RM3ZK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RM3ZK, decoded by SO8OO in southeastern Poland. 955 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-04.
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 955 FT8 messages attributed to RM3ZK as the transmitting token by decoded message structure across 50 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 20 m (24%) and 80 m (17%). Most decodes (66%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -3.1 dB.
Overview
Bands
Last attributed message: 2026-09-04 00:36 UTC
Observed FT8 message patterns
- Attributed sample
- 955 messages
- Active dates
- 50 UTC dates
- Estimated median S/N
- -3.1 dB
- Estimated 10th-90th percentile
- -16 to +10 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 99, moderate (-15 to -9 dB) 226, strong (≥ -8 dB) 630.
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 RM3ZK 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 RM3ZK
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
- KO80 · 585 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,082 km (approx.)
- Last such locator decoded
- 2026-09-04 00:35 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 | RM3ZK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-04 00:35 | 80m | +2 / - | RI1FJL | - / -18 | 4 | ✓ Closing fragment |
| 08-31 18:07 | 80m | +6 / - | R6ZEJ | -9 / -2 | 5 | ✓ Closing observed |
| 08-31 18:05 | 80m | +4 / - | R1ZH | - / -12 | 3 | ✓ Closing fragment |
| 08-31 18:00 | 80m | -1 / -3 | RN2FA | +6 / -15 | 5 | ✓ Full exchange observed |
| 08-31 17:40 | 40m | +3 / - | RI1FJL | - / -14 | 25 | ✓ Closing fragment |
| 08-29 04:34 | 40m | +12 / - | YS1MS | - / - | 12 | Partial capture |
| 08-29 04:18 | 40m | +12 / - | XE1PM | - / - | 11 | Partial capture |
| 08-29 04:09 | 40m | +8 / - | WB2AA | - / -23 | 12 | ✓ Closing fragment |
| 08-29 04:04 | 40m | +13 / - | EU2AAI | - / - | 3 | Partial capture |
| 08-29 04:01 | 40m | +12 / - | 3G1DX | -14 / -12 | 5 | ✓ Closing observed |
| 08-28 17:12 | 40m | +1 / -1 | R4UAS | -8 / -5 | 6 | ✓ Full exchange observed |
| 08-28 17:09 | 40m | -10 / - | BH1TIX | - / - | 3 | Partial capture |
| 08-28 16:48 | 20m | - / - | F4ACR | -4 / - | 6 | Partial capture |
| 08-28 16:36 | 20m | - / -7 | ON1JP | -5 / - | 4 | Partial capture |
| 08-28 02:14 | 80m | +8 / - | K5OA | - / - | 2 | Partial capture |
| 08-28 02:03 | 80m | +10 / - | RK4CH | -17 / -5 | 5 | ✓ Full exchange observed |
| 08-28 02:02 | 80m | +6 / - | 4Z5IY | - / -18 | 2 | Partial capture |
| 08-28 02:00 | 80m | +14 / - | DK8HC | - / -12 | 2 | Partial capture |
| 08-28 01:48 | 80m | +9 / -3 | MI7XHT | +4 / -12 | 5 | ✓ Full exchange observed |
| 08-28 01:45 | 80m | +6 / -12 | WK1O | -10 / -12 | 6 | ✓ Full exchange observed |
| 08-28 01:44 | 80m | - / - | DK8HC | +7 / - | 5 | Partial capture |
| 08-28 01:44 | 80m | +4 / -19 | PA3KUS | -1 / -16 | 9 | ✓ Full exchange observed |
| 08-28 01:38 | 80m | +10 / - | DO8JB | -2 / -13 | 15 | Partial capture |
| 08-28 01:37 | 80m | 0 / - | EA1IOK | -14 / -16 | 3 | ✓ Closing observed |
