RO3ZR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RO3ZR, decoded by SO8OO in southeastern Poland. 1,274 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 46 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-20.
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 1,274 FT8 messages attributed to RO3ZR as the transmitting token by decoded message structure across 46 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (45%), followed by 40 m (29%) and 20 m (17%). Most decodes (61%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -6.7 dB.
Overview
Bands
Last attributed message: 2026-09-20 03:49 UTC
Observed FT8 message patterns
- Attributed sample
- 1,274 messages
- Active dates
- 46 UTC dates
- Estimated median S/N
- -6.7 dB
- Estimated 10th-90th percentile
- -18 to +4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 235, moderate (-15 to -9 dB) 307, strong (≥ -8 dB) 732.
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 RO3ZR 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 RO3ZR
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 · 609 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,082 km (approx.)
- Last such locator decoded
- 2026-09-20 03:46 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 | RO3ZR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 03:48 | 80m | -4 / -8 | UA3YGP | +8 / - | 2 | ✓ Closing observed |
| 09-20 03:48 | 80m | -5 / - | RY2A | -14 / +10 | 3 | ✓ Closing observed |
| 09-20 03:46 | 80m | -10 / -3 | RA6OY | -5 / - | 6 | ✓ Full exchange observed |
| 09-20 03:42 | 80m | - / - | MM0ABM | -2 / - | 2 | Partial capture |
| 09-20 03:42 | 80m | -24 / - | EU7A | +15 / +4 | 2 | ✓ Closing observed |
| 09-20 03:34 | 80m | +6 / - | S57TW | +18 / -7 | 6 | ✓ Closing observed |
| 09-20 03:33 | 80m | 0 / - | UA3IDQ | -7 / -7 | 2 | ✓ Closing observed |
| 09-20 03:31 | 80m | +1 / -13 | GM6URC | -10 / -20 | 4 | ✓ Full exchange observed |
| 09-20 03:30 | 80m | +4 / - | DO1MER | -5 / -10 | 3 | ✓ Closing observed |
| 09-20 02:55 | 40m | - / - | UN7LZ | -6 / - | 2 | ✓ Closing fragment |
| 09-19 18:43 | 40m | +4 / -10 | R3DMS | -7 / -16 | 5 | ✓ Full exchange observed |
| 09-19 18:42 | 40m | +2 / -11 | R3ES | +2 / -21 | 8 | ✓ Full exchange observed |
| 09-19 18:40 | 40m | -4 / -12 | S52DD | +12 / -11 | 5 | ✓ Full exchange observed |
| 09-19 18:36 | 80m | +12 / -3 | EU1AFX | -2 / -13 | 4 | ✓ Full exchange observed |
| 09-19 18:34 | 80m | +4 / - | UA4AGU | - / - | 2 | Partial capture |
| 09-19 18:30 | 80m | - / -7 | R3RRC/P | -2 / - | 2 | ✓ Closing fragment |
| 09-19 18:25 | 80m | +7 / -4 | RK9UE | -2 / +1 | 5 | ✓ Full exchange observed |
| 09-19 18:23 | 80m | +2 / - | R3AQ | - / +3 | 3 | ✓ Closing fragment |
| 09-19 18:22 | 80m | +5 / - | R3VA | - / +1 | 3 | ✓ Closing fragment |
| 09-19 18:13 | 80m | 0 / - | RW4LMR | - / 0 | 2 | ✓ Closing fragment |
| 09-19 18:12 | 80m | 0 / - | RW3RN | +2 / - | 3 | ✓ Closing observed |
| 09-19 18:01 | 80m | +7 / - | R9FGF | - / -13 | 3 | ✓ Closing fragment |
| 09-19 17:56 | 80m | +3 / - | RA3SO | - / +5 | 2 | Partial capture |
| 09-19 17:54 | 80m | -2 / +1 | UA3QNA | +10 / - | 3 | ✓ Closing observed |
| 09-19 17:53 | 80m | 0 / -5 | R1TAX | -8 / - | 3 | ✓ Closing observed |
| 09-19 17:51 | 80m | +8 / - | R3ST | - / - | 2 | ✓ Closing fragment |
| 09-19 17:48 | 80m | - / -21 | R3ICU | -4 / - | 3 | ✓ Closing fragment |
| 09-19 17:41 | 80m | -11 / -13 | RU3VT | 0 / - | 4 | ✓ Closing observed |
