S53F — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S53F, decoded by SO8OO in southeastern Poland. 217 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-08-07 and 2026-09-16.
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 217 FT8 messages attributed to S53F as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (53%), followed by 160 m (24%) and 80 m (17%). Most decodes (72%) fell within the six-hour window 03:00-09:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -5 dB.
Overview
Bands
Last attributed message: 2026-09-16 05:00 UTC
Observed FT8 message patterns
- Attributed sample
- 217 messages
- Active dates
- 10 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -19 to +7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 33, strong (≥ -8 dB) 145.
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 S53F 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 S53F
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
- JN75 · 77 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 708 km (approx.)
- Last such locator decoded
- 2026-09-09 20:03 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 | S53F S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-16 04:59 | 80m | 0 / - | EB3JT | - / -10 | 3 | ✓ Closing fragment |
| 09-16 04:57 | 80m | -2 / -6 | F5MYK | -23 / -11 | 5 | ✓ Full exchange observed |
| 09-16 04:57 | 80m | -4 / - | VP2MAA | - / -12 | 2 | ✓ Closing fragment |
| 09-12 05:02 | 40m | +9 / - | D44TWO | - / -5 | 3 | Partial capture |
| 09-12 04:54 | 40m | +14 / - | D44TWO | - / -5 | 6 | Partial capture |
| 09-12 04:41 | 40m | +2 / - | J38LD | - / -7 | 2 | Partial capture |
| 09-12 04:35 | 40m | +4 / - | J38DX | - / -9 | 7 | ✓ Closing fragment |
| 09-12 04:24 | 60m | -24 / -16 | DL5DQZ | 0 / -1 | 6 | ✓ Full exchange observed |
| 09-12 04:22 | 60m | -17 / -21 | VE2CKW | -13 / +5 | 7 | ✓ Full exchange observed |
| 09-12 04:12 | 60m | - / -16 | K1CF | -8 / - | 3 | ✓ Closing fragment |
| 09-12 04:11 | 60m | - / - | F5OYA/P | -11 / - | 4 | Partial capture |
| 09-09 20:07 | 160m | 0 / -1 | YO2MTG | -5 / -1 | 5 | ✓ Full exchange observed |
| 09-09 20:05 | 160m | +4 / -10 | EA3A | -16 / -8 | 6 | ✓ Full exchange observed |
| 09-09 20:05 | 160m | +3 / +6 | DB3OI | -14 / -11 | 5 | ✓ Full exchange observed |
| 09-09 20:05 | 160m | - / - | DG0JK | 0 / - | 2 | Partial capture |
| 09-09 20:04 | 160m | - / - | PA3FR | -5 / - | 5 | Partial capture |
| 09-09 20:04 | 160m | +2 / -2 | SP5EXA | +11 / +2 | 5 | ✓ Full exchange observed |
| 09-09 19:52 | 60m | - / -4 | 9A4ZM | -1 / - | 3 | ✓ Closing fragment |
| 09-09 19:50 | 60m | - / -3 | YO6LM | +4 / - | 3 | ✓ Closing fragment |
| 09-02 20:47 | 40m | +14 / - | RI1FJL | - / -5 | 6 | Partial capture |
| 09-02 20:30 | 80m | +7 / -19 | PE1NPS | +1 / - | 4 | ✓ Closing observed |
| 09-02 20:26 | 80m | -1 / -9 | 5Z4VJ | -14 / -14 | 7 | ✓ Full exchange observed |
| 09-02 20:25 | 80m | -4 / -9 | JH4ADV | -6 / -8 | 5 | ✓ Full exchange observed |
| 09-02 19:56 | 80m | 0 / - | RI1FJL | - / -15 | 2 | Partial capture |
| 09-02 19:52 | 80m | -11 / - | V51WH | - / -23 | 3 | Partial capture |
| 09-02 19:49 | 80m | -6 / - | RI1FJL | - / - | 4 | Partial capture |
| 09-02 19:44 | 80m | -4 / - | RI1FJL | - / - | 3 | Partial capture |
| 08-31 18:23 | 40m | +5 / - | RI1FJL | - / - | 4 | Partial capture |
| 08-30 11:57 | 20m | -4 / - | PA2AMJ | -20 / - | 4 | ✓ Closing observed |
| 08-30 11:57 | 20m | -2 / -12 | PD9FLX | -8 / - | 3 | ✓ Closing observed |
| 08-30 11:56 | 20m | -10 / -9 | RX6DA | +2 / - | 3 | Partial capture |
