OK1SLM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JO70

Receiver-side FT8 activity involving OK1SLM, decoded by SO8OO in southeastern Poland. 41 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-08-08.

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 41 FT8 messages attributed to OK1SLM as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (83%); the estimated median was -5 dB.

Overview

41
Messages attributed
4
UTC dates decoded
7
Active 15-min windows
-5 dB
Estimated median S/N

Bands

20m · 41
First attributed message: 2026-06-27
Last attributed message: 2026-08-08 11:24 UTC

Observed FT8 message patterns

Attributed sample
41 messages
Active dates
4 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-9 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 34.

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 OK1SLM in decoded directed-looking exchanges:

Most frequent locator attributed to OK1SLM

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
JO70 · 32 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
487 km (approx.)
Last such locator decoded
2026-08-08 11:24 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 UTCBandOK1SLM S/NCounterpartCounterpart S/NMsgsCapture
08-08 11:20 20m -8 / - R5AV -9 / 0 2 ✓ Closing observed
08-08 11:19 20m -6 / - N2BJ - / - 2 Partial capture
08-08 11:07 20m -8 / - KD2AGW - / -21 2 Partial capture
08-08 08:09 20m - / - PD0PWH +3 / - 2 Partial capture
08-02 10:31 10m - / -21 EA8UP -16 / - 2 ✓ Closing fragment
07-30 09:45 20m - / - YO4GOU -5 / - 2 Partial capture
07-30 09:28 20m - / -24 ON6CQ -19 / - 5 Partial capture
07-30 09:24 20m - / -19 F4AWT -5 / - 2 Partial capture
07-30 09:19 20m - / -9 F1PBZ -12 / - 3 ✓ Closing fragment
07-30 09:11 20m - / -11 RZ4FWA -14 / - 4 ✓ Closing fragment
07-30 09:09 20m - / - DK7JR -11 / - 2 ✓ Closing fragment
07-25 09:38 10m - / - OZ3AAF -4 / - 2 Partial capture
07-25 09:07 10m - / -10 PD1HPB -10 / - 2 ✓ Closing fragment
07-25 09:06 10m - / - DL3MIB -12 / - 7 Partial capture
07-25 09:03 10m - / -14 E70SZ -19 / - 2 ✓ Closing fragment
07-24 13:11 20m - / -23 DL4JTH -3 / - 5 ✓ Closing fragment
07-24 13:05 20m - / -2 DH2RL -4 / - 3 ✓ Closing fragment
07-24 12:20 20m - / -15 PA3EMR -2 / - 2 ✓ Closing fragment
07-24 12:05 20m - / +1 OE6CLD -4 / - 3 ✓ Closing fragment
07-24 11:51 20m - / +10 F4HSB -22 / - 3 ✓ Closing fragment
07-24 11:46 20m - / -12 F1PBZ -9 / - 2 ✓ Closing fragment
07-24 11:46 20m - / - PA2KV -4 / - 8 Partial capture
07-22 08:16 20m - / -7 DL9KM -9 / - 5 ✓ Closing fragment
07-22 08:08 20m -3 / - F1IQH - / - 2 ✓ Closing fragment
07-11 10:26 20m -5 / - TA4SSK - / -18 3 ✓ Closing fragment
07-11 10:23 20m -7 / - LZ1KI -24 / - 2 ✓ Closing observed
07-11 10:15 20m - / +6 DJ8GS -10 / - 2 ✓ Closing fragment
06-27 07:43 20m -7 / - W7ZR - / - 5 Partial capture
06-27 07:37 20m -6 / - W7ZR - / - 5 Partial capture
06-27 07:30 20m -8 / - W7ZR - / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
080900  +5  511  OK1SLM PD0PWH JO21 (x2)
110745  -7  510  KD2AGW OK1SLM JO70 (x2)
111915  -4  510  N2BJ OK1SLM JO70 (x2)
112045  -8  510  R5AV OK1SLM R+00
112100  -9  512  OK1SLM R5AV RR73
112145  -5  510  CQ OK1SLM JO70 (x6)
112445  -4  510  UK8FCM OK1SLM JO70
10m 
UTC    dB Audio  Message
090330 -19 2010  OK1SLM E70SZ R-14 (x2)
090600 -10 1126  OK1SLM DL3MIB JN57 (x3)
090730 -11  511  OK1SLM PD1HPB R-10
090730 -13 1126  OK1SLM DL3MIB JN57
090800  -9  510  OK1SLM PD1HPB 73
090800 -11 1125  OK1SLM DL3MIB JN57 (x3)
093830  +0 2670  OK1SLM OZ3AAF +11 (x2)
103115 -16 1781  OK1SLM EA8UP -21 (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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