ON4MDW — 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: Belgium Most frequent locator attributed to this token: JO10

Receiver-side FT8 activity involving ON4MDW, decoded by SO8OO in southeastern Poland. 1,122 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 10m, across 24 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-22.

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 1,122 FT8 messages attributed to ON4MDW as the transmitting token by decoded message structure across 24 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (66%), followed by 80 m (26%) and 10 m (7%). Most decodes (67%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (66%); the estimated median was -18 dB.

Overview

1,122
Messages attributed
24
UTC dates decoded
117
Active 15-min windows
-18 dB
Estimated median S/N

Bands

160m · 4 80m · 296 60m · 737 40m · 6 10m · 79
First attributed message: 2026-06-11
Last attributed message: 2026-10-22 07:05 UTC

Observed FT8 message patterns

Attributed sample
1,122 messages
Active dates
24 UTC dates
Estimated median S/N
-18 dB
Estimated 10th-90th percentile
-23 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 745, moderate (-15 to -9 dB) 138, strong (≥ -8 dB) 239.

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 ON4MDW 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 ON4MDW

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
JO10 · 750 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,335 km (approx.)
Last such locator decoded
2026-10-22 07:05 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 UTCBandON4MDW S/NCounterpartCounterpart S/NMsgsCapture
10-22 07:36 60m - / -8 DF4WQ -14 / - 3 ✓ Closing fragment
10-22 07:26 60m - / -13 SP9W +8 / - 4 ✓ Closing fragment
10-21 19:50 60m -16 / - SP2EWQ -18 / +8 3 ✓ Closing observed
10-21 19:46 60m -21 / -21 IU2VUD -15 / - 5 ✓ Closing observed
10-21 18:59 60m -23 / - SP4HXV - / - 2 ✓ Closing fragment
10-21 18:59 60m -18 / -6 DH6DAO -10 / 0 7 ✓ Full exchange observed
10-18 19:36 60m -18 / - OM8LM - / +3 2 ✓ Closing fragment
10-18 19:34 60m -17 / +4 DC6NS +6 / +9 5 ✓ Full exchange observed
10-18 19:32 60m -18 / - SP9DPI - / -20 2 ✓ Closing fragment
10-18 19:30 60m -16 / -2 HB9HAN -8 / +1 5 ✓ Full exchange observed
10-18 19:27 60m - / -3 DP75BAC -12 / - 2 Partial capture
10-18 19:27 60m -19 / -5 DL1DWR 0 / -2 3 Partial capture
10-18 19:25 60m -20 / - SP8LCE - / -15 2 ✓ Closing fragment
10-18 19:22 60m -18 / -16 DL1DWR -16 / -13 3 Partial capture
10-18 19:09 60m -20 / +8 PF1B -21 / +10 5 ✓ Full exchange observed
10-18 18:53 60m -18 / -18 IU2SMN -14 / -4 4 ✓ Full exchange observed
10-18 18:47 60m -16 / - ON6CQ - / -7 2 ✓ Closing fragment
10-18 18:46 60m -17 / - HG9FS -8 / +7 3 ✓ Closing observed
10-18 18:39 60m -21 / 0 DG4BZ -6 / - 2 ✓ Closing observed
10-15 20:38 60m -22 / - SP9MOC - / -8 2 ✓ Closing fragment
10-15 20:38 60m -20 / -18 G3RLX -9 / +1 8 ✓ Full exchange observed
10-15 19:12 60m - / -6 DM2PE -13 / - 6 ✓ Closing fragment
