RK0SC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Asiatic Russia Most frequent locator attributed to this token: OO26

Receiver-side FT8 activity involving RK0SC, decoded by SO8OO in southeastern Poland. 585 FT8 messages attributed to this token as transmitter, on 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-07-29.

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 585 FT8 messages attributed to RK0SC as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). The busiest six-hour window was 22:00-04:00 UTC, containing 50% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.8 dB.

Overview

585
Messages attributed
15
UTC dates decoded
95
Active 15-min windows
-10.8 dB
Estimated median S/N

Bands

First attributed message: 2026-06-07
Last attributed message: 2026-07-29 21:24 UTC

Observed FT8 message patterns

Attributed sample
585 messages
Active dates
15 UTC dates
Estimated median S/N
-10.8 dB
Estimated 10th-90th percentile
-16 to -4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 86, moderate (-15 to -9 dB) 306, strong (≥ -8 dB) 193.

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.

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 RK0SC

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
OO26 · 440 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
5,242 km (approx.)
Last such locator decoded
2026-07-29 21:24 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 UTCBandRK0SC S/NCounterpartCounterpart S/NMsgsCapture
09-19 20:49 80m - / -24 UA1CEI +12 / - 3 ✓ Closing fragment
09-19 20:47 80m - / - S57BTI -5 / - 2 Partial capture
09-19 20:44 80m - / - RA3YDA 0 / - 2 Partial capture
09-19 20:43 80m - / -19 RM5F -6 / - 2 ✓ Closing fragment
09-19 20:38 80m - / -18 DK3UA +9 / - 6 ✓ Closing fragment
09-19 20:27 80m - / -19 R2HM +10 / - 4 ✓ Closing fragment
09-19 20:21 80m - / -23 UC6D +10 / - 2 ✓ Closing fragment
09-19 20:05 80m - / -20 I1RJP +13 / - 3 ✓ Closing fragment
09-19 19:58 80m - / - DD6WF +10 / - 2 Partial capture
09-19 19:58 80m - / - I1RJP +2 / - 8 Partial capture
09-19 19:51 80m - / - UA4UAR -4 / - 5 Partial capture
09-19 19:45 80m - / - UA1CEI +12 / - 2 Partial capture
09-19 19:35 80m - / - UA1CEI +9 / - 9 Partial capture
09-19 18:42 80m - / -12 R2EC -2 / - 9 ✓ Closing fragment
09-19 18:14 80m - / -20 ON4IQ +9 / - 2 ✓ Closing fragment
09-19 18:05 80m - / -23 R4RJ -10 / - 3 ✓ Closing fragment
09-19 17:54 80m - / -25 R7CD +10 / - 2 ✓ Closing fragment
09-19 17:52 80m - / - DK1BN +3 / - 7 Partial capture
09-19 17:48 80m - / - IZ1BII -5 / - 7 Partial capture
09-19 16:31 80m - / -21 R6ZEJ -3 / - 5 Partial capture
09-19 16:31 80m - / - RM5F -10 / - 2 Partial capture
09-19 16:27 80m - / - RM5F -1 / - 2 Partial capture
09-19 16:22 80m - / -13 RN3TT -12 / - 2 ✓ Closing fragment
09-19 16:17 80m - / -10 RW3LL +15 / - 3 ✓ Closing fragment
09-19 16:11 80m - / -15 OH2ZZ -5 / - 3 ✓ Closing fragment
09-19 16:09 80m - / -20 EU7A 0 / - 4 ✓ Closing fragment
09-19 15:55 80m - / -19 RC3D +10 / - 2 ✓ Closing fragment
09-19 15:53 80m - / -18 RC1TF -3 / - 2 Partial capture
09-19 15:53 80m - / -15 UA3EDQ +7 / - 3 ✓ Closing fragment
09-19 15:47 80m - / -21 RK4PR -19 / - 2 ✓ Closing fragment
09-19 15:32 80m - / -7 R7LV +9 / - 3 ✓ Closing fragment
09-19 15:27 80m - / - UA1OIZ -7 / - 2 Partial capture
09-19 15:22 80m - / -9 RA7T +2 / - 3 ✓ Closing fragment
09-19 15:22 80m - / - YO9IJP +2 / - 10 Partial capture
09-19 14:20 80m - / -4 RA3DA -11 / - 3 ✓ Closing fragment
09-19 14:18 80m - / - RY3D -12 / - 2 ✓ Closing fragment
09-17 14:10 40m - / -14 RK6MC -1 / - 2 ✓ Closing fragment
09-16 22:26 80m - / -13 RA3WY -7 / - 3 ✓ Closing fragment
09-16 22:20 80m - / -21 R4FV 0 / - 3 ✓ Closing fragment
09-16 22:03 80m - / - RO2X +4 / - 2 ✓ Closing fragment
09-16 21:46 80m - / -26 RA3RDN -3 / - 3 ✓ Closing fragment
09-16 21:42 80m - / - R5DT +4 / - 2 Partial capture
09-16 21:37 80m - / - PSE30M +17 / - 2 Partial capture
09-16 21:34 80m - / -18 IZ0COC +9 / - 3 ✓ Closing fragment
09-16 21:30 80m - / -19 IK0HBN +11 / - 5 ✓ Closing fragment
09-16 21:27 80m - / - UB3ANV -10 / - 2 Partial capture
09-16 20:52 80m - / -16 UA6JQ -5 / - 2 ✓ Closing fragment
09-14 22:13 80m - / -17 R7KQ +11 / - 3 ✓ Closing fragment
09-14 22:12 80m - / -19 RA7KW +18 / - 2 ✓ Closing fragment
09-14 22:10 80m - / -21 RU6K +11 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m
UTC    dB Audio  Message
203815  +9 2550  RK0SC DK3UA JO64 (x6)
204345  -8 1641  RK0SC RM5F R-19 (x2)
204415  +2 2789  RK0SC RA3YDA KO62 (x2)
204715  -5 1047  RK0SC S57BTI JN75 (x2)
204915  +9 2791  RK0SC UA1CEI KP50 (x3)
40m
UTC    dB Audio  Message
144130  +4  930  RK0SC RA3AJT -12 (x2)
135830 -15  722  RK0SC R3ZCE KO80
140345 -13 1685  RK0SC R1943OD -13
143615 -16  935  RK0SC RK4PR RR73
144930  -4 2212  RK0SC RA3DFQ -15 (x3)
145100  -5 2212  RK0SC TNX 73
145115  -8  851  RK0SC RW3PI -16 (x2)
004545 -24 2036  RK0SC RO6G -17
141045  -2 1041  RK0SC RK6MC -14 (x2)
141915 -16  735  RK0SC R4CQ LO31
20m
UTC    dB Audio  Message
222245 -10  769  RK0SC DL1EDR JO41 (x4)
223215 -13  769  RK0SC PA3ANZ JO22 (x4)
233815 -15 2543  RK0SC RA3DA KO95 (x5)
004545  -9  768  RK0SC DG5PW JO30 (x2)
10m
UTC    dB Audio  Message
094715  +9  721  RK0SC S59MA JN76 (x15)

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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