SP7ESI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO91

Receiver-side FT8 activity involving SP7ESI, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-10-02.

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 9 FT8 messages attributed to SP7ESI as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was +3 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+3 dB

Estimated median S/N

Bands

80m · 9

First attributed message: 2026-10-02
Last attributed message: 2026-10-02 21:26 UTC

Observed FT8 message patterns

Attributed sample: 9 messages
Active dates: 1 UTC dates
Estimated median S/N: +3 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with SP7ESI in decoded directed-looking exchanges:

DC5CH · Fed. Rep. of Germany DG7WA · Fed. Rep. of Germany EI9GNB · Ireland EX7CQ · Kyrgyzstan TA7ARH · Asiatic Turkey UA4FKT · European Russia US5WFL · Ukraine

Most frequent locator attributed to SP7ESI

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: JO91 · 3 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 262 km (approx.)
Last such locator decoded: 2026-10-02 21:14 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	SP7ESI S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-04 00:10	40m	- / -	TA2EE	-23 / -	5	Partial capture
10-04 00:08	40m	- / 0	EI9GNB	-12 / -	3	Partial capture
10-04 00:02	40m	- / 0	EX7CQ	-7 / -	3	✓ Closing fragment
10-03 22:37	40m	- / -	UR9QQ	-18 / -	2	Partial capture
10-02 21:25	80m	+7 / -13	TA7ARH	+4 / -9	3	✓ Full exchange observed
10-02 21:17	80m	- / -	DK8HC	+1 / -	5	Partial capture
10-02 21:16	80m	+6 / -	US5WFL	- / -6	2	✓ Closing fragment
10-02 21:15	80m	+2 / -10	RN6HK	0 / -1	5	Partial capture
10-02 21:11	80m	-2 / -	EA7LIC	-6 / -11	6	Partial capture
10-02 21:11	80m	- / -2	UA4FKT	+4 / -	4	✓ Closing fragment
10-02 18:15	40m	- / +3	DC5CH	-4 / -	4	✓ Closing fragment
10-02 18:15	40m	- / +5	UR3CFC	+2 / -	2	Partial capture
10-02 18:14	40m	- / -6	DG7WA	-4 / -	7	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
182530  -3 1704  SP7ESI UR3CFC KN58
223745 -17 1541  SP7ESI UR9QQ KN77 (x2)
000230  -9 1716  SP7ESI EX7CQ +00 (x3)
000830 -14  883  SP7ESI EI9GNB IO51 (x2)
001030 -22 1663  SP7ESI TA2EE KM69
001030 -11  883  SP7ESI EI9GNB R+00
001100 -24 1663  SP7ESI TA2EE KM69 (x4)
001430 -12  883  SP7ESI EI9GNB 73

80m

UTC    dB Audio  Message
211500  +1 1627  SP7ESI RN6HK LN14 (x2)
211545  +2 1627  RN6HK SP7ESI -01
211600  +1 1627  SP7ESI RN6HK R-10 (x2)
211645  +4 1627  US5WFL SP7ESI R-06 (x2)
211730  +0  565  SP7ESI DK8HC JO42 (x5)
212515  +4  746  SP7ESI TA7ARH -13 (x2)
212600  +7 1627  TA7ARH SP7ESI R-09

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