W4IOJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM86

Receiver-side FT8 activity involving W4IOJ, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-03.

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 21 FT8 messages attributed to W4IOJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (76%); the estimated median was -12 dB.

Overview

21
Messages attributed
5
UTC dates decoded
8
Active 15-min windows
-12 dB
Estimated median S/N

Bands

20m · 21
First attributed message: 2026-06-09
Last attributed message: 2026-07-03 03:58 UTC

Observed FT8 message patterns

Attributed sample
21 messages
Active dates
5 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-16 to -9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 2.

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 W4IOJ in decoded directed-looking exchanges:

Most frequent locator attributed to W4IOJ

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
EM86 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,911 km (approx.)
Last such locator decoded
2026-07-03 03:58 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 UTCBandW4IOJ S/NCounterpartCounterpart S/NMsgsCapture
08-25 04:15 20m - / -6 RX3ASQ -16 / - 3 ✓ Closing fragment
08-25 04:14 20m - / -17 UA3GIE -9 / - 3 ✓ Closing fragment
08-25 04:08 20m - / - 5Z4VJ -7 / - 3 Partial capture
08-25 04:08 20m - / - RD4A +5 / - 2 Partial capture
08-12 02:21 20m - / -9 UT5ECZ -6 / - 2 Partial capture
08-12 02:20 20m - / - DL1R +1 / - 8 Partial capture
08-04 22:48 20m - / - IK4LZH -4 / - 4 Partial capture
08-04 04:36 40m - / - HA5CPN -3 / - 2 Partial capture
08-04 04:35 40m - / - F5RRS -22 / - 3 Partial capture
08-04 04:31 40m - / - PD1WMD -17 / - 2 Partial capture
08-04 04:25 40m - / - IU1TLG -18 / - 2 Partial capture
08-04 04:22 40m - / - DC0ED -10 / - 2 ✓ Closing fragment
08-04 01:28 40m - / - EB3JT -19 / - 2 Partial capture
08-04 01:27 40m - / - F5PBG -12 / - 2 Partial capture
08-04 01:21 40m - / - R6FX -17 / - 3 Partial capture
07-31 07:11 20m - / - PD0WL -21 / - 5 Partial capture
07-23 01:11 20m - / - DK9ZQ -11 / - 5 Partial capture
07-23 00:48 20m - / -15 F1PBZ -10 / - 2 ✓ Closing fragment
07-07 03:23 20m - / -11 RA6MQ -10 / - 2 Partial capture
07-05 20:51 20m - / - GI4OGS -13 / - 4 Partial capture
06-26 02:34 20m - / - SV5BYP -11 / - 4 Partial capture
06-25 23:56 20m - / - PD0OTH -16 / - 2 Partial capture
06-24 22:57 20m - / +5 EA7LGM +9 / - 6 ✓ Closing fragment
06-24 22:16 20m - / -17 IS0KNG -9 / - 6 ✓ Closing fragment
06-24 06:19 20m - / - PA3CPS +10 / - 2 Partial capture
06-24 06:17 20m - / - DG2ZJ 0 / - 2 Partial capture
06-24 06:17 20m - / - HB9JNM -9 / - 7 Partial capture
06-24 06:15 20m - / - F5IXN -1 / - 3 Partial capture
06-24 06:15 20m - / -2 I4KYO -9 / - 5 Partial capture
06-24 04:26 20m - / -10 OD5KU -1 / - 3 ✓ Closing fragment
06-24 04:11 20m - / +6 PA3EVY -13 / - 3 ✓ Closing fragment
06-24 04:07 20m -10 / - UR7MA - / -8 2 Partial capture
06-24 04:07 20m - / - DG5AAG -6 / - 2 Partial capture
06-24 04:05 20m -9 / - UR3CFC - / -2 2 ✓ Closing fragment
06-24 04:02 20m - / - DG2ZJ -6 / - 3 Partial capture
06-24 03:50 20m - / -13 PA3KUS -15 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
022245  -6 2673  W4IOJ DL1R JN58 (x4)
040845  +7 1711  W4IOJ RD4A LN28
040845  -8 2126  W4IOJ 5Z4VJ KI88
040915  +3 1711  W4IOJ RD4A LN28
040915  -7 2126  W4IOJ 5Z4VJ KI88 (x2)
041415  -9 1273  W4IOJ UA3GIE RR73 (x3)
041545 -16 1691  W4IOJ RX3ASQ KO95 (x3)
40m 
UTC    dB Audio  Message
042145  -7 2766  W4IOJ 9A5TW JN83
042215 -10  989  W4IOJ DC0ED JO31
042245 -10  371  W4IOJ IU1TLG JN35
042315 -10  989  W4IOJ DC0ED 73
042545 -16 2201  W4IOJ IU1TLG JN35 (x2)
043115  -8  438  W4IOJ IK4LZH JN54
043145 -15 1903  W4IOJ PD1WMD JO21 (x3)
043545 -23 1951  W4IOJ F5RRS JN36
043645  -1  931  W4IOJ HA5CPN JN87
043645 -21 1951  W4IOJ F5RRS JN36
043715  -5  931  W4IOJ HA5CPN JN87
043715 -22 1951  W4IOJ F5RRS JN36

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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