DH1DA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN48

Receiver-side FT8 activity involving DH1DA, decoded by SO8OO in southeastern Poland. 53 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-20 and 2026-09-16.

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 53 FT8 messages attributed to DH1DA as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (68%), followed by 40 m (25%) and 20 m (8%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

60m · 36 40m · 13 20m · 4

First attributed message: 2026-07-20
Last attributed message: 2026-09-16 18:37 UTC

Observed FT8 message patterns

Attributed sample: 53 messages
Active dates: 5 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -19 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 7.

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 DH1DA in decoded directed-looking exchanges:

A61CK · United Arab Emirates CN2DX · Morocco PA0LDE · Netherlands TN8GD · Republic of the Congo IQ4JO · Italy IZ2WYA · Italy ON5ACO · Belgium PD2MAC/P · Netherlands UR5XEJ · Ukraine YT2FA · Serbia DL5DQZ · Fed. Rep. of Germany E79D · Bosnia-Herzegovina

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 DH1DA

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 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-09-16 18:36 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	DH1DA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 18:36	60m	-19 / -12	ER3UA	+5 / -1	5	✓ Full exchange observed
09-16 18:30	60m	-15 / -	C31CT	- / -	7	Partial capture
09-16 18:28	60m	-17 / -14	E79D	+8 / -	4	✓ Closing observed
09-15 19:21	60m	-17 / -2	OM5JG	+2 / -	5	✓ Full exchange observed
09-15 19:19	60m	-17 / -1	F5MYK	-16 / +1	5	✓ Full exchange observed
09-15 19:15	60m	-15 / -1	DL5DQZ	-1 / -	8	✓ Full exchange observed
09-15 19:14	60m	-13 / -	F5OZC	-4 / -	4	✓ Closing observed
09-15 19:14	60m	- / +7	IK4CBO	-8 / -	6	✓ Closing fragment
09-15 19:11	60m	-19 / -	GE3TXA	- / -1	3	✓ Closing fragment
09-15 19:09	60m	-16 / -6	G3UHU	-10 / +5	5	✓ Full exchange observed
09-15 19:06	60m	-16 / -10	SQ8AA	-10 / +9	12	✓ Full exchange observed
09-15 18:21	40m	-4 / -	UR5XEJ	- / -13	3	✓ Closing fragment
09-15 18:19	40m	-8 / +2	ON5ACO	-7 / +2	4	✓ Full exchange observed
09-15 18:17	40m	-10 / -	PD2MAC/P	-11 / -10	3	✓ Closing observed
09-15 18:17	40m	- / -4	IQ4JO	-15 / -	2	✓ Closing fragment
09-15 18:16	40m	- / -	UA4FKT	0 / -	2	Partial capture
07-21 18:03	20m	-2 / -16	A61CK	-14 / -	4	✓ Closing observed
07-21 16:48	40m	-17 / -	IZ2WYA	- / -4	2	✓ Closing fragment
07-13 18:55	20m	- / -8	TN8GD	-16 / -	2	✓ Closing fragment
07-13 18:48	20m	- / -6	CN2DX	-2 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
182915 +11 1182  DH1DA E79D RR73
182930 -15 1112  E79D DH1DA 73
183000 -15 1112  C31CT DH1DA JN48 (x4)
183245 -15  682  DH1DA PA7FB R-15
183330 -15 1112  C31CT DH1DA JN48 (x3)
183645 -19 1646  ER3UA DH1DA JN48
183700  +4 2689  DH1DA ER3UA -12
183715 -19 1645  ER3UA DH1DA R-01
183730  +6 2689  DH1DA ER3UA RR73
183745 -20 1645  ER3UA DH1DA 73

40m

UTC    dB Audio  Message
181745 -16 2239  DH1DA IQ4JO 73
181745  -7 1788  DH1DA DL6CMF JO52
181800 -10 1788  PD2MAC/P DH1DA -10
181845 -11  422  DH1DA PD2MAC/P 73
181930  -7 1788  CQ DH1DA JN48
181945  -6  782  DH1DA ON5ACO +02
181945 -13 2062  DH1DA DL1YFS JO41
182000  -9 1787  ON5ACO DH1DA R+02
182015  -8  781  DH1DA ON5ACO RR73
182030  -7 1788  ON5ACO DH1DA 73
182100  -7 1787  UR5XEJ DH1DA -13 (x3)
203215 -17 1318  YT2FA DH1DA 73
203345 -24 1318  II6IGTO DH1DA R+01

20m

UTC    dB Audio  Message
184800  -4 1778  DH1DA CN2DX -06 (x2)
185145 -14 1208  DH1DA RC5F R+01
185530 -17 1412  DH1DA TN8GD -08 (x2)
190445 -16  728  DH1DA PA0LDE 73
180330  -3  741  A61CK DH1DA JN48 (x2)
180415 -14  869  DH1DA A61CK -16 (x2)
183930 -14  960  TU5MM DH1DA JN48
184845 -17 1046  TJ1GD/P DH1DA R-11

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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