| 08-25 23:58 | 80m | - / - | IN3IZQ | -20 / - | 3 | Partial capture |
| 08-25 23:54 | 80m | +13 / - | RD7O | - / -5 | 2 | ✓ Closing fragment |
| 08-25 23:49 | 80m | +8 / - | R3SN | - / -11 | 2 | ✓ Closing fragment |
| 08-25 23:46 | 80m | +7 / -5 | DO1OAS | -17 / -12 | 4 | ✓ Full exchange observed |
| 08-25 23:44 | 80m | +6 / - | C31KC | - / - | 4 | Partial capture |
| 08-25 23:42 | 80m | +8 / - | CU2CE | - / - | 2 | Partial capture |
| 08-25 23:38 | 80m | 0 / - | UN0GY | - / - | 4 | Partial capture |
| 08-25 22:52 | 80m | +4 / +8 | RK6MC | -14 / - | 5 | ✓ Closing observed |
| 08-25 22:50 | 80m | +8 / -4 | UA3OO | +8 / - | 7 | ✓ Closing observed |
| 08-25 22:41 | 80m | +7 / - | LB9ZG | 0 / -9 | 11 | ✓ Full exchange observed |
| 08-25 22:40 | 80m | +7 / - | RZ9I | - / -16 | 2 | ✓ Closing fragment |
| 08-25 22:38 | 80m | -9 / - | UA3IDQ | - / - | 4 | Partial capture |
| 08-25 22:35 | 80m | -4 / - | PA3FR | - / - | 4 | Partial capture |
| 08-24 16:27 | 20m | 0 / -9 | YB7FII | -13 / -16 | 3 | Partial capture |
| 08-24 15:54 | 20m | - / -13 | DC5QV | -20 / - | 2 | ✓ Closing fragment |
| 08-24 05:04 | 40m | - / - | E75FM | 0 / - | 2 | Partial capture |
| 08-24 04:57 | 40m | -5 / - | RC7LX | - / -9 | 2 | ✓ Closing fragment |
| 08-24 04:57 | 40m | - / - | DL9KM | +1 / - | 5 | Partial capture |
| 08-24 04:19 | 40m | +1 / - | UB4FJC | - / -10 | 3 | ✓ Closing fragment |
| 08-24 04:13 | 40m | -4 / - | DL6UCK | - / -17 | 4 | ✓ Closing fragment |
| 08-24 04:13 | 40m | - / - | N4MMR | -18 / - | 4 | Partial capture |
| 08-24 04:07 | 40m | -8 / - | EB1LA | - / -14 | 2 | Partial capture |
| 08-22 18:46 | 20m | +8 / - | BG8NQ | - / -20 | 2 | ✓ Closing fragment |
| 08-22 17:42 | 10m | - / - | RD7KW | -2 / - | 2 | Partial capture |
| 08-21 16:38 | 40m | -5 / - | YD7HAS | - / -10 | 2 | ✓ Closing fragment |
| 08-21 16:25 | 40m | +2 / - | ZL2NU | - / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 180330 -5 598 RM3ZK R6ZEJ KN98 180515 +0 1344 R1ZH RM3ZK KO80 (x2) 180600 -1 1894 RM3ZK R6ML LN17 180615 +4 1344 R1ZH RM3ZK 73 180630 -12 1395 RM3ZK UB6OAK KN88 180745 +10 597 R6ZEJ RM3ZK KO80 (x3) 180930 -9 643 RM3ZK R6ZEJ RR73 180945 +1 644 R6ZEJ RM3ZK 73 003515 +1 1948 RI1FJL RM3ZK KO80 (x4)
UTC dB Audio Message 174645 +0 1226 RI1FJL RM3ZK KO80 (x15)
UTC dB Audio Message 162815 +3 2472 YB7FII RM3ZK R-16 163445 +0 1382 RM3ZK R4HHN R+03 163615 -9 1097 RM3ZK ON1JP -07 (x4) 164445 -23 1584 CQ RM3ZK KO80 164730 -14 1916 RM3ZK OE8RPK JN76 164830 -1 1513 RM3ZK F4ACR IN96 (x5) 165115 -13 2162 RM3ZK UA9C +06 165130 -6 1513 RM3ZK F4ACR IN96
UTC dB Audio Message 193545 -18 1404 R5VCV RM3ZK -07 193615 -11 2056 DN9AD RM3ZK -19 (x2) 193715 -15 1194 PY5QR RM3ZK KO80 193815 -14 1517 LU3DOY RM3ZK R-19 194100 -12 1343 LU9DMG RM3ZK KO80 (x4) 183645 -19 1558 PP5GP RM3ZK KO80 (x2) 103800 -16 1119 SY9CGZ RM3ZK KO80 105045 -24 1832 9H4JX RM3ZK KO80 174215 -6 2495 RM3ZK RD7KW KN75 (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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