA2EE KM69 (x2) 051745 -2 1324 OH3NDH F4JFC JN06 053345 -12 1575 OH3NDH SK2TT JP94 (x5)
UTC dB Audio Message 182730 -10 1932 ER3UA OH3NDH KP20 (x2) 182815 +0 2137 OH3NDH ER3UA -06 182830 -9 1932 ER3UA OH3NDH R+00 182845 +1 2137 OH3NDH ER3UA RR73 182900 -10 1932 ER3UA OH3NDH 73 182915 -1 2137 OH3NDH ER3UA KN37 (x2) 182945 -5 1130 OH3NDH DK7UY JO44 183015 +1 2137 OH3NDH ER3UA KN37 183015 -2 1130 OH3NDH DK7UY JO44 184300 -9 1807 OH3NDH OJ0YL +00 184330 -10 1806 OH3NDH RR73; SP2Y <...> +06 184745 -16 1933 <...> OH3NDH KP20 184815 -16 1933 <DQ30GDXF> OH3NDH KP20
UTC dB Audio Message 211800 -15 1648 OH3NDH UB3YGA -10 (x2) 211845 -19 1947 UB3YGA OH3NDH 73 211915 -20 1947 RA3TOS OH3NDH R-14 (x2) 212215 -21 1947 OK6RP OH3NDH KP20 (x5) 212615 -15 1947 DO6LE OH3NDH KP20 212930 -19 1974 OH3NXW OH3NDH KP20
UTC dB Audio Message 130915 -16 2054 US0QV OH3NDH KP20 (x2) 131100 -6 2395 OH3NDH DK7UY JO44 131145 -13 2054 DO9BAU OH3NDH +00 (x2) 131400 -11 2395 OH3NDH DK7UY R-01 (x2) 131715 -16 2054 PD0CIF OH3NDH -13 (x2) 131900 -14 2054 OH3NDH UA4FKT LO23 132330 -13 2285 OH3NDH PD2WS JO23 135415 -24 2007 7Q3WS OH3NDH KP20
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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