DF1SD — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JN48

Receiver-side FT8 activity involving DF1SD, decoded by SO8OO in southeastern Poland. 1,038 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-11-03.

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 1,038 FT8 messages attributed to DF1SD 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 (60%), followed by 10 m (23%) and 20 m (12%). Most decodes (51%) 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 (83%); the estimated median was -0.2 dB.

Overview

1,038
Messages attributed
50
UTC dates decoded
137
Active 15-min windows
-0.2 dB
Estimated median S/N

Bands

80m · 49 40m · 624 20m · 122 10m · 243
First attributed message: 2026-06-08
Last attributed message: 2026-11-03 21:29 UTC

Observed FT8 message patterns

Attributed sample
1,038 messages
Active dates
50 UTC dates
Estimated median S/N
-0.2 dB
Estimated 10th-90th percentile
-13 to +10.1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 56, moderate (-15 to -9 dB) 117, strong (≥ -8 dB) 865.

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 DF1SD 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 DF1SD

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
JN48 · 628 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
941 km (approx.)
Last such locator decoded
2026-11-03 21:29 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 UTCBandDF1SD S/NCounterpartCounterpart S/NMsgsCapture
11-03 21:28 80m -5 / - AP2AM - / - 3 Partial capture
11-03 21:26 80m -10 / - R7OQ - / - 3 Partial capture
11-03 16:49 40m -4 / -5 RA6FTH -15 / -17 4 ✓ Full exchange observed
11-03 16:42 80m -8 / - RA3DX - / - 2 Partial capture
11-03 16:39 80m -13 / - UA9XL/P - / - 5 Partial capture
10-30 09:40 10m - / -1 R4WAM -11 / - 2 ✓ Closing fragment
10-30 07:36 10m - / -10 RA4PIS -8 / - 2 ✓ Closing fragment
10-27 08:37 10m - / - RX9CN -13 / - 4 Partial capture
10-23 18:03 80m +8 / - RG4C - / - 2 Partial capture
10-23 16:40 40m +9 / - Z68QQ - / - 5 Partial capture
10-23 16:39 40m +10 / - RL6ZK - / - 2 Partial capture
10-23 16:37 40m +9 / - UA6LIK - / - 3 Partial capture
10-23 16:36 40m +6 / - Z68QQ - / - 3 Partial capture
10-23 16:34 40m +8 / - RV4LD - / -2 3 ✓ Closing fragment
10-23 16:31 40m +4 / - RL6ZK -6 / -11 5 ✓ Closing observed
10-23 16:30 40m +6 / -16 RV4LD -1 / +3 2 Partial capture
10-23 16:28 40m +1 / - RL6ZK - / - 2 Partial capture
10-23 16:23 40m +5 / -15 RY6LAL -5 / -11 10 Partial capture
10-23 16:22 40m +11 / - EU6UE - / - 2 Partial capture
10-23 16:21 40m +15 / -6 R9LY -4 / +1 5 ✓ Full exchange observed
10-23 16:17 40m +5 / - R0ADK - / -15 8 ✓ Closing fragment
10-20 05:53 40m +2 / - R1QAV - / - 8 Partial capture
10-20 05:51 40m -3 / -13 RA5AD -12 / -9 5 ✓ Full exchange observed
10-20 05:47 40m -4 / - KS1WK - / -17 4 ✓ Closing fragment
10-20 05:46 40m -2 / - NE2E - / - 2 Partial capture
10-20 05:41 40m -1 / - R2EA/M - / +4 5 Partial capture
10-20 05:37 40m -2 / - N0YO - / -16 7 ✓ Closing fragment
10-20 05:36 40m 0 / - R1QAV - / - 2 Partial capture
10-13 20:33 40m +14 / - JH5HDA - / -16 2 ✓ Closing fragment
10-13 20:32 40m +10 / - SQ1EG - / -24 2 ✓ Closing fragment
10-13 20:30 40m +10 / - JH0EHQ - / -19 5 ✓ Closing fragment
10-13 20:27 40m +10 / -8 RA9SVO -23 / -16 6 ✓ Full exchange observed
10-13 20:25 40m +10 / - BG0FQU - / -17 5 ✓ Closing fragment
10-13 20:23 40m +8 / - JA1BBC - / -21 3 ✓ Closing fragment
10-13 20:22 40m +13 / - JR3NZC - / -11 2 ✓ Closing fragment
10-13 20:20 40m +10 / - JH2VVH - / -7 2 ✓ Closing fragment
10-13 20:20 40m +4 / - M8MFU -18 / +4 3 ✓ Closing observed
10-13 20:18 40m +10 / -11 R7ZY +8 / -6 7 ✓ Full exchange observed
10-13 16:39 40m -1 / -4 RA6OD 0 / -5 7 Partial capture
10-13 16:38 40m -1 / -6 RC3D -3 / +4 7 ✓ Full exchange observed
10-13 16:37 40m -4 / - BG0FQU - / - 2 Partial capture
10-13 16:36 40m -2 / - DA0M - / - 2 Partial capture
10-13 16:34 40m -3 / - F5OYA/P - / - 2 Partial capture
10-13 16:33 40m +8 / - RQ3D - / - 2 Partial capture
10-13 16:26 40m +5 / - HA76MAV - / - 3 Partial capture
10-13 16:20 40m +4 / - R5BM/M - / - 6 Partial capture
10-13 16:14 40m +3 / - HA76MAV - / - 10 Partial capture
10-13 16:05 40m -3 / - RA0QK/8 - / -20 2 Partial capture
10-12 06:56 40m -4 / - SP4BB - / - 2 Partial capture
10-12 06:53 40m -4 / - 9H6C - / -20 5 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
180330  +8 2679  RG4C DF1SD JN48
163930 -11 2043  UA9XL/P DF1SD JN48 (x5)
164245 -10 2042  RA3DX DF1SD JN48 (x2)
170915  -9 2282  RA6ZS DF1SD JN48
212630 -13 2051  R7OQ DF1SD JN48 (x3)
212800  -6 1163  AP2AM DF1SD JN48 (x3)
40m 
UTC    dB Audio  Message
163715  +7  240  Z68QQ DF1SD JN48
163745  +7  240  UA6LIK DF1SD JN48 (x3)
163915 +11  240  RL6ZK DF1SD JN48 (x2)
164015  +7  240  Z68QQ DF1SD JN48 (x5)
164945  -4 2158  RA6FTH DF1SD JN48
165000 -15 2417  DF1SD RA6FTH -05
165015  -5 2158  RA6FTH DF1SD R-17 (x2)
10m 
UTC    dB Audio  Message
100400 -21 2179  DF1SD SV4AQJ RR73
100415  -2 2174  SV4AQJ DF1SD 73
093630 -13 1621  VK8MA DF1SD JN48
100300  -8 1622  YD6APA DF1SD R-24 (x2)
081915 -18 1840  DF1SD R9TA RR73
083745 -15  988  DF1SD RX9CN LO02 (x4)
073630  -8  752  DF1SD RA4PIS -10 (x2)
094045 -18 2023  DF1SD R4WAM -01 (x2)
121730 -11  687  DF1SD 5Z4RS +04
20m 
UTC    dB Audio  Message
202215 -13 2666  RV9CX/0 DF1SD JN48
202230 -17 2510  DF1SD BA3QIQ OM99
202600 -11 1437  DF1SD MI7RDK IO74 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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