R4FS — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO23

Receiver-side FT8 activity involving R4FS, decoded by SO8OO in southeastern Poland. 1,770 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 28 UTC dates in the available aggregate history. Observed between 2026-07-04 and 2026-10-31.

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 1,770 FT8 messages attributed to R4FS as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 20 m (26%) and 80 m (7%). Most decodes (85%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

1,770
Messages attributed
28
UTC dates decoded
134
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 119 40m · 1,187 20m · 464
First attributed message: 2026-07-04
Last attributed message: 2026-10-31 16:55 UTC

Observed FT8 message patterns

Attributed sample
1,770 messages
Active dates
28 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-16 to +6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 193, moderate (-15 to -9 dB) 780, strong (≥ -8 dB) 797.

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 R4FS 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 R4FS

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
LO23 · 1,088 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,639 km (approx.)
Last such locator decoded
2026-10-05 05:47 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 UTCBandR4FS S/NCounterpartCounterpart S/NMsgsCapture
10-31 16:53 40m -11 / - UA6XDA - / -16 2 ✓ Closing fragment
10-31 16:43 40m - / -17 R5AV -10 / - 2 ✓ Closing fragment
10-12 23:34 80m 0 / -4 R3HH -4 / -15 4 ✓ Full exchange observed
10-12 23:30 80m -3 / +10 UA3IDQ +1 / -18 15 ✓ Full exchange observed
10-11 13:06 40m - / +2 EW2GI -13 / - 3 ✓ Closing fragment
10-09 19:18 40m - / -7 IR8PR -13 / - 2 ✓ Closing fragment
10-05 05:51 40m - / - IW0RLC -1 / - 5 Partial capture
10-05 05:49 40m - / +1 UA3WG -13 / - 3 ✓ Closing fragment
10-05 05:44 40m -15 / +3 RD3FY -3 / -10 3 ✓ Full exchange observed
09-21 14:15 40m -13 / +3 R6NN 0 / +4 4 ✓ Full exchange observed
09-21 14:12 40m -10 / +6 RK3DJW -4 / +3 4 ✓ Full exchange observed
09-21 14:10 40m -10 / - UB9WPD - / -12 2 ✓ Closing fragment
09-21 14:09 40m -9 / - UB8LAR - / -5 2 ✓ Closing fragment
09-21 14:08 40m -6 / - RA3TK - / +3 2 ✓ Closing fragment
09-21 14:07 40m - / -15 ON1DGN -16 / - 4 Partial capture
09-21 14:07 40m - / - OE8PIT +3 / - 4 Partial capture
09-21 14:07 40m - / - SP9WAZ -2 / - 2 Partial capture
09-21 14:05 40m -14 / - YB1KXV - / -12 3 ✓ Closing fragment
09-14 14:26 40m -7 / - RK3YWA -7 / - 3 ✓ Closing observed
09-14 14:25 40m -7 / - R9FGJ - / -19 2 Partial capture
09-14 14:21 40m -14 / -4 R70SAB -9 / - 3 ✓ Closing observed
09-13 21:47 40m - / - EX7CQ -4 / - 2 ✓ Closing fragment
09-13 01:55 80m -5 / -19 VP2MAA -18 / -15 12 ✓ Full exchange observed
09-13 01:55 80m - / - ON4MAP -21 / - 5 Partial capture
09-13 01:54 80m - / -18 ON1JP -16 / - 5 Partial capture
09-13 01:53 80m -14 / - R4HLO - / -16 2 ✓ Closing fragment
09-13 01:50 80m -10 / - SM3NXS - / -11 4 ✓ Closing fragment
09-13 01:47 80m -10 / - OH2LV - / -13 4 ✓ Closing fragment
09-13 01:45 80m -10 / +2 R6OAF -1 / - 2 Partial capture
09-13 01:44 80m -5 / - VP2MAA - / - 3 Partial capture
09-13 01:31 80m -4 / - VP2MAA - / - 18 Partial capture
09-13 01:17 80m +1 / - VP2MAA - / -18 13 Partial capture
09-13 01:10 80m -5 / - VP2MAA - / -17 6 Partial capture
09-13 01:02 80m -2 / - R9MJ -23 / -19 4 ✓ Closing observed
09-13 01:02 80m -11 / - VP2MAA - / -17 8 Partial capture
09-13 00:58 80m -16 / -15 DH1KJ +8 / -17 7 ✓ Full exchange observed
09-13 00:55 80m -21 / -3 R4FDD +5 / +5 3 ✓ Full exchange observed
09-13 00:45 40m -23 / -7 CR7BRV +1 / - 4 ✓ Closing observed
09-06 06:19 40m - / 0 RD6OZ -6 / - 2 ✓ Closing fragment
09-05 04:50 40m -11 / +8 DF8RU +9 / - 4 ✓ Closing observed
09-05 04:44 40m -7 / - RW3SB - / -7 2 ✓ Closing fragment
09-05 04:38 40m -10 / - UA9SY - / +6 2 ✓ Closing fragment
09-04 20:59 80m - / - R7FQ -5 / - 2 Partial capture
09-04 20:51 80m -9 / - RG4C - / -7 3 Partial capture
09-04 20:43 80m - / -1 R3DLK 0 / - 2 ✓ Closing fragment
09-04 20:39 80m -24 / -7 RM5F +3 / - 4 ✓ Closing observed
09-04 20:36 40m -2 / - IW2CAK/2 - / -15 3 Partial capture
09-04 20:27 40m - / -17 BG0FQU -18 / - 2 Partial capture
09-04 20:27 40m - / +5 ON1DGN -15 / - 4 Partial capture
09-04 20:27 40m - / - UB3AVN -8 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
055145  -6  800  R4FS DL4DTL -05
055215  -6 2740  R4FS IW0RLC JN63 (x3)
191800 -11 1660  R4FS IR8PR R-07 (x2)
130600 -11 1407  R4FS EW2GI R+02 (x3)
164330 -12 2254  R4FS R5AV -17 (x2)
165230 -10 2445  EY7BP R4FS -08
165330 -10 2445  UA6XDA R4FS -16 (x2)
165530  -7 2446  F5OYA/P R4FS -08
80m 
UTC    dB Audio  Message
233215  -7 1597  UA3IDQ R4FS -21
233230  +7 1597  R4FS UA3IDQ R+10 (x4)
233415  +4 2350  R3HH R4FS -15
233430  +1 1597  R4FS UA3IDQ R+10
233430  -7 2632  R4FS R3HH R-04
233445  -3 2350  R3HH R4FS RR73
233500  +3 1597  R4FS UA3IDQ R+10
233500  -1 2632  R4FS R3HH 73
233545  -1 2350  UA3IDQ R4FS RR73 (x3)
233900  -5 2349  RA3WPF R4FS -15
20m 
UTC    dB Audio  Message
120330  -4 1728  R4FS RV3F 73
120445  -2 1728  CQ R4FS LO23 (x3)
153845  +5 1949  BG7BVP R4FS -17
153900 -11 2637  R4FS BG7BVP R-20
153915  +5 1949  BG7BVP R4FS RR73
153945  +7 1948  CQ R4FS LO23 (x8)

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.

Explore CW reception at SO8OO

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