10-15 19:05 60m - / -6 DL3DQL/P +7 / - 3 ✓ Closing fragment
10-14 19:05 60m -15 / -5 DH4BM -4 / +5 5 ✓ Full exchange observed
10-14 19:03 60m -12 / - DG4BD - / 0 2 ✓ Closing fragment
10-14 18:39 60m - / -12 SQ8GBG -18 / - 3 ✓ Closing fragment
10-14 17:51 60m -24 / -8 DF0BT -4 / +5 3 ✓ Full exchange observed
10-14 17:44 60m -20 / - M0IOW - / +10 2 ✓ Closing fragment
10-14 17:43 60m -21 / - EA3ACQ -10 / - 2 ✓ Closing observed
10-14 17:38 60m -21 / -21 EA3ACQ -10 / +2 3 Partial capture
10-14 17:22 60m -23 / -10 DB3EH -3 / - 9 ✓ Full exchange observed
10-13 06:30 60m - / -13 ON8LX -13 / - 3 ✓ Closing fragment
10-13 06:21 60m -20 / -6 IK2UCK -12 / - 5 ✓ Full exchange observed
10-13 06:15 60m -21 / -5 G0BLB -1 / - 4 ✓ Full exchange observed
10-13 05:49 60m -24 / - DD6MH -21 / - 2 ✓ Closing observed
10-11 20:10 60m - / -6 IK5ZPV -3 / - 2 ✓ Closing fragment
10-11 20:07 60m - / -13 DL6CM +9 / - 3 ✓ Closing fragment
10-11 20:01 60m -22 / -16 DL3BH -12 / - 5 ✓ Closing observed
10-11 11:50 10m -22 / - ON4LDZ - / -9 2 ✓ Closing fragment
10-11 05:52 80m - / -8 HF9D +15 / - 4 ✓ Closing fragment
10-11 05:44 80m -4 / +3 SP5KG +5 / +3 6 ✓ Full exchange observed
10-11 05:43 80m - / -6 HB9GII -14 / - 3 ✓ Closing fragment
10-11 05:40 80m -1 / - LA2XNA - / -12 2 ✓ Closing fragment
10-11 05:38 80m -3 / - N8OQ - / -13 2 ✓ Closing fragment
10-11 05:34 80m 0 / - EA2EDI - / +3 2 ✓ Closing fragment
10-11 05:12 80m +2 / - YO6LRV -19 / -22 19 Partial capture
10-11 05:09 80m -2 / -17 SP5MXZ +12 / -1 4 ✓ Full exchange observed
10-11 05:08 80m - / - DO2AY -19 / - 5 Partial capture
10-11 04:58 80m -3 / -3 SQ8CK -14 / -21 4 ✓ Full exchange observed
10-11 04:52 80m - / -1 OH3GBW -14 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
203845 -11 1775  CQ ON4MDW JO10
070015 -21 1645  F5OYA/P ON4MDW RR73
070045 -22 1644  CQ ON4MDW JO10                        a1 (x5)
072630  +8 1090  ON4MDW SP9W KO00 (x4)
073630 -16 2247  ON4MDW DF4WQ JN39 (x3)
081000 -17 1645  ON4MDW PA4G JO22
160m 
UTC    dB Audio  Message
201615 -16 1541  CQ ON4MDW JO10 (x4)
10m 
UTC    dB Audio  Message
145145 -24 1961  CQ ON4MDW JO10 (x10)
115045 -21 1971  ON4LDZ ON4MDW -09 (x2)
120345 -20 1970  RA3XDX ON4MDW -05
122645 -23 1970  CQ ON4MDW JO10
80m 
UTC    dB Audio  Message
054430  +0 2349  ON4MDW SP5KG KO02
054430 -11 2805  ON4MDW HB9GII 73
054445  -1 1594  CQ ON4MDW JO10
054500  +3 2349  ON4MDW SP5KG KO02
054515  -3 1594  SP5KG ON4MDW +03
054530  +8 2349  ON4MDW SP5KG R+03
054545  -6 1594  SP5KG ON4MDW RR73
054600  +9 2349  ON4MDW SP5KG 73
054745  -2 1594  OE2AGZ ON4MDW -17
054845  -1 1594  CQ ON4MDW JO10 (x2)
055230 +18  664  ON4MDW HF9D JO90 (x4)
40m 
UTC    dB Audio  Message
181845 -17 1718  CQ ON4MDW JO10
182230  -1  789  ON4MDW DL2BU JO41 (x2)
182315 -17 1719  DL2BU ON4MDW RR73
182600  -5 1172  ON4MDW I0XNH JN62 (x3)
182745  -9 1719  CQ ON4MDW JO10

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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