YC1GDF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Indonesia Most frequent locator attributed to this token: OI33

Receiver-side FT8 activity involving YC1GDF, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-24.

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 21 FT8 messages attributed to YC1GDF 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 (95%), followed by 10 m (5%). Most decodes (52%) fell within the six-hour window 09:00-15:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (90%); the estimated median was -23 dB.

Overview

21
Messages attributed
5
UTC dates decoded
7
Active 15-min windows
-23 dB
Estimated median S/N

Bands

20m · 20 10m · 1
First attributed message: 2026-06-07
Last attributed message: 2026-08-24 14:23 UTC

Observed FT8 message patterns

Attributed sample
21 messages
Active dates
5 UTC dates
Estimated median S/N
-23 dB
Estimated 10th-90th percentile
-24 to -18 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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 YC1GDF in decoded directed-looking exchanges:

Most frequent locator attributed to YC1GDF

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
OI33 · 12 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
10,219 km (approx.)
Last such locator decoded
2026-08-24 14:23 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 UTCBandYC1GDF S/NCounterpartCounterpart S/NMsgsCapture
09-01 23:02 40m - / - SP5MXW/P -19 / - 2 Partial capture
09-01 23:00 40m - / - G7KCK -12 / - 5 Partial capture
09-01 22:59 40m - / - R3PJV +2 / - 6 Partial capture
09-01 22:59 40m - / - SP5MXW/P -18 / - 2 Partial capture
08-24 15:32 20m - / -22 DL1GLO -3 / - 4 ✓ Closing fragment
08-24 14:23 20m -24 / - N3RC - / - 2 Partial capture
08-23 15:56 20m - / - E77FN -12 / - 3 ✓ Closing fragment
08-23 15:30 20m - / -15 ON4AOI -3 / - 2 ✓ Closing fragment
08-20 13:35 20m - / -12 UN0PA -16 / - 2 ✓ Closing fragment
08-14 23:24 20m - / - DH2RL -12 / - 5 Partial capture
08-04 13:27 20m - / - M0PTZ -9 / - 5 Partial capture
08-02 01:10 20m - / -5 CT7AUT -11 / - 2 ✓ Closing fragment
07-23 09:11 20m - / - DL1R -4 / - 8 Partial capture
07-22 22:47 40m - / -15 LB7ZG -18 / - 2 ✓ Closing fragment
07-22 22:36 40m - / - IV3KQE -12 / - 6 Partial capture
07-22 22:36 40m - / - DK9WI -3 / - 8 Partial capture
07-22 22:34 40m - / - 9A7BB -16 / - 7 Partial capture
07-22 22:33 40m - / - LB7ZG -10 / - 3 Partial capture
07-21 09:46 20m - / - GM0MAK -2 / - 2 Partial capture
07-19 22:31 40m - / -19 RX3ASQ -16 / - 2 ✓ Closing fragment
07-07 23:19 20m - / - CT1EEX -6 / - 3 Partial capture
07-06 20:25 40m - / -16 9A1BTU -10 / - 3 ✓ Closing fragment
07-05 22:59 40m - / -15 PI4DX -2 / - 2 ✓ Closing fragment
06-29 00:21 20m - / -19 EA5ISM -18 / - 2 ✓ Closing fragment
06-25 14:24 20m - / - DL9GUA -16 / - 2 Partial capture
06-25 14:07 20m - / - DG0OME -6 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
225900 -17 1143  YC1GDF SP5MXW/P KO02 (x2)
225930  -3  880  YC1GDF R3PJV KO94 (x3)
230030 -13 1456  YC1GDF G7KCK IO82
230100  +3  880  YC1GDF R3PJV KO94 (x2)
230130 -12 1456  YC1GDF G7KCK IO82
230200 -18 1142  YC1GDF SP5MXW/P KO02
230200  +1  880  YC1GDF R3PJV KO94
230200 -11 1457  YC1GDF G7KCK IO82
230230 -20 1143  YC1GDF SP5MXW/P KO02
230300 -13 1456  YC1GDF G7KCK IO82 (x2)
20m 
UTC    dB Audio  Message
153030  -4  604  YC1GDF ON4AOI -15 (x2)
153400 -18 2104  YC1GDF R8CGT -16
154000  -8 2551  YC1GDF DK5US RR73
155615 -13 1439  YC1GDF E77FN JN93 (x3)
132145 -11 1607  YC1GDF OZ7BFC JO55
142300 -24 1357  N3RC YC1GDF OI33 (x2)
152645  -6 2807  YC1GDF IH9YMC -15
153245  +0 2540  YC1GDF DL1GLO JN47 (x4)

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