HZ1SK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Saudi Arabia Most frequent locator attributed to this token: KL91

Receiver-side FT8 activity involving HZ1SK, decoded by SO8OO in southeastern Poland. 148 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-21.

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 148 FT8 messages attributed to HZ1SK as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (78%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

148

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

20m · 148

First attributed message: 2026-06-08
Last attributed message: 2026-08-21 22:02 UTC

Observed FT8 message patterns

Attributed sample: 148 messages
Active dates: 4 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -18 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 51, moderate (-15 to -9 dB) 85, strong (≥ -8 dB) 12.

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 HZ1SK in decoded directed-looking exchanges:

BA3QIQ · China BA6KC · China CT1BFP · Portugal DL9DE · Fed. Rep. of Germany EA3AAY · Spain EA3FYO · Spain EA4DM · Spain F1ONW · France G6MTI · England IK4LZH · Italy IT9WMD · Sicily IU0NAD · Italy

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 HZ1SK

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: KL91 · 49 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 3,504 km (approx.)
Last such locator decoded: 2026-08-21 21:58 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	HZ1SK S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-21 22:01	20m	-12 / -	N2DPF	- / -16	2	✓ Closing fragment
08-21 22:00	20m	-17 / -	N8CMB	-22 / -16	6	Partial capture
08-21 21:59	20m	-16 / -	BA3QIQ	- / -19	2	✓ Closing fragment
08-21 21:54	20m	-16 / -	OK2CNI	- / -2	3	✓ Closing fragment
08-21 21:53	20m	-13 / -	JM4WUZ	- / -19	4	✓ Closing fragment
08-21 21:52	20m	-13 / -	JH1LPZ	- / -13	2	✓ Closing fragment
08-21 21:51	20m	- / -15	<...>	-7 / -	2	Partial capture
08-21 21:39	20m	-13 / -	A71UN	- / -19	2	Partial capture
08-21 21:38	20m	-12 / -	WD4GBW	- / -18	2	✓ Closing fragment
08-21 21:31	20m	-18 / -	CT1BFP	-9 / -9	8	✓ Closing observed
07-23 18:59	20m	-17 / -	SQ2BXI	- / -15	2	✓ Closing fragment
07-23 18:54	20m	-9 / -6	TN8GD	-10 / -15	7	✓ Full exchange observed
07-23 18:52	20m	- / -2	M6INJ	-17 / -	3	✓ Closing fragment
07-23 18:46	20m	-12 / -6	TN8GD	-8 / -12	12	Partial capture
07-23 18:45	20m	-14 / -	N4SJ	- / -16	2	Partial capture
07-23 18:09	20m	-18 / -	OK5AG	- / -10	2	✓ Closing fragment
07-23 18:07	20m	-18 / -	OE3UKW	- / -15	2	✓ Closing fragment
07-23 18:05	20m	-16 / -	T77RN	- / -16	2	Partial capture
07-09 15:37	20m	-18 / -	UA6HBJ	+3 / -7	6	Partial capture
07-09 15:21	20m	-18 / +7	IT9WMD	-16 / -	5	✓ Closing observed
07-09 15:17	20m	-16 / -	G6MTI	- / -12	3	✓ Closing fragment
07-09 15:14	20m	-16 / -	DF4TC	- / -16	2	Partial capture
07-09 15:13	20m	-14 / -	BA6KC	- / -15	2	✓ Closing fragment
07-09 15:08	20m	-14 / -	F4NGR	-12 / -12	5	Partial capture
07-09 15:06	20m	- / -	F5LPL	-23 / -	4	Partial capture
07-09 15:05	20m	-15 / -	DL1R	- / -11	3	Partial capture
07-09 15:03	20m	- / -	IT9WMD	-8 / -	2	Partial capture
07-09 15:02	20m	- / -	F4NGR	-9 / -	4	Partial capture
07-09 14:58	20m	-22 / -	RA3ZDU	-15 / -13	2	Partial capture
07-09 14:58	20m	- / -	RZ4FWA	-6 / -	2	Partial capture
07-09 14:57	20m	-16 / -15	EA3AAY	-19 / -14	4	✓ Full exchange observed
07-09 14:57	20m	-21 / -	EA3FYO	-8 / -	5	✓ Closing observed
07-09 14:56	20m	-16 / -	TA3XEE	- / -16	2	✓ Closing fragment
07-09 14:56	20m	- / -22	IZ8EYN	-7 / -	5	Partial capture
07-09 14:53	20m	-14 / -	<...>	- / -4	4	Partial capture
06-30 12:11	10m	- / -	DO9PV	-7 / -	8	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
215530 -19 1940  OK2CNI HZ1SK RR73
215600 -12 1940  JM4WUZ HZ1SK R-19 (x2)
215800 -15 1940  CQ HZ1SK KL91                         a1 (x2)
215900 -15 1940  BA3QIQ HZ1SK -19 (x2)
220000 -19 1940  N8CMB HZ1SK -16 (x2)
220045 -23 1940  HZ1SK N8CMB EM79
220130 -13 1940  N2DPF HZ1SK -16 (x2)
220245 -20 1940  HZ1SK N8CMB EM79 (x3)

40m

UTC    dB Audio  Message
215200 -19 2196  HZ1SK A71UN R+08

10m

UTC    dB Audio  Message
121100  -4 2406  HZ1SK F6ITD JN03
121100  -4 2235  HZ1SK DO9PV JO30 (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.

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