IS0CDO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IS0CDO, decoded by SO8OO in southeastern Poland. 19 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-14 and 2026-09-18.
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 19 FT8 messages attributed to IS0CDO 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 (68%), followed by 60 m (26%) and 40 m (5%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-18 18:50 UTC
Observed FT8 message patterns
- Attributed sample
- 19 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -11 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 5.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with IS0CDO 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 IS0CDO
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
- JN40
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,447 km (approx.)
- Last such locator decoded
- 2026-07-25 18:54 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 UTC | Band | IS0CDO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 18:50 | 60m | - / - | DL5CG | -4 / - | 2 | Partial capture |
| 09-18 18:50 | 60m | - / - | HB9HFM | -7 / - | 4 | Partial capture |
| 09-18 18:49 | 60m | -16 / -18 | E79D | +4 / - | 4 | ✓ Closing observed |
| 09-18 18:48 | 60m | -18 / -15 | ON7KEI | -19 / - | 4 | ✓ Closing observed |
| 09-18 17:30 | 60m | - / -7 | IK4CBO | -10 / - | 2 | ✓ Closing fragment |
| 09-18 17:27 | 60m | - / -10 | IZ0PAP | -3 / - | 5 | ✓ Closing fragment |
| 09-18 17:24 | 60m | -10 / 0 | IK2TPX | -9 / - | 4 | ✓ Closing observed |
| 09-18 17:24 | 60m | - / -5 | PA7PYR | -9 / - | 6 | ✓ Closing fragment |
| 09-18 17:14 | 60m | - / +2 | IK2SND | -10 / - | 4 | Partial capture |
| 09-18 17:13 | 60m | -22 / -5 | DF3IS | -5 / -4 | 4 | ✓ Full exchange observed |
| 09-18 16:58 | 60m | - / -16 | SP5JMA | +7 / - | 7 | ✓ Closing fragment |
| 09-18 16:57 | 60m | - / -12 | DL6ZXG | -7 / - | 4 | ✓ Closing fragment |
| 09-18 16:56 | 60m | - / -3 | F5RMK | -20 / - | 2 | ✓ Closing fragment |
| 07-31 20:02 | 40m | -12 / -15 | A71UN | -7 / -6 | 2 | Partial capture |
| 07-31 19:13 | 40m | - / - | R2AL | +2 / - | 4 | Partial capture |
| 07-25 18:54 | 20m | -7 / - | C91RU | - / -13 | 3 | ✓ Closing fragment |
| 07-15 16:09 | 20m | -10 / - | G0RVY | - / -16 | 2 | ✓ Closing fragment |
| 07-15 16:08 | 20m | -8 / - | DL0GEO | - / -6 | 2 | ✓ Closing fragment |
| 07-15 15:42 | 20m | - / -15 | RX7T | 0 / - | 2 | ✓ Closing fragment |
| 07-15 15:36 | 20m | -23 / - | G5MJF | -20 / - | 10 | ✓ Closing observed |
| 07-14 16:10 | 20m | - / +3 | HB9CFU | -8 / - | 3 | Partial capture |
| 07-14 07:52 | 20m | - / - | OE2VDL | -18 / - | 4 | Partial capture |
| 07-14 07:46 | 20m | - / +3 | E70SZ | -8 / - | 4 | Partial capture |
| 07-14 07:46 | 20m | - / -4 | LZ3CB | +2 / - | 3 | ✓ Closing fragment |
| 07-14 07:41 | 20m | - / 0 | IQ4JO | +1 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 184815 -17 1373 IS0CDO ON7KEI JO21 184815 -9 1227 IS0CDO DL4YDR JO32 184845 -21 1373 IS0CDO ON7KEI R-15 184900 -18 1372 ON7KEI IS0CDO RR73 184915 -18 1372 IS0CDO ON7KEI 73 184915 +2 982 IS0CDO E79D JN93 (x2) 185000 -16 982 E79D IS0CDO RR73 185015 +6 982 IS0CDO E79D 73 185045 -9 1834 IS0CDO HB9HFM JN36 185045 -3 1228 IS0CDO DL5CG JO64 185115 -4 1834 IS0CDO HB9HFM JN36 185115 -4 1228 IS0CDO DL5CG JO64 185145 -7 1834 IS0CDO HB9HFM JN36 (x2)
UTC dB Audio Message 191300 +2 656 IS0CDO R2AL KO85 (x4) 200200 -7 2625 IS0CDO A71UN -15 200215 -12 2625 A71UN IS0CDO R-06
UTC dB Audio Message 154145 -24 1912 IS0CDO G5MJF RR73 154200 -23 1913 G5MJF IS0CDO 73 154215 +2 2270 IS0CDO RX7T -15 (x2) 154430 -14 2440 PD0FEW IS0CDO RR73 160800 -11 2228 DL0GEO IS0CDO -06 (x2) 160900 -12 1001 G0RVY IS0CDO -16 (x2) 182315 -24 1652 IS0CDO SM7DVO R-07 185445 -8 851 C91RU IS0CDO JN40 (x3) 185700 -24 2079 IS0CDO EA5GQB 185745 -8 852 SQ9CXH IS0CDO RR73
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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