DF7IS — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JN49

Receiver-side FT8 activity involving DF7IS, decoded by SO8OO in southeastern Poland. 43 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-11-03.

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 43 FT8 messages attributed to DF7IS as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (77%), followed by 40 m (21%) and 80 m (2%). In this small sample, the estimated median decoder S/N was -14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 1 60m · 33 40m · 9

First attributed message: 2026-07-09
Last attributed message: 2026-11-03 13:58 UTC

Observed FT8 message patterns

Attributed sample: 43 messages
Active dates: 3 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -16 to +3 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 10.

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 DF7IS in decoded directed-looking exchanges:

DK0KO · Fed. Rep. of Germany DL8WO · Fed. Rep. of Germany IN3LHF · Italy DG1VB · Fed. Rep. of Germany DG1VL · Fed. Rep. of Germany DH9DR · Fed. Rep. of Germany IV3NBD · Italy SP3HCA · Poland

Most frequent locator attributed to DF7IS

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: JN49 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 920 km (approx.)
Last such locator decoded: 2026-11-03 13:58 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	DF7IS S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 13:52	60m	-17 / -9	SP3HCA	-1 / -	4	✓ Closing observed
11-03 13:51	60m	-15 / -	DG1VB	- / +3	2	✓ Closing fragment
11-03 13:46	60m	-14 / +2	DH9DR	-11 / +10	5	✓ Full exchange observed
11-03 13:41	60m	-13 / +7	DG1VL	-3 / -2	7	✓ Full exchange observed
11-03 13:41	60m	-14 / -6	IV3NBD	-21 / -8	5	✓ Full exchange observed
09-05 18:53	40m	+5 / +3	DL8WO	-1 / +6	6	✓ Full exchange observed
09-05 18:53	40m	+5 / -	IN3LHF	-4 / -4	3	✓ Closing observed
09-05 18:50	40m	- / -	SP6FME	+1 / -	3	Partial capture
09-05 18:48	40m	+3 / +5	DK0KO	0 / +4	6	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
135130 -16 1089  DG1VB DF7IS RR73
135200 -15 1089  CQ DF7IS JN49 (x2)
135245  -2 1089  DF7IS SP3HCA JO82 (x2)
135330 -17 1089  SP3HCA DF7IS RR73
135345  +2 1089  DF7IS SP3HCA 73
135400 -14 1089  CQ DF7IS JN49 (x8)

40m

UTC    dB Audio  Message
185000  +0 2257  DF7IS DK0KO RRR
185015  +1 2862  DK0KO DF7IS 73
185030  +0 2861  DF7IS SP6FME JO90 (x3)
185245  +2 2861  CQ DF7IS JN49
185315  +6 2861  IN3LHF DF7IS R-04
185330  -4 2862  DF7IS IN3LHF RR73
185330  +1 2258  DF7IS DL8WO JO30
185345  +4 2861  IN3LHF DF7IS 73
185400  -1 2258  DF7IS DL8WO JO30
185415  +8 2861  DL8WO DF7IS +06
185430  -1 2258  DF7IS DL8WO R+03
185445  +2 2862  DL8WO DF7IS RR73
185500  -3 2258  DF7IS DL8WO 73

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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