AB4SF — 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: FM17

Receiver-side FT8 activity involving AB4SF, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-17 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 33 FT8 messages attributed to AB4SF as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (76%), followed by 160 m (21%) and 40 m (3%). Most decodes (100%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (61%); the estimated median was -19 dB.

Overview

33
Messages attributed
10
UTC dates decoded
13
Active 15-min windows
-19 dB
Estimated median S/N

Bands

160m · 7 80m · 25 40m · 1
First attributed message: 2026-06-17
Last attributed message: 2026-10-22 02:21 UTC

Observed FT8 message patterns

Attributed sample
33 messages
Active dates
10 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-24 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 11, 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 AB4SF 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 AB4SF

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
FM17 · 11 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,470 km (approx.)
Last such locator decoded
2026-10-22 02:16 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 UTCBandAB4SF S/NCounterpartCounterpart S/NMsgsCapture
10-23 02:44 80m - / -13 SV8JE +13 / - 3 ✓ Closing fragment
10-23 02:42 80m - / -18 UT7EV +7 / - 2 ✓ Closing fragment
10-22 02:28 160m - / - F4EGM -14 / - 2 Partial capture
10-22 02:26 160m - / -19 DK7ZT +7 / - 5 Partial capture
10-22 02:26 80m - / -10 DL1MC +20 / - 2 Partial capture
10-22 02:17 80m -12 / - SP7ENW +11 / -23 2 Partial capture
10-22 02:17 80m - / - OE4AAC +14 / - 3 Partial capture
10-22 02:16 80m -10 / - WA4MB - / -12 2 ✓ Closing fragment
10-22 02:16 80m -13 / -23 S57SWR +20 / -4 6 ✓ Full exchange observed
10-22 02:15 80m -12 / - OK1AMF +23 / - 2 ✓ Closing observed
10-22 02:09 80m -6 / +2 UX5UO +26 / -9 4 ✓ Full exchange observed
10-21 01:07 160m - / - F4UJU -3 / - 2 Partial capture
10-20 23:39 80m - / -15 9A5E +14 / - 5 ✓ Closing fragment
10-07 04:36 160m - / - ON8DM +11 / - 3 Partial capture
10-07 04:28 80m - / -14 HA7TM +22 / - 3 ✓ Closing fragment
10-07 04:26 80m - / -14 LY5A +8 / - 2 ✓ Closing fragment
10-07 04:24 80m -18 / - KK6BB - / -9 2 Partial capture
10-07 04:22 80m -24 / - N4PGW - / -14 2 ✓ Closing fragment
10-07 04:21 80m - / -14 GU4WRP -8 / - 2 ✓ Closing fragment
10-07 04:17 80m - / -25 ON7GB +14 / - 4 ✓ Closing fragment
10-07 04:08 80m - / -19 MI0NWA -2 / - 2 ✓ Closing fragment
10-01 03:58 160m - / -11 DL3IAE 0 / - 3 ✓ Closing fragment
10-01 03:57 160m - / - HB9HFN -14 / - 4 Partial capture
10-01 03:55 160m - / - DL1MC -13 / - 6 Partial capture
10-01 03:43 160m - / - SP3PLD +6 / - 4 Partial capture
10-01 03:34 160m - / - HB9HFN -10 / - 2 Partial capture
10-01 03:26 160m - / - PA3DUU -14 / - 6 Partial capture
10-01 03:25 160m - / - RA3QTT -17 / - 5 Partial capture
10-01 03:23 160m - / - RU3FM -18 / - 10 Partial capture
10-01 03:23 160m -20 / -12 S53F +5 / - 4 ✓ Closing observed
10-01 03:22 160m -22 / -17 LY7M +12 / - 13 ✓ Closing observed
10-01 03:22 160m - / - DL1MC -4 / - 3 Partial capture
10-01 03:13 160m - / -11 DF2GH +6 / - 4 ✓ Closing fragment
10-01 03:13 160m - / - SP3PLD +16 / - 2 Partial capture
10-01 03:12 160m - / - DD7EE -10 / - 2 Partial capture
10-01 03:12 160m - / - DL1MC +1 / - 3 Partial capture
10-01 03:11 160m - / - HB9HFN -1 / - 8 Partial capture
10-01 03:10 160m - / -13 S53F +8 / - 4 Partial capture
10-01 03:10 160m - / -12 SV8CKM +7 / - 7 ✓ Closing fragment
10-01 00:38 160m - / - LA9JKA -5 / - 3 Partial capture
10-01 00:26 160m - / - SM2LIY +15 / - 9 Partial capture
10-01 00:02 160m - / -8 DL1RWN +17 / - 3 ✓ Closing fragment
09-24 05:30 80m - / -13 DL3OCF 0 / - 4 ✓ Closing fragment
09-24 04:46 80m - / -15 MI0OBC -11 / - 2 ✓ Closing fragment
09-24 04:45 80m - / -8 HB9TRR -1 / - 2 ✓ Closing fragment
09-24 04:12 80m - / -13 HB9TRR 0 / - 2 Partial capture
09-24 04:10 80m - / - DL1UDO -4 / - 2 Partial capture
09-24 04:06 80m - / -9 EA3DIX +6 / - 6 ✓ Closing fragment
09-24 04:02 80m - / -12 F4FSY -12 / - 2 ✓ Closing fragment
09-24 00:30 80m - / -12 OH5BM -5 / - 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
021730 +18 1393  AB4SF OE4AAC JN86
021745 -13 1181  S57SWR AB4SF R-04
021800 +20 1574  AB4SF S57SWR RR73
021800  +3 1434  AB4SF DL9KM JN68
021815 -14 1181  S57SWR AB4SF 73
021845 -12 1181  SP7ENW AB4SF -23
021900  +8 1392  AB4SF OE4AAC JN86
022115 -13 1182  N8PFK AB4SF RR73
022645 +19 1571  AB4SF DL1MC -10 (x2)
024200  +4 2164  AB4SF UT7EV -18 (x2)
024430 +14  254  AB4SF SV8JE KM08 (x3)
160m 
UTC    dB Audio  Message
035900  -1 2663  AB4SF DL3IAE -09
035930 -14 2449  AB4SF HB9HFN JN36
035930  +1 2663  AB4SF DL3IAE RR73
043600 +13  790  AB4SF ON8DM JO10 (x3)
010700  -3 2676  AB4SF F4UJU JN06 (x2)
022645  +4  824  AB4SF DK7ZT -19 (x3)
022815 -15 1252  AB4SF F4EGM JN29
022815  +6  824  AB4SF DK7ZT -19 (x2)
023015 -14 1102  AB4SF F4EGM JN29
40m 
UTC    dB Audio  Message
222900 -12 1168  AB4SF HB10GBT -20
224745 -14 2314  AB4SF IK6DLK 73
222115  -5  954  AB4SF PI4DX -11 (x2)
012830  +0 1729  AB4SF HZ1TT -14 (x3)
232115  -6 2346  AB4SF F5PBG R-10 (x3)
234545 -11  607  GX3RAF/P AB4SF R+10

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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