DK4RS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN49

Receiver-side FT8 activity involving DK4RS, decoded by SO8OO in southeastern Poland. 130 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-04.

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 130 FT8 messages attributed to DK4RS as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (57%), followed by 80 m (36%) and 10 m (4%). Most decodes (88%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

130
Messages attributed
9
UTC dates decoded
23
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 47 40m · 74 20m · 4 10m · 5
First attributed message: 2026-06-09
Last attributed message: 2026-07-04 00:37 UTC

Observed FT8 message patterns

Attributed sample
130 messages
Active dates
9 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-16 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 17, moderate (-15 to -9 dB) 53, strong (≥ -8 dB) 60.

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 DK4RS in decoded directed-looking exchanges:

Most frequent locator attributed to DK4RS

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
JN49 · 74 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
920 km (approx.)
Last such locator decoded
2026-07-04 00:37 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 UTCBandDK4RS S/NCounterpartCounterpart S/NMsgsCapture
07-04 00:33 80m -9 / - IR0WWA - / - 8 Partial capture
07-04 00:29 80m -5 / -4 SK3WWA -12 / +5 7 ✓ Full exchange observed
07-04 00:27 80m -6 / - IR0WWA - / - 4 Partial capture
07-04 00:25 80m -4 / - GB2WWA - / - 2 Partial capture
07-04 00:24 80m -12 / -14 SN4WWA +6 / +3 4 ✓ Full exchange observed
07-04 00:22 80m -3 / -7 9A3AUH +2 / - 4 ✓ Closing observed
07-04 00:20 80m -7 / -5 CR2WWA -14 / -8 4 ✓ Full exchange observed
07-04 00:14 80m -2 / +1 3Z6I +12 / +9 3 Partial capture
07-04 00:09 80m +3 / - DA0WWA -5 / - 2 ✓ Closing observed
07-04 00:02 80m -1 / - IR0WWA - / - 2 Partial capture
07-04 00:00 80m -12 / 0 TM8WWA 0 / -4 3 ✓ Full exchange observed
07-03 22:47 40m -14 / +7 TM2WWA -10 / 0 5 ✓ Full exchange observed
07-03 22:45 40m -14 / -5 DA0WWA +2 / -2 4 ✓ Full exchange observed
07-03 22:43 40m -12 / -9 R2EN -10 / -8 3 ✓ Full exchange observed
07-03 22:40 40m -13 / -17 II1WWA -12 / -3 6 ✓ Full exchange observed
07-03 22:38 40m -10 / - SN0WWA - / - 2 ✓ Closing fragment
07-03 15:01 20m - / 0 GB2WWA +12 / - 2 ✓ Closing fragment
06-29 22:54 40m -10 / - DA0WWA - / - 2 Partial capture
06-29 22:52 40m -12 / -8 YO6LM -8 / -10 4 ✓ Full exchange observed
06-29 22:51 40m -11 / - GB2WWA - / -3 3 ✓ Closing fragment
06-29 22:45 40m -13 / -3 SP9MOA -8 / -8 9 ✓ Full exchange observed
06-29 22:44 40m -14 / - R2EA/P -9 / -7 3 ✓ Closing observed
06-29 22:43 40m -14 / +6 SN0WWA -18 / -3 4 ✓ Full exchange observed
06-29 21:16 40m -14 / -5 F5RRS -18 / -1 5 ✓ Full exchange observed
06-29 21:15 40m -14 / - DL5DQZ -6 / -1 4 ✓ Closing observed
06-29 21:13 40m -14 / -5 SN1WWA -14 / 0 3 ✓ Full exchange observed
06-29 21:11 40m -15 / - TM8WWA - / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
002915  +0 2408  SK3WWA DK4RS JN49 (x3)
003030 -13 1270  DK4RS SK3WWA -04
003045  -5 2409  SK3WWA DK4RS R+05
003100 -12 1270  DK4RS SK3WWA RR73
003115 -10 2408  SK3WWA DK4RS 73
003315 -18 2409  IR0WWA DK4RS JN49 (x8)
40m 
UTC    dB Audio  Message
224200 -12 1294  DK4RS II1WWA -17
224215 -15 2445  II1WWA DK4RS R-03 (x2)
224300 -14 2476  DK4RS R2EN -09
224315 -12 2444  R2EN DK4RS R-08
224330  -5 2476  DK4RS R2EN RR73
224530  +3 2536  DK4RS DA0WWA -05
224545 -13 2444  DA0WWA DK4RS R-02
224600  +1 2536  DK4RS DA0WWA RR73
224615 -16 2444  DA0WWA DK4RS 73
224715 -15 2444  TM2WWA DK4RS JN49
224730 -11 1223  DK4RS TM2WWA +07
224745 -17 2444  TM2WWA DK4RS R+00
224800  -9 1223  DK4RS TM2WWA RR73
224815 -11 2444  TM2WWA DK4RS 73
20m 
UTC    dB Audio  Message
145930 -12 1983  DK4RS TM8WWA -17
150100 +10 2508  DK4RS GB2WWA +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.

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