SD5X — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving SD5X, decoded by SO8OO in southeastern Poland. 519 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-10.
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 519 FT8 messages attributed to SD5X as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (47%), followed by 80 m (27%) and 40 m (26%). Most decodes (98%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (96%); the estimated median was +4 dB.
Overview
Bands
Last attributed message: 2026-10-10 19:45 UTC
Observed FT8 message patterns
- Attributed sample
- 519 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- +4 dB
- Estimated 10th-90th percentile
- -5 to +12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 500.
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 SD5X 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 SD5X
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
- JO88 · 126 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,001 km (approx.)
- Last such locator decoded
- 2026-10-10 19:44 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 | SD5X S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-10 19:45 | 160m | -2 / - | DF6DOM | - / -11 | 2 | ✓ Closing fragment |
| 10-10 19:39 | 160m | +4 / - | SV5ADM | -18 / -27 | 3 | Partial capture |
| 10-10 19:38 | 160m | +4 / -18 | RA4Y | -6 / -4 | 8 | ✓ Full exchange observed |
| 10-10 19:37 | 160m | +9 / -5 | G0WSJ | -11 / -3 | 5 | ✓ Full exchange observed |
| 10-10 19:35 | 160m | +2 / - | F4EGM | - / -24 | 2 | Partial capture |
| 10-10 19:33 | 160m | 0 / -1 | R3ZP | -1 / - | 4 | ✓ Closing observed |
| 10-10 19:30 | 160m | +2 / -3 | HA7TM | +9 / - | 5 | ✓ Full exchange observed |
| 10-10 19:28 | 160m | +9 / -1 | UT7NY | +11 / - | 5 | ✓ Full exchange observed |
| 10-10 19:26 | 160m | +4 / +3 | DL2MCH | -6 / -2 | 3 | ✓ Full exchange observed |
| 10-10 19:24 | 160m | +4 / 0 | HG9FS | +2 / - | 4 | ✓ Full exchange observed |
| 10-10 19:24 | 160m | +8 / -3 | LY8O | -1 / 0 | 5 | ✓ Full exchange observed |
| 10-10 19:23 | 160m | +8 / -2 | SP6JEV | -4 / 0 | 4 | ✓ Full exchange observed |
| 10-10 15:45 | 80m | -7 / -1 | RK1N | +11 / - | 5 | ✓ Full exchange observed |
| 10-10 15:45 | 80m | -11 / +1 | UA9FLI | -2 / - | 6 | ✓ Closing observed |
| 10-10 15:39 | 80m | -6 / - | OZ3AEV | -12 / - | 2 | ✓ Closing observed |
| 10-10 15:20 | 60m | - / - | DL1JEL | +7 / - | 5 | Partial capture |
| 10-09 20:05 | 160m | +6 / -21 | YO8CKT | -2 / - | 7 | ✓ Full exchange observed |
| 10-09 20:04 | 160m | +13 / 0 | OM3SX | +7 / - | 8 | ✓ Full exchange observed |
| 10-09 20:03 | 160m | +14 / +5 | SQ3RX | +2 / - | 7 | ✓ Full exchange observed |
| 10-09 20:03 | 160m | +4 / +7 | SQ9PBV | +12 / 0 | 5 | ✓ Full exchange observed |
| 10-09 20:02 | 160m | +10 / - | LB1LI | - / -24 | 2 | ✓ Closing fragment |
| 10-09 20:01 | 160m | +8 / - | DG4BRT | - / -10 | 2 | ✓ Closing fragment |
| 10-09 19:59 | 160m | +14 / - | RU4CK | - / +8 | 2 | ✓ Closing fragment |
| 10-09 19:57 | 160m | +10 / - | VK5PW | - / -11 | 2 | ✓ Closing fragment |
| 10-09 19:56 | 160m | +2 / -7 | HA5AIL | -3 / -9 | 5 | ✓ Full exchange observed |
| 10-09 19:54 | 160m | +14 / - | UB9MEU | - / 0 | 2 | ✓ Closing fragment |
