US1ZA — 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: Ukraine Most frequent locator attributed to this token: KN57

Receiver-side FT8 activity involving US1ZA, decoded by SO8OO in southeastern Poland. 426 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-11-01.

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 426 FT8 messages attributed to US1ZA as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (75%), followed by 80 m (22%) and 20 m (2%). Most decodes (64%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (92%); the estimated median was 0 dB.

Overview

426

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 95 40m · 320 20m · 9 10m · 2

First attributed message: 2026-06-13
Last attributed message: 2026-11-01 21:28 UTC

Observed FT8 message patterns

Attributed sample: 426 messages
Active dates: 15 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -8 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 30, strong (≥ -8 dB) 392.

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 US1ZA in decoded directed-looking exchanges:

ON1DGN · Belgium ×3 DL8TV · Fed. Rep. of Germany ×2 OE1AES · Austria ×2 PA0MUS · Netherlands ×2 PD2MAC · Netherlands ×2 YO3GJE · Romania ×2 9A1CCB · Croatia BG2GWN · China DH1NGL · Fed. Rep. of Germany DK1HSI · Fed. Rep. of Germany DL8TT · Fed. Rep. of Germany DM4IG · Fed. Rep. of Germany

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 US1ZA

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: KN57 · 191 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 727 km (approx.)
Last such locator decoded: 2026-11-01 21:24 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	US1ZA S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 21:25	80m	+6 / -17	PE1NPS	-13 / -18	7	✓ Full exchange observed
11-01 21:25	80m	+2 / -7	OH1NBF	-23 / -20	5	✓ Full exchange observed
11-01 21:21	80m	+6 / -1	UT4TA	+10 / -	3	✓ Closing observed
11-01 21:20	80m	+5 / -	DL1HTY	- / -11	2	✓ Closing fragment
11-01 21:17	80m	+3 / -	OM3PR	+9 / +5	6	✓ Closing observed
11-01 21:15	80m	-2 / -	OH2FQV	- / -13	2	Partial capture
11-01 21:13	80m	0 / -	SV1EKI	- / -3	3	✓ Closing fragment
11-01 21:09	80m	-2 / -9	DA6DNA	-9 / -10	7	✓ Full exchange observed
11-01 21:09	80m	-6 / +9	DB2HA	+2 / -1	5	✓ Full exchange observed
11-01 21:06	80m	- / -	R2PT	-3 / -	2	Partial capture
11-01 21:04	80m	- / -	PE1NPS	-7 / -	3	Partial capture
11-01 21:04	80m	+2 / -4	OE5PMM	-8 / -15	6	✓ Full exchange observed
11-01 21:02	80m	0 / -	SV1DKR	- / -	2	Partial capture
11-01 21:01	80m	-4 / -	DC2TL	-6 / -10	4	✓ Closing observed
11-01 20:57	80m	+2 / +3	OK2CNI	-4 / -5	5	✓ Full exchange observed
11-01 15:44	80m	+5 / -	JT1BV	- / -25	2	✓ Closing fragment
11-01 15:42	80m	+6 / -4	OH1IM	-2 / -10	5	✓ Full exchange observed
11-01 15:40	80m	+4 / -	JT1BV	- / -	2	Partial capture
11-01 15:38	80m	+4 / -	ES6RQ	- / -	2	Partial capture
11-01 15:34	80m	+1 / -5	9A5E	+3 / -7	4	✓ Full exchange observed
11-01 15:32	80m	-1 / -4	UT1KWA	+13 / +3	5	✓ Full exchange observed
11-01 15:30	80m	+4 / -	UT5EL	+19 / -	4	✓ Full exchange observed
11-01 15:27	40m	-4 / -	OE5KBO	- / -	2	Partial capture
11-01 15:24	40m	-4 / -	SH7KAT	- / -22	5	Partial capture
11-01 15:21	40m	+6 / -	BA8BLK	- / -25	2	Partial capture
11-01 15:19	40m	+8 / -	ON4UR	- / -13	4	✓ Closing fragment
11-01 15:16	40m	-2 / -	DB9LG	- / -4	3	Partial capture
11-01 15:15	40m	-12 / -	M7FSE	- / -	2	Partial capture
11-01 15:11	40m	-8 / -	ON1DGN	- / -15	7	✓ Closing fragment
11-01 15:04	40m	+5 / -11	F5NAA	-10 / -	3	Partial capture
11-01 14:59	40m	-4 / -	OR1A	- / -	2	Partial capture
11-01 14:43	40m	-9 / -	PD0MNO	- / -13	4	Partial capture
11-01 14:42	40m	-4 / -	BG4UCZ	- / -	3	Partial capture
11-01 14:40	40m	-8 / -	M0CKX	- / -	2	Partial capture
11-01 14:35	40m	-8 / -	M7FSE	- / -13	5	✓ Closing fragment
11-01 13:26	40m	-4 / -	PA0MUS	- / -14	2	✓ Closing fragment
11-01 13:21	40m	0 / -	PD5MA	- / -	2	Partial capture
11-01 13:19	40m	-4 / -	DF2KD	- / -18	4	Partial capture
11-01 13:15	40m	+6 / +1	SP2L	+1 / -	4	✓ Full exchange observed
11-01 13:14	40m	+6 / -9	PD2MAC	-12 / -14	6	✓ Full exchange observed
11-01 12:55	40m	-6 / -	PD4SN	- / -14	3	Partial capture
11-01 12:53	40m	+3 / -7	9A60CBM	-13 / +2	4	Partial capture
11-01 12:45	40m	-2 / -2	S52UF	-7 / +2	8	✓ Full exchange observed
11-01 12:42	40m	-1 / -15	PD1B	-16 / -8	11	✓ Full exchange observed
11-01 12:34	40m	-2 / -	YO3GJE	-21 / -3	7	✓ Closing observed
11-01 10:40	40m	-4 / -	TA3F	- / -15	3	Partial capture
11-01 10:38	40m	+2 / -	OH5YZ	- / -11	2	✓ Closing fragment
11-01 10:37	40m	+6 / -15	SP3IPA	-5 / -2	3	Partial capture
11-01 10:36	40m	-3 / +5	UR5WJA	0 / +4	5	✓ Full exchange observed
11-01 10:34	40m	+4 / -	ZV7QSA	- / -	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
212345 -20 1415  US1ZA F4BQS JO10
212400  +6 1534  CQ US1ZA KN57 (x2)
212515 -24  815  US1ZA OH1NBF KP10
212530  +2 1426  OH1NBF US1ZA -20
212545  -7  427  US1ZA PE1NPS JO22
212545 -21  814  US1ZA OH1NBF R-07
212600  +1 1426  OH1NBF US1ZA RRR
212615 -23  814  US1ZA OH1NBF 73
212645 -11  427  US1ZA PE1NPS JO22
212700  +7 1426  PE1NPS US1ZA -18
212715 -21  427  US1ZA PE1NPS R-17
212730  +9 1426  PE1NPS US1ZA RRR (x3)

40m

UTC    dB Audio  Message
151745  -2 1666  DB9LG US1ZA RRR
151945  +7  565  ON4UR US1ZA KN57 (x4)
152145 +10  565  BA8BLK US1ZA -25 (x2)
152315  -3 1537  EX8ABR US1ZA KN57
152445  -4 1717  SH7KAT US1ZA KN57 (x5)
152715  -1 1717  OE5KBO US1ZA KN57 (x2)

20m

UTC    dB Audio  Message
182030 -13  870  US1ZA EX7DY -19
182945  -2 1017  US1ZA TA6MMI -16 (x3)

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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