7Z1IS — 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: Saudi Arabia Most frequent locator attributed to this token: LL34

Receiver-side FT8 activity involving 7Z1IS, decoded by SO8OO in southeastern Poland. 3,946 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 31 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-21.

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 3,946 FT8 messages attributed to 7Z1IS as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (57%), followed by 10 m (22%) and 40 m (12%). Most decodes (60%) 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 -11 dB.

Overview

3,946

Messages attributed

UTC dates decoded

335

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 352 40m · 477 20m · 2,233 10m · 884

First attributed message: 2026-06-06
Last attributed message: 2026-10-21 14:38 UTC

Observed FT8 message patterns

Attributed sample: 3,946 messages
Active dates: 31 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -20 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,098, moderate (-15 to -9 dB) 1,208, strong (≥ -8 dB) 1,640.

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 7Z1IS in decoded directed-looking exchanges:

TA2ED · Asiatic Turkey ×2 DA1BH · Fed. Rep. of Germany ×2 OE7FWJ · Austria ×2 SV7SXE · Greece ×2 TA3GO · Asiatic Turkey ×2 G0ORC · England ×2 TF4M · Iceland ×2 5B4AMX · Cyprus CR7CDR · Portugal CT5JLR · Portugal CT7AUT · Portugal DL1DH · 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 7Z1IS

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: LL34 · 2,577 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 3,567 km (approx.)
Last such locator decoded: 2026-10-21 14:38 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	7Z1IS S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 12:01	10m	- / -	SQ8DPZ	-13 / -	3	Partial capture
10-21 13:33	10m	- / -	CT4KQ	-15 / -	4	Partial capture
10-21 12:14	10m	- / -	CT2GQA	-16 / -	4	Partial capture
10-20 14:14	10m	- / -12	TF4M	-13 / -	2	Partial capture
10-18 12:44	10m	- / -	CT2HEX	-2 / -	4	Partial capture
10-18 12:43	10m	- / -	CR7BUW	-11 / -	2	Partial capture
10-18 12:40	10m	- / +9	CT7AUT	-10 / -	4	✓ Closing fragment
10-18 12:32	10m	- / -	CR7BUW	-14 / -	2	Partial capture
10-18 12:27	10m	- / -	CR7BUW	-15 / -	2	Partial capture
10-17 13:13	10m	-19 / -14	N8LRG	-16 / -5	12	Partial capture
10-17 12:54	10m	- / -	CT7AUT	-14 / -	3	Partial capture
10-17 12:54	10m	- / -9	EA7J	-17 / -	11	✓ Closing fragment
10-17 12:43	10m	- / -	CS7BPG	-13 / -	2	Partial capture
10-17 12:37	10m	- / -	CT7AUT	-11 / -	3	Partial capture
10-17 12:30	10m	-22 / -	CS7BPG	-19 / -3	5	Partial capture
10-16 22:08	40m	- / -	OK3MB	-4 / -	3	Partial capture
10-16 22:08	40m	- / -13	GI3PXT	-12 / -	2	Partial capture
10-16 21:53	40m	- / -	M8DKY	-11 / -	5	Partial capture
10-16 21:50	40m	-16 / -25	OK1TNM	+15 / -	5	✓ Full exchange observed
10-16 21:50	40m	- / -	OK3MB	-12 / -	2	Partial capture
10-16 21:40	40m	-18 / -11	TA3GO	-3 / -15	4	✓ Full exchange observed
10-16 21:38	40m	-18 / -	ES1RCG	- / -16	3	✓ Closing fragment
10-16 21:24	40m	- / -9	IZ2AMW	+8 / -	4	✓ Closing fragment
10-16 21:23	40m	-18 / -12	DC8RA	0 / -14	10	✓ Full exchange observed
10-16 21:23	40m	- / -8	EA1RFI	-2 / -	2	Partial capture
10-16 21:19	40m	- / -	G3WRO	-12 / -	4	Partial capture
10-16 21:17	40m	-17 / -	DJ7LA	- / -1	2	✓ Closing fragment
10-16 21:12	40m	- / -	MW7RHR	-9 / -	2	Partial capture
10-16 21:11	40m	- / -11	RX6ACR	-12 / -	3	✓ Closing fragment
10-16 21:11	40m	- / -	YU2MS	-18 / -	2	Partial capture
10-16 21:10	40m	- / -	M7KEV	-12 / -	3	Partial capture
10-16 20:56	40m	- / -	M5JRF	-16 / -	3	Partial capture
10-16 20:52	40m	-16 / -	PC6A	- / -3	2	Partial capture
10-16 20:48	40m	- / -	G1VWC	-10 / -	3	Partial capture
10-16 20:34	40m	- / -	M0WOO	-7 / -	2	Partial capture
10-16 20:32	40m	- / -	EA3AAY	-12 / -	3	Partial capture
10-16 20:24	40m	- / -16	R3YCJ	-8 / -	3	Partial capture
10-16 19:47	40m	- / -	ON60MWV	-1 / -	3	Partial capture
10-16 19:25	40m	- / -15	R3NC	-10 / -	3	Partial capture
10-16 19:12	40m	- / -	R1TAX	-12 / -	2	Partial capture
10-16 19:08	40m	- / -21	ON3MOH	-10 / -	3	Partial capture
10-16 19:05	40m	- / -	TA3NK	-4 / -	2	Partial capture
10-16 19:02	40m	- / -9	ER1BF	-16 / -	2	✓ Closing fragment
10-16 18:59	40m	- / -11	IZ2AMW	+21 / -	2	Partial capture
10-16 18:49	40m	-14 / -7	RA6BL	-3 / -	3	✓ Full exchange observed
10-16 18:47	40m	-10 / -10	RW6MAO	-8 / -20	3	✓ Full exchange observed
10-13 23:08	40m	- / -	F5NNN	-6 / -	5	Partial capture
10-13 23:04	40m	- / -	M9XPN	-14 / -	4	Partial capture
10-13 22:57	40m	- / -	IZ3EAW	-18 / -	2	Partial capture
10-13 22:47	40m	-13 / -	BG5JKZ	- / -3	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
144345 -20 1180  AA2EC 7Z1IS R+10
121400 -18 1862  7Z1IS CT2GQA IM58 (x4)
133330 -17 1857  7Z1IS CT4KQ IN60 (x4)
143315 -18  860  CQ 7Z1IS LL34                         a1
143445 -11  860  KR2C 7Z1IS RR73
143845 -19  860  CQ 7Z1IS LL34                         a1
120100 -13  864  7Z1IS SQ8DPZ KN09 (x3)

40m

UTC    dB Audio  Message
215430 -14  304  7Z1IS M8DKY IO93 (x3)
215645 -15 1168  CQ 7Z1IS LL34                         a1 (x4)
220800  -9 1952  7Z1IS GI3PXT -13
220815 -19 1169  CQ 7Z1IS LL34                         a1
220830  -1 1096  7Z1IS OK3MB JO70
220830 -14 1952  7Z1IS GI3PXT -13
220845 -17 1169  CQ 7Z1IS LL34
220900  -4 1096  7Z1IS OK3MB JO70 (x2)
221300 -22 1170  7Z1IS EA4IUJ IN80

160m

UTC    dB Audio  Message
192015  -9 2297  7Z1IS OZ9FF -14

80m

UTC    dB Audio  Message
213730  +5 1569  7Z1IS OK1WLM JN69
213800  +0 1784  7Z1IS SP4JSR 73
213800  -3 2752  7Z1IS SM5DXR JO89 (x3)
214000  +6  317  7Z1IS PA3FPQ JO32
214015 -24 1785  CQ 7Z1IS LL34
214030  -1 2752  7Z1IS SM5DXR JO89
214045 -24 1785  CQ 7Z1IS LL34                         a1
214100  -8 1784  7Z1IS SM5DXR JO89
214115 -24 1784  CQ 7Z1IS LL34                         a1
214130  -9 1784  7Z1IS SM5DXR JO89 (x2)
214245 -24 1785  SM5DXR 7Z1IS RR73
214300  -6 1784  7Z1IS SM5DXR 73

20m

UTC    dB Audio  Message
215345 -24 1525  CQ 7Z1IS LL34                         a1
220730 -17 1202  7Z1IS UA3VVA LO06 (x3)
221500 -13 1526  7Z1IS IW4AOT -14 (x3)
221745 -24 1525  CQ 7Z1IS LL34                         a1
222130 -14 2530  7Z1IS YO4MXK 73
223915 -23 1524  CQ 7Z1IS LL34                         a1 (x4)
230200 -11  728  7Z1IS VE3HLM FN25
004945 -24 1781  CQ 7Z1IS LL34                         a1

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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