DL1SIS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN39

Receiver-side FT8 activity involving DL1SIS, decoded by SO8OO in southeastern Poland. 67 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-07-26.

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 67 FT8 messages attributed to DL1SIS 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 (88%), followed by 10 m (12%). Several six-hour UTC windows tied for the largest share (81%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

67
Messages attributed
5
UTC dates decoded
16
Active 15-min windows
-16 dB
Estimated median S/N

Bands

20m · 59 10m · 8
First attributed message: 2026-06-14
Last attributed message: 2026-07-26 07:14 UTC

Observed FT8 message patterns

Attributed sample
67 messages
Active dates
5 UTC dates
Estimated median S/N
-16 dB
Estimated 10th-90th percentile
-21 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 38, moderate (-15 to -9 dB) 27, 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 DL1SIS 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 DL1SIS

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
JN39 · 29 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,063 km (approx.)
Last such locator decoded
2026-07-26 06:57 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 UTCBandDL1SIS S/NCounterpartCounterpart S/NMsgsCapture
07-26 07:13 20m -21 / - F5PBG -14 / -10 5 Partial capture
07-26 06:58 20m -18 / - UR4QWW - / -21 4 Partial capture
07-26 06:56 20m -13 / -9 F4LNM -12 / - 3 ✓ Full exchange observed
07-26 06:54 20m - / -8 R3EDI -12 / - 2 ✓ Closing fragment
07-26 06:50 20m -22 / - IZ8EDI - / -14 2 ✓ Closing fragment
07-26 06:46 20m - / +3 LZ3CB +5 / - 2 ✓ Closing fragment
07-26 06:37 20m -16 / -3 G3ZQQ -13 / -2 5 Partial capture
07-26 06:35 20m -12 / - HK3W - / -16 2 ✓ Closing fragment
07-26 06:34 20m -12 / - RX3ASQ - / -1 2 ✓ Closing fragment
07-25 17:51 20m - / -5 PD1DRE -14 / - 2 ✓ Closing fragment
07-25 17:45 20m -12 / - PD1HBL - / -5 3 ✓ Closing fragment
07-25 17:08 20m - / -6 DK7XD -11 / - 3 ✓ Closing fragment
07-25 17:01 20m - / -18 PD3FR -7 / - 3 Partial capture
07-19 07:01 20m - / +9 F1PSX -16 / - 3 ✓ Closing fragment
07-19 06:57 20m -20 / +1 S57CT -12 / - 4 ✓ Closing observed
07-19 06:40 20m - / -13 F5HNQ -7 / - 3 ✓ Closing fragment
07-19 06:28 20m -14 / - UB2FEH - / +1 2 ✓ Closing fragment
07-19 06:23 20m - / -11 R5AV -12 / - 2 ✓ Closing fragment
07-19 06:21 20m -17 / -3 IU0TPA -4 / - 5 ✓ Full exchange observed
07-19 06:16 20m -16 / - F5RRS -18 / -10 3 Partial capture
07-19 05:56 20m -18 / - KA4DQJ - / -25 5 Partial capture
07-19 05:47 20m -19 / -13 IW2DNI -9 / - 4 ✓ Closing observed
07-18 18:39 40m - / -23 DL7ACA -12 / - 2 ✓ Closing fragment
07-12 16:09 20m - / - R2AL +4 / - 2 Partial capture
07-12 16:03 20m - / - R2AL +1 / - 3 Partial capture
07-05 16:51 20m - / -19 IQ4JO -12 / - 2 ✓ Closing fragment
06-23 17:59 20m - / - LZ3CB +10 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
065615 -13 1158  F4LNM DL1SIS +23
065630 -13 1159  DL1SIS F4LNM R-09 (x2)
065715 -17 1158  CQ DL1SIS JN39 (x2)
065815 -21 1158  UR4QWW DL1SIS -21 (x4)
071245 -20 1820  HK3W DL1SIS RR73
071300 -14 1820  DL1SIS F5PBG IN78 (x4)
071445 -21 1820  F5PBG DL1SIS -10
40m 
UTC    dB Audio  Message
183930 -13 1253  DL1SIS DL7ACA R-23 (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.

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