SP7ZM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO01

Receiver-side FT8 activity involving SP7ZM, decoded by SO8OO in southeastern Poland. 240 FT8 messages attributed to this token as transmitter, on 80m, 60m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-30.

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 240 FT8 messages attributed to SP7ZM as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (99%), followed by 60 m (1%). Most decodes (86%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (98%); the estimated median was +10 dB.

Overview

240

Messages attributed

UTC dates decoded

Active 15-min windows

+10 dB

Estimated median S/N

Bands

80m · 237 60m · 3

First attributed message: 2026-06-06
Last attributed message: 2026-08-30 17:51 UTC

Observed FT8 message patterns

Attributed sample: 240 messages
Active dates: 18 UTC dates
Estimated median S/N: +10 dB
Estimated 10th-90th percentile: -1 to +17 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 236.

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 SP7ZM in decoded directed-looking exchanges:

GJ0KYZ · Jersey PD9FLX · Netherlands RU3GF · European Russia SV1CQN · Greece SQ8NGI · Poland DB100FT · Fed. Rep. of Germany DD0AM · Fed. Rep. of Germany DO1FZL · Fed. Rep. of Germany DO4LC · Fed. Rep. of Germany DO9BAU · Fed. Rep. of Germany DO9JTR · Fed. Rep. of Germany OK1AR · Czech Republic

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 SP7ZM

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: KO01 · 57 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 182 km (approx.)
Last such locator decoded: 2026-08-22 21:08 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	SP7ZM S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 17:47	80m	-9 / -5	DO9BAU	-1 / -	4	✓ Closing observed
08-30 17:46	80m	-2 / -10	SP7CWZ	0 / -12	4	✓ Full exchange observed
08-30 17:41	80m	- / -16	UR9QQ	-20 / -	2	✓ Closing fragment
08-29 20:39	160m	- / -18	SQ8NGI	-5 / -	2	✓ Closing fragment
08-28 18:39	80m	- / -1	SP5DFK	-3 / -	2	Partial capture
08-28 18:39	80m	- / -	DL9KM	-8 / -	7	Partial capture
08-28 18:38	80m	+6 / -5	SP9CXN	+12 / 0	4	✓ Full exchange observed
08-28 18:31	80m	+8 / -	SP5DFK	- / -10	12	Partial capture
08-28 18:29	80m	- / -10	YO4NT	+8 / -	2	Partial capture
08-28 18:29	80m	+15 / +3	YL2NX	-3 / -	3	✓ Closing observed
08-22 21:08	80m	+11 / -	IQ4JO	-2 / -4	7	Partial capture
08-22 20:54	60m	-8 / -	DD6ZV	- / -9	3	Partial capture
08-22 20:46	80m	+4 / -	II7MGBA	- / +1	4	Partial capture
08-22 20:44	80m	+5 / -	SQ8NGI	- / 0	2	Partial capture
08-22 20:43	80m	+12 / -	SP7ROM	- / -2	2	Partial capture
08-22 20:41	80m	+9 / -	CT3MD	- / -8	2	Partial capture
08-22 20:38	80m	+6 / -	EA7LIC	- / -7	2	Partial capture
07-29 19:17	10m	- / -	SV2CLJ	-13 / -	2	Partial capture
07-29 19:15	80m	+15 / +9	RA2FU	+8 / -2	5	✓ Full exchange observed
07-28 20:56	80m	+16 / -	OE9GWV	-4 / -19	4	Partial capture
07-28 20:51	80m	+12 / +9	SP3PLD	+12 / +2	5	✓ Full exchange observed
07-28 20:46	80m	+14 / +8	PA4CC	+4 / -7	4	✓ Full exchange observed
07-28 20:45	80m	+15 / +3	SP1RKT	+12 / +1	4	✓ Full exchange observed
07-28 20:43	80m	- / -12	RA3TOS	-14 / -	16	Partial capture
07-28 20:42	80m	+14 / +10	DO4LC	-15 / -13	8	✓ Full exchange observed
07-28 20:40	80m	+15 / -3	SV3CKF	-8 / -13	4	✓ Full exchange observed
07-28 20:38	80m	+16 / -1	OK1AR	+15 / -3	4	✓ Full exchange observed
07-28 20:36	80m	+14 / -	SP2FWC	+12 / -1	4	✓ Full exchange observed
07-27 19:45	80m	+14 / -	VE2OPC	- / -14	12	Partial capture
07-27 16:20	80m	+8 / -9	HG8LXL	-13 / -8	2	Partial capture
07-27 16:08	80m	+5 / -18	SQ7LQZ	0 / +1	5	✓ Full exchange observed
07-24 18:34	80m	+15 / -	4O/YT4ZZ	- / -9	4	Partial capture
07-24 18:32	80m	+18 / -	DB100FT	- / -9	2	Partial capture
07-24 18:30	80m	- / -2	YO4NT	+8 / -	2	Partial capture
07-24 18:30	80m	- / +5	DB100FT	-8 / -	2	✓ Closing fragment
07-24 14:32	10m	- / -	DL8TT	-5 / -	2	Partial capture
07-24 14:27	10m	- / -	F4LML	-6 / -	2	Partial capture
07-24 14:27	10m	- / -13	SV1CQN	-4 / -	2	✓ Closing fragment
07-23 17:21	80m	+18 / -	DO9JTR	- / -20	2	✓ Closing fragment
07-23 17:17	80m	+18 / -	DD0AM	-15 / -19	3	✓ Closing observed
07-20 17:38	80m	+12 / -12	DO1FZL	-11 / -18	5	✓ Full exchange observed
07-20 16:52	10m	- / -1	PD9FLX	-1 / -	3	✓ Closing fragment
07-20 15:02	10m	- / -	RU3GF	-14 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184215  -9 2245  SP7ZM DL9KM JN68
174015  +9 1092  Z62NS SP7ZM -15
174100 -22 1102  SP7ZM UR9QQ R-16 (x2)
174215  +2 1092  YO4NT SP7ZM 73
174630  -6 1092  SP7CWZ SP7ZM -12
174645  -4 1503  SP7ZM SP7CWZ R-10
174700  +1 1092  SP7CWZ SP7ZM RR73
174715  +4 1503  SP7ZM SP7CWZ 73
174715  +0 2402  SP7ZM DO9BAU JO62 (x2)
174800  -9 1091  DO9BAU SP7ZM RR73
174815  +1 2401  SP7ZM DO9BAU 73
174930 -13 1092  SO8DAN SP7ZM -01
175115  +0 1092  ES5MG SP7ZM -17

160m

UTC    dB Audio  Message
203945  -2 1326  SP7ZM SQ8NGI R-18 (x2)

60m

UTC    dB Audio  Message
205430  -9 1151  DD6ZV SP7ZM -09 (x3)

10m

UTC    dB Audio  Message
080745 -21 1591  SP7ZM GJ0KYZ 73
150215 -15 2414  SP7ZM RU3GF RR73 (x2)
165200  -5 2527  SP7ZM PD9FLX JO22 (x3)
142700  +1 2538  SP7ZM SV1CQN R-13 (x2)
142730  -8 2740  SP7ZM F4LML JN29 (x2)
143200  -9 1842  SP7ZM DL8TT JO30 (x2)
191700 -11  802  SP7ZM SV2CLJ KN10 (x2)
155215 -20 1946  SP7ZM LX1RFJ R-14

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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