| 09-19 17:40 | 80m | -5 / -10 | R2AVW | -8 / - | 2 | ✓ Closing observed |
| 09-19 03:43 | 80m | -8 / -12 | SV1DKR | -8 / -11 | 4 | ✓ Full exchange observed |
| 09-19 03:42 | 80m | - / -5 | UR5ZGY | +1 / - | 2 | ✓ Closing fragment |
| 09-19 03:35 | 80m | -13 / -12 | RC1TF | -4 / -6 | 5 | ✓ Full exchange observed |
| 09-19 03:33 | 80m | -9 / -13 | DO3VE | +2 / -15 | 5 | ✓ Full exchange observed |
| 09-13 03:44 | 40m | -9 / - | RV3ID | +4 / +5 | 4 | ✓ Closing observed |
| 09-13 03:43 | 40m | -14 / - | R4FDW | - / -12 | 2 | ✓ Closing fragment |
| 09-13 03:39 | 40m | -12 / -5 | RU7KQ | +2 / -2 | 4 | ✓ Full exchange observed |
| 09-13 03:35 | 40m | -1 / - | HA7TM | - / -24 | 6 | ✓ Closing fragment |
| 09-13 03:34 | 40m | -4 / - | R4ML | -8 / +8 | 2 | Partial capture |
| 09-13 03:33 | 40m | -4 / - | R9FAK | - / -10 | 2 | ✓ Closing fragment |
| 09-13 03:31 | 40m | -3 / -10 | UA6LET | 0 / +6 | 5 | ✓ Full exchange observed |
| 09-13 03:29 | 40m | -6 / - | ES2DR | - / +3 | 3 | ✓ Closing fragment |
| 09-13 03:27 | 40m | -1 / - | RA3DFQ | - / - | 2 | Partial capture |
| 09-13 03:12 | 40m | - / -9 | W6NWS | +6 / - | 2 | ✓ Closing fragment |
| 09-13 03:10 | 40m | - / -3 | R7HL | -5 / - | 2 | ✓ Closing fragment |
| 09-13 03:07 | 40m | - / -15 | EB3JT | -1 / - | 3 | ✓ Closing fragment |
| 09-13 03:02 | 80m | -2 / - | EA6LU | -14 / -11 | 4 | ✓ Closing observed |
| 09-13 03:00 | 80m | -1 / - | R6LKG | - / -11 | 3 | ✓ Closing fragment |
| 09-13 02:58 | 80m | +2 / +1 | R4UA | -20 / +6 | 3 | ✓ Full exchange observed |
| 09-13 02:57 | 80m | +4 / -7 | EA3AKY | -14 / -12 | 4 | ✓ Full exchange observed |
| 09-13 02:54 | 80m | -4 / +8 | OH6FSO | -14 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 034430 -14 1960 ON7GB RO3ZR R-09 034500 -14 1961 UA3YGP RO3ZR R+01 034530 -13 1960 CQ RO3ZR KO80 a1 (x2) 034615 -2 216 RO3ZR RA6OY KN88 034630 -8 1005 RA6OY RO3ZR +15 034645 -3 216 RO3ZR RA6OY KN88 (x2) 034730 -11 559 RA6OY RO3ZR RR73 034745 -10 217 RO3ZR RA6OY 73 034800 -7 558 RY2A RO3ZR R+10 034815 -14 2113 RO3ZR RY2A RR73 034830 -3 558 RY2A RO3ZR 73 034845 +8 559 RO3ZR UA3YGP R-08 034900 -4 558 UA3YGP RO3ZR RR73
UTC dB Audio Message 184415 +5 2891 R3DMS RO3ZR RR73 184430 -4 855 RO3ZR R3DMS 73 184445 +4 2891 R3ES RO3ZR KO80 184515 +3 2892 R2BHQ RO3ZR KO80 184545 +6 2892 R6NA RO3ZR KO80 184600 +4 2796 RO3ZR R3ES -11 184615 -2 2892 R3ES RO3ZR R-17 184630 +5 2796 RO3ZR R3ES RR73 184715 +1 2892 R3RRC/P RO3ZR KO80 185030 +2 2892 JF2JRD RO3ZR KO80 024915 -23 1820 RO3ZR NP3MR -09 025045 -14 1750 RO3ZR UB8QBI RR73 025230 -13 2798 RO3ZR TA4SSK R-11 025500 -6 2490 RO3ZR UN7LZ +14 (x2)
UTC dB Audio Message 165800 -12 2337 RO3ZR BI4JJO -14 071045 -15 1137 RU0AX RO3ZR KO80 071430 -13 1137 RV3TR RO3ZR R-10 071445 -8 1992 RO3ZR RV3TR RR73 (x2) 071715 -16 1137 RU0AX RO3ZR KO80 071800 -18 1136 R8CGI RO3ZR KO80 072245 -4 1374 RO3ZR IZ4VVL JN54 073145 -13 1227 CQ RO3ZR KO80 073830 -12 2577 R9HEB RO3ZR RR73 073900 -7 2577 CQ RO3ZR KO80 (x2) 074000 -11 2577 UA1WBV RO3ZR KO80 041300 +7 828 RO3ZR LZ1EV -06 (x2)
UTC dB Audio Message 083345 -12 1042 RO3ZR ON4VT -16 (x2) 084945 -3 403 RO3ZR RZ3DJ RR73 064630 -24 1842 CQ RO3ZR KO80 (x3) 064745 -17 1733 RO3ZR R7DX KN84 064800 -23 1843 R7DX RO3ZR -11 064815 -14 1733 RO3ZR R7DX R-08 064830 -17 1843 R7DX RO3ZR RR73 064845 -17 1733 RO3ZR R7DX 73 064900 -18 1843 CQ RO3ZR KO80 (x4)
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee