RJ4H — 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 RJ4H, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-10-16.
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 11 FT8 messages attributed to RJ4H as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -17 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 2.
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 RJ4H 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 RJ4H
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
- LO43 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,903 km (approx.)
- Last such locator decoded
- 2026-10-15 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 UTC | Band | RJ4H S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-29 04:57 | 40m | - / 0 | RA4HG | -19 / - | 2 | Partial capture |
| 10-28 14:28 | 40m | - / +2 | UA3WDO | -17 / - | 2 | ✓ Closing fragment |
| 10-28 14:10 | 40m | - / -8 | R2ZCA | -15 / - | 2 | ✓ Closing fragment |
| 10-28 13:00 | 40m | - / 0 | RA6MQ/P | -15 / - | 3 | ✓ Closing fragment |
| 10-27 14:47 | 40m | - / - | SV1ENG | -14 / - | 2 | Partial capture |
| 10-27 14:33 | 40m | - / -5 | R7NO | 0 / - | 2 | ✓ Closing fragment |
| 10-27 14:30 | 40m | - / -4 | RD6OX | 0 / - | 2 | ✓ Closing fragment |
| 10-27 13:52 | 40m | - / - | UA6HJT | 0 / - | 2 | Partial capture |
| 10-23 14:53 | 40m | - / -4 | R1QAM | -17 / - | 2 | ✓ Closing fragment |
| 10-23 14:51 | 40m | - / -7 | RA0SMS | -12 / - | 2 | ✓ Closing fragment |
| 10-20 15:05 | 40m | - / -16 | RN3YN | +1 / - | 3 | ✓ Closing fragment |
| 10-20 14:00 | 40m | - / -1 | RA1TL | 0 / - | 2 | Partial capture |
| 10-20 13:57 | 40m | - / -7 | RA3LBK | -8 / - | 2 | ✓ Closing fragment |
| 10-20 13:43 | 40m | - / -9 | RN6DR | -10 / - | 2 | ✓ Closing fragment |
| 10-16 16:17 | 40m | - / - | DJ0MAB | -3 / - | 3 | Partial capture |
| 10-16 16:09 | 40m | - / -12 | RC6OZ | +1 / - | 3 | ✓ Closing fragment |
| 10-16 16:08 | 40m | -20 / 0 | R6YG | -1 / - | 3 | ✓ Closing observed |
| 10-16 15:55 | 40m | - / -4 | RX7O | -8 / - | 2 | ✓ Closing fragment |
| 10-16 15:41 | 40m | - / -1 | RM1B | 0 / - | 2 | ✓ Closing fragment |
| 10-16 15:30 | 40m | -17 / +8 | RU3FA | -24 / -12 | 2 | Partial capture |
| 10-15 15:21 | 40m | - / -8 | R6OAG | -4 / - | 2 | ✓ Closing fragment |
| 10-15 14:49 | 40m | - / - | DJ0MAB | -10 / - | 3 | Partial capture |
| 10-15 14:26 | 40m | - / - | DJ0MAB | -3 / - | 3 | Partial capture |
| 10-15 14:24 | 40m | - / -10 | R2YW | -10 / - | 4 | ✓ Closing fragment |
| 10-15 13:41 | 40m | - / -16 | RG6OR | -18 / - | 4 | ✓ Closing fragment |
| 10-15 13:39 | 40m | - / +1 | R3DAJ | -9 / - | 3 | ✓ Closing fragment |
| 10-14 14:36 | 40m | - / -14 | HA7TM | +8 / - | 3 | ✓ Closing fragment |
| 10-14 14:33 | 40m | - / -13 | RU5X | -3 / - | 5 | ✓ Closing fragment |
| 10-14 14:27 | 40m | - / +5 | RZ9A | -20 / - | 2 | ✓ Closing fragment |
| 10-14 14:23 | 40m | - / -3 | R8CKV | -2 / - | 2 | ✓ Closing fragment |
| 10-08 15:08 | 40m | - / -6 | RA3X | -3 / - | 3 | ✓ Closing fragment |
| 10-08 14:33 | 40m | - / -5 | R80SAA | +4 / - | 2 | ✓ Closing fragment |
| 10-08 14:28 | 40m | - / - | R2ZC | -18 / - | 3 | ✓ Closing fragment |
| 10-08 14:10 | 40m | - / -3 | R3DID | -8 / - | 2 | ✓ Closing fragment |
| 10-08 14:05 | 40m | - / -7 | RK1K | -11 / - | 2 | ✓ Closing fragment |
| 10-06 13:38 | 40m | - / -8 | UA7T | -18 / - | 3 | ✓ Closing fragment |
| 09-23 17:14 | 40m | - / -7 | UA3GJM | -2 / - | 2 | Partial capture |
| 09-23 17:13 | 40m | - / -16 | R3IAD | -20 / - | 2 | ✓ Closing fragment |
| 09-23 16:59 | 40m | - / -11 | R6JY | 0 / - | 2 | ✓ Closing fragment |
| 09-23 12:59 | 40m | - / -15 | R6KY | -8 / - | 2 | ✓ Closing fragment |
| 09-22 14:14 | 40m | - / +4 | RA3PN | +4 / - | 2 | ✓ Closing fragment |
| 09-22 14:06 | 40m | - / -3 | RZ6LY | +2 / - | 2 | ✓ Closing fragment |
| 09-20 14:42 | 40m | - / -6 | RG5A | -3 / - | 3 | ✓ Closing fragment |
| 09-20 13:37 | 40m | - / +5 | R2YW | +2 / - | 2 | ✓ Closing fragment |
| 09-20 13:22 | 40m | - / -16 | R2EA/P | -8 / - | 2 | ✓ Closing fragment |
| 09-20 13:17 | 40m | - / - | UB1CCL | -18 / - | 2 | ✓ Closing fragment |
| 09-18 13:48 | 40m | - / +8 | UA3WDO | -8 / - | 2 | ✓ Closing fragment |
| 09-17 14:18 | 40m | - / -5 | R6AC | -17 / - | 2 | ✓ Closing fragment |
| 09-02 16:31 | 40m | - / +3 | R6ML | -2 / - | 2 | ✓ Closing fragment |
| 09-02 16:23 | 40m | - / - | SP9EVL | -3 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 144630 -9 1427 RJ4H R3KJF -17 144730 -13 1156 RJ4H SV1ENG KM18 (x2) 145045 -15 2443 RJ4H R4UAS RRR 130045 -16 1904 RJ4H RA6MQ/P +00 (x3) 135345 -13 594 RJ4H R6AO RR73 141045 -14 1662 RJ4H R2ZCA -08 (x2) 142845 -16 1991 RJ4H UA3WDO +02 (x2) 045530 -4 2118 RJ4H R3WF -05 045700 -21 1924 RJ4H RA4HG +00 (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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