| 10-09 19:54 | 160m | +10 / -4 | OE6JCG | -7 / +2 | 6 | ✓ Full exchange observed |
| 10-09 19:53 | 160m | +15 / +3 | R5BS | -12 / - | 5 | ✓ Full exchange observed |
| 10-09 19:50 | 160m | +11 / - | R3ZG | -24 / - | 2 | ✓ Closing observed |
| 10-09 19:49 | 160m | +9 / -15 | RU3VT | -12 / -3 | 4 | ✓ Full exchange observed |
| 10-09 19:48 | 160m | +8 / -22 | SV3GKU | 0 / -1 | 5 | ✓ Full exchange observed |
| 10-09 19:47 | 160m | +12 / +7 | R3ZP | -10 / - | 4 | ✓ Full exchange observed |
| 10-09 19:44 | 160m | +12 / - | RN1NEB | -18 / +1 | 3 | ✓ Closing observed |
| 10-09 19:44 | 160m | +12 / - | RX6DA | -24 / -17 | 3 | ✓ Closing observed |
| 10-09 19:43 | 160m | +8 / -17 | UA6BRD | -24 / -3 | 5 | ✓ Full exchange observed |
| 10-09 19:42 | 160m | +6 / -18 | IW2OHP | -8 / -7 | 4 | Partial capture |
| 10-09 19:41 | 160m | +10 / - | LA8ZIA | - / -1 | 2 | ✓ Closing fragment |
| 10-09 19:40 | 160m | +10 / - | EI4JFB | - / -23 | 2 | ✓ Closing fragment |
| 10-09 17:08 | 40m | +7 / - | R3LAF | - / - | 2 | ✓ Closing fragment |
| 10-09 17:06 | 40m | +8 / 0 | R3KLE | -5 / +2 | 4 | ✓ Full exchange observed |
| 10-09 17:05 | 40m | +12 / - | SP4HXV | - / +10 | 2 | ✓ Closing fragment |
| 10-09 17:04 | 40m | +8 / - | SP5PW | - / -2 | 2 | ✓ Closing fragment |
| 10-09 17:03 | 40m | +9 / +8 | R6YG | -18 / - | 3 | ✓ Closing observed |
| 10-09 16:55 | 40m | - / +1 | DL/AD2LX | -12 / - | 4 | Partial capture |
| 10-09 16:55 | 40m | - / - | DL6ENT | +7 / - | 4 | Partial capture |
| 10-09 16:45 | 80m | +6 / +3 | YL2QV | +7 / - | 5 | ✓ Full exchange observed |
| 10-09 16:43 | 80m | +14 / +2 | HB9EOT/P | -9 / -14 | 3 | Partial capture |
| 10-09 16:40 | 80m | +2 / 0 | RZ6HBK | -15 / -9 | 4 | ✓ Full exchange observed |
| 10-09 16:40 | 80m | +10 / - | DA6NEL | +3 / +6 | 7 | ✓ Full exchange observed |
| 10-09 16:39 | 80m | - / - | DG4BZ | -12 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 193815 -10 892 SD5X G0WSJ 73 193830 +2 1302 RA4Y SD5X -04 193845 -6 1304 SD5X RA4Y R-18 193900 +8 1302 RA4Y SD5X RR73 193915 -18 1120 SD5X SV5ADM KM46 193915 -5 1304 SD5X RA4Y R-18 193930 +7 1302 RA4Y SD5X RR73 193945 -8 1304 SD5X RA4Y R-18 194000 -1 1303 RA4Y SD5X RR73 194030 +1 1302 SV5ADM SD5X -27 (x2) 194400 +5 1302 RA4Y SD5X RR73 194430 +2 1302 CQ SD5X JO88 194500 +3 1302 DF6DOM SD5X -11 (x2)
UTC dB Audio Message 154330 -12 779 EX8BT SD5X 73 154500 -5 779 CQ SD5X JO88 154515 -1 685 SD5X UA9FLI LO89 (x2) 154545 +12 1049 SD5X RK1N -01 154600 -11 779 UA9FLI SD5X RR73 154615 -3 684 SD5X UA9FLI R+01 154630 -11 779 UA9FLI SD5X RR73 154645 +0 684 SD5X UA9FLI 73 154645 +11 1049 SD5X RK1N +01 154700 -3 779 RK1N SD5X R+33 154715 +11 1049 SD5X RK1N RR73 154730 -11 779 RK1N SD5X 73 155115 -12 779 R0ADK SD5X +05 155300 -14 778 RW3YS SD5X -14
UTC dB Audio Message 152045 +4 1085 SD5X DL1JEL JO60 (x5)
UTC dB Audio Message 165645 -15 2177 SD5X DL/AD2LX R+01 165730 +3 591 R7MP SD5X +07 170330 -24 2580 SD5X R6YG R+08 170345 +9 591 R6YG SD5X RR73 170400 -13 2580 SD5X R6YG 73 170415 +3 591 SP5PW SD5X -02 (x2) 170515 +14 591 SP4HXV SD5X R+10 (x2) 170615 +9 591 R3KLE SD5X +02 170730 -5 931 SD5X R3KLE R+00 170815 +5 592 R3LAF SD5X +15 (x2) 170915 +10 591 R3KLE SD5X +04 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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