| 08-30 04:34 | 40m | -24 / -10 | OA4ENG | -18 / - | 3 | ✓ Closing observed |
| 08-30 04:31 | 40m | -20 / - | XE1PM | - / - | 3 | Partial capture |
| 08-30 04:26 | 40m | -19 / -3 | LZ2VQ | -12 / - | 4 | Partial capture |
| 08-30 04:24 | 40m | -18 / -13 | R4FBT | -11 / - | 5 | ✓ Closing observed |
| 08-30 04:23 | 40m | -15 / - | KD8LO | - / - | 2 | ✓ Closing fragment |
| 08-30 04:21 | 40m | -14 / - | R6DVV | -11 / - | 2 | ✓ Closing observed |
| 08-30 04:20 | 40m | -18 / - | UB3DQR | -14 / - | 4 | ✓ Closing observed |
| 08-30 04:17 | 40m | -18 / - | ES2AJ | +4 / - | 7 | ✓ Closing observed |
| 08-30 04:16 | 40m | -18 / - | XE1PM | - / - | 3 | Partial capture |
| 08-30 04:13 | 40m | -10 / - | KR4NRR | - / - | 4 | Partial capture |
| 08-30 04:11 | 40m | -8 / - | CT2GQA | - / - | 2 | ✓ Closing fragment |
| 08-30 04:10 | 40m | -7 / - | WA2SEM | - / - | 2 | ✓ Closing fragment |
| 08-30 04:10 | 160m | -2 / - | F4VTR | - / - | 2 | ✓ Closing fragment |
| 08-30 04:07 | 40m | -5 / - | R3DMS | -5 / - | 6 | ✓ Closing observed |
| 08-30 04:07 | 160m | -10 / - | KM1W | - / - | 2 | Partial capture |
| 08-30 04:06 | 40m | -7 / - | PS8RV | -12 / - | 7 | ✓ Closing observed |
| 08-30 04:05 | 160m | -4 / - | YO9HP | +8 / - | 4 | ✓ Closing observed |
| 08-30 04:05 | 40m | -8 / - | W3IF | - / - | 2 | ✓ Closing fragment |
| 08-30 04:03 | 40m | -9 / - | OK1WCF | - / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 203000 -14 2359 S53F 5Z4VJ 73 203030 +1 2418 S53F PE1NPS R-19 203045 +7 2220 PE1NPS S53F RR73 203100 +1 2418 S53F PE1NPS 73 045700 -5 1031 VP2MAA S53F -12 (x2) 045745 -24 2363 S53F F5MYK IN97 045800 -3 1031 F5MYK S53F -11 045815 -22 2364 S53F F5MYK R-06 045830 +0 1030 F5MYK S53F RR73 045845 -24 2364 S53F F5MYK 73 045915 -17 1016 S53F F4LTX IN95 045930 +1 1030 EB3JT S53F -10 (x3)
UTC dB Audio Message 044030 +6 2550 J38DX S53F RR73 044045 -15 1494 S53F UR9QQ KN77 044130 +4 2379 J38LD S53F -07 (x2) 044230 -3 2379 F5PBG S53F -05 045445 +13 933 D44TWO S53F -05 (x9) 205315 -10 1535 S53F PD0LBY 73
UTC dB Audio Message 041345 -17 2230 S53F F5OYA/P JN13 042000 -14 493 HC5F S53F -04 042200 -17 1324 VE2CKW S53F +05 042215 -12 889 S53F VE2CKW R-21 042230 -20 1324 VE2CKW S53F RR73 042245 -12 889 S53F VE2CKW R-21 042300 -13 1324 VE2CKW S53F RR73 042315 -13 889 S53F VE2CKW R-21 (x2) 042415 +0 1238 S53F DL5DQZ JO61 042430 -24 1346 DL5DQZ S53F -01 042445 +0 1238 S53F DL5DQZ JO61 042500 -24 1346 DL5DQZ S53F +06 042515 -1 1238 S53F DL5DQZ R-16 (x2)
UTC dB Audio Message 200530 -16 2087 S53F DB3OI R+06 200545 +3 1112 DB3OI S53F RR73 200600 -7 1060 S53F PA3FR JO33 200600 -17 2300 S53F EA3A JN01 200600 -15 2087 S53F DB3OI 73 200615 +4 1112 EA3A S53F -08 200630 -14 2300 S53F EA3A R-10 200645 +5 1112 EA3A S53F RR73 200700 -13 2300 S53F EA3A 73 200730 -4 1807 S53F YO2MTG KN05 200745 -1 1112 YO2MTG S53F -01 200800 -6 1807 S53F YO2MTG R-01 200815 +1 1112 YO2MTG S53F RR73 200830 -5 1807 S53F YO2MTG 73 201030 -19 256 S53F 4L7T LN21
UTC dB Audio Message 080115 -2 1389 S52W S53F +06 204845 -1 1405 VY2SHL S53F JN75 205415 -13 1305 S53F PP7GB -14 (x2) 115615 -10 1882 RX6DA S53F JN75 115700 +5 1194 S53F RX6DA -09 (x2) 115730 -10 2351 S53F PD9FLX JO22 115730 -20 1881 S53F PA2AMJ JO33 115800 -5 2350 S53F PD9FLX -12 115815 -2 1882 PD9FLX S53F 73 115830 -20 1881 S53F PA2AMJ JO33 115845 -3 1882 PA2AMJ S53F R JN75 (x2)
UTC dB Audio Message 135330 -17 2329 S53F PE1NPS JO22 (x2) 135930 -11 1493 S53F DN9AD JO52 (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.
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