SI9YL — 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: Sweden Most frequent locator attributed to this token: JP82

Receiver-side FT8 activity involving SI9YL, decoded by SO8OO in southeastern Poland. 145 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-21.

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 145 FT8 messages attributed to SI9YL as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (84%), followed by 10 m (14%) and 40 m (1%). Most decodes (88%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

145
Messages attributed
8
UTC dates decoded
17
Active 15-min windows
-12 dB
Estimated median S/N

Bands

40m · 2 20m · 122 10m · 21
First attributed message: 2026-06-07
Last attributed message: 2026-10-21 17:34 UTC

Observed FT8 message patterns

Attributed sample
145 messages
Active dates
8 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-20 to 0 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 48, moderate (-15 to -9 dB) 54, strong (≥ -8 dB) 43.

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 SI9YL in decoded directed-looking exchanges:

Most frequent locator attributed to SI9YL

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
JP82 · 77 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,427 km (approx.)
Last such locator decoded
2026-10-21 17:16 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 UTCBandSI9YL S/NCounterpartCounterpart S/NMsgsCapture
10-28 16:22 40m - / -10 YL3ASK -17 / - 4 ✓ Closing fragment
10-28 16:18 40m - / - DG5MLA -5 / - 3 Partial capture
10-21 17:37 40m - / -4 DL5RDP +18 / - 3 ✓ Closing fragment
10-21 17:34 40m -19 / - G6MTI -13 / -6 2 ✓ Closing observed
10-21 17:31 40m - / - PD4RJ -16 / - 2 Partial capture
10-21 17:29 40m - / - PA2DX -10 / - 3 ✓ Closing fragment
10-21 17:22 40m - / - DL6RS 0 / - 2 Partial capture
10-21 17:22 40m - / - PH9OY -14 / - 2 ✓ Closing fragment
10-21 17:19 40m - / -14 RU3QR -10 / - 2 Partial capture
10-21 17:19 40m - / -13 F1PBZ -2 / - 2 ✓ Closing fragment
10-21 17:16 40m - / - OE2LEX +2 / - 4 Partial capture
08-27 14:01 20m 0 / - RI1FJL - / -16 24 Partial capture
08-27 13:42 20m -7 / - RI1FJL - / - 17 Partial capture
08-20 15:56 20m - / -10 PA1PXL -7 / - 3 ✓ Closing fragment
08-20 15:50 20m - / -18 RN6MA +8 / - 3 Partial capture
08-19 18:07 20m - / - F5PMF +1 / - 3 Partial capture
08-15 19:21 20m -16 / - F4HTA - / - 3 Partial capture
08-15 19:12 20m -10 / - XU7O - / -15 2 Partial capture
08-15 19:10 20m -10 / - BG7BVI - / -17 4 ✓ Closing fragment
08-15 19:08 20m -7 / - BA3NZ - / -5 3 ✓ Closing fragment
08-15 19:07 20m -10 / - M0CAT - / -7 2 Partial capture
08-15 19:06 20m -10 / - BG7BMG - / -22 2 Partial capture
08-15 19:03 20m -12 / - BH2WTV - / - 2 ✓ Closing fragment
08-15 19:00 20m -12 / - <...> - / - 2 Partial capture
08-11 18:59 40m - / - YO7ARZ -14 / - 4 Partial capture
08-11 18:57 40m - / -16 OZ/DG1ATN -20 / - 2 Partial capture
08-11 18:54 40m - / -12 SP7CKU -11 / - 2 Partial capture
08-11 18:01 10m - / +8 IK2XYI -14 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
173430 -19 1590  G6MTI SI9YL -06
173445 -11 1134  SI9YL R4CQ LO31
173515 -13  994  SI9YL G6MTI 73
173645  -4 2553  SI9YL UT7HX KN69
173745 +17 2983  SI9YL DL5RDP -04 (x3)
161745 -22 1338  SI9YL ON1DGN -14
161845  -3 1401  SI9YL DG5MLA JN58 (x3)
162215 -17 1340  SI9YL YL3ASK -10 (x4)
80m 
UTC    dB Audio  Message
155645  -6 1352  SI9YL RV3X KO84
20m 
UTC    dB Audio  Message
140545  -1 1293  RI1FJL SI9YL JP82 (x15)
10m 
UTC    dB Audio  Message
180100 -14 1722  SI9YL IK2XYI +08 (x2)

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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