WM4W — 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: United States Most frequent locator attributed to this token: FM18

Receiver-side FT8 activity involving WM4W, decoded by SO8OO in southeastern Poland. 401 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 33 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-11-06.

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 401 FT8 messages attributed to WM4W as the transmitting token by decoded message structure across 33 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (60%), followed by 80 m (36%) and 40 m (4%). Most decodes (93%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

401
Messages attributed
33
UTC dates decoded
82
Active 15-min windows
-12 dB
Estimated median S/N

Bands

80m · 143 40m · 16 20m · 242
First attributed message: 2026-06-07
Last attributed message: 2026-11-06 02:33 UTC

Observed FT8 message patterns

Attributed sample
401 messages
Active dates
33 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-21 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 115, moderate (-15 to -9 dB) 153, strong (≥ -8 dB) 133.

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 WM4W 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 WM4W

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
FM18 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,390 km (approx.)
Last such locator decoded
2026-10-31 01:17 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 UTCBandWM4W S/NCounterpartCounterpart S/NMsgsCapture
11-06 01:22 80m -14 / - OH8SR - / -21 2 Partial capture
11-06 01:20 80m - / - UA4FKT 0 / - 2 Partial capture
11-06 01:15 80m -2 / -9 SP8WB -2 / -24 8 ✓ Full exchange observed
11-02 01:13 80m -14 / - K1EDG - / -5 2 Partial capture
11-01 01:07 80m - / - RN6HK +5 / - 2 Partial capture
11-01 01:05 80m -5 / -5 UR5FLN +6 / -15 4 ✓ Full exchange observed
11-01 01:04 80m - / -1 S51SLO +10 / - 2 ✓ Closing fragment
10-31 01:19 80m - / - UX7UU +16 / - 2 Partial capture
10-31 00:26 80m - / - UX7UU +6 / - 2 Partial capture
09-29 01:30 80m - / - SP1MGM +9 / - 4 Partial capture
09-29 01:27 80m -19 / -11 9A5E +13 / -16 9 Partial capture
09-29 01:25 80m - / -9 G3VCQ -6 / - 2 ✓ Closing fragment
09-29 01:16 80m -16 / -14 DL4ME +12 / -15 11 ✓ Full exchange observed
09-29 01:16 80m - / - SP1MGM -2 / - 4 Partial capture
09-29 01:14 80m -22 / - HI3JCC - / -10 5 ✓ Closing fragment
09-27 00:56 80m -16 / - 9Y4D - / -3 2 Partial capture
09-24 01:44 80m - / -8 DG3YEV +6 / - 2 ✓ Closing fragment
09-24 01:44 80m -16 / -9 F5RMK -5 / -15 6 Partial capture
09-24 00:50 80m -13 / -10 EC3A +5 / -24 2 Partial capture
09-24 00:47 80m -13 / -12 RX6DA -6 / -20 7 ✓ Full exchange observed
09-24 00:46 80m -10 / -15 EW8AAC -6 / -18 9 Partial capture
09-24 00:45 80m - / - RC6OU +9 / - 7 Partial capture
09-24 00:45 80m -9 / -21 RN2F +2 / -24 8 Partial capture
08-30 00:20 80m - / -7 S53X -4 / - 4 ✓ Closing fragment
08-30 00:19 80m -20 / -16 US5ZAY +4 / -21 5 ✓ Full exchange observed
08-30 00:18 80m - / - DO1DX -8 / - 4 Partial capture
08-30 00:16 80m - / - SV8JE -4 / - 6 Partial capture
08-30 00:16 80m -17 / -24 UA4FKT -4 / -18 4 Partial capture
08-30 00:15 80m -13 / -14 S54L +8 / -5 3 ✓ Full exchange observed
08-30 00:13 80m - / -14 9A5E 0 / - 2 ✓ Closing fragment
08-29 23:47 20m - / -8 7Z1DJ -18 / - 4 Partial capture
08-20 22:12 20m -2 / - A61OK - / -21 3 Partial capture
08-20 21:38 20m 0 / - CN8NS - / -24 2 Partial capture
08-19 22:04 40m - / -12 MI0TMW -14 / - 3 Partial capture
08-16 19:14 20m - / - RW9WC -15 / - 3 Partial capture
08-13 22:42 40m - / -14 G5TV -20 / - 4 ✓ Closing fragment
08-13 22:05 20m -23 / - LY2TS - / +2 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
011330 -15 1181  K1EDG WM4W -05
011500  +1  821  SP8WB WM4W -24
011515  -3  861  WM4W SP8WB R-09
011530  -1  844  SP8WB WM4W -24
011545  -3  861  WM4W SP8WB R-09
011600  -5  845  SP8WB WM4W -24
011615  -3  861  WM4W SP8WB R-09
011630  -1  845  SP8WB WM4W RR73
011645  +0  861  WM4W SP8WB 73
011930  -3 1338  WM4W G3VCQ R-08
012000  +1 1308  WM4W UA4FKT LO23 (x2)
012200 -16 1831  OH8SR WM4W -21 (x2)
023345 -20 1197  TI2YO WM4W -03
20m 
UTC    dB Audio  Message
213000  -3  352  WM4W EB5DFU -06
213415 -23 1602  PD1RGW WM4W RR73
214100 -18 1090  OE1MSC WM4W +03
213845  -2 1226  CN8NS WM4W -24 (x2)
221230  -5 1180  A61OK WM4W -21 (x3)
234700 -17 1837  WM4W 7Z1DJ R-08 (x4)
154600  -8  969  WM4W LA5TTA R-14
162845 -22 2230  EP2AES WM4W -22
163045  -4 1357  WM4W SA3SHN 73
40m 
UTC    dB Audio  Message
224245 -16 1590  WM4W G5TV IO93
224245 -22 1641  WM4W EA6TU R-11
224315 -22 1590  WM4W G5TV IO93 (x3)
220445 -15 1983  WM4W MI0TMW R-12 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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