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4ham Spectrum Analysis v0.12.3 - Academic Analytics

Coded & Powered by CT7BFV · Octávio Filipe Gonçalves · 4ham Spectrum Analysis

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Period

Band

Mode

Total events

Unique callsigns

Avg SNR FT4/FT8/WSPR

Avg SNR CW/SSB

Global Propagation

Confirmed decodes only (verified callsign).
No callsign = band occupancy.

Best band

QTH-Centric Propagation Map

NOAA propagation zones vs real SDR contacts — select bands, drag to rotate, scroll to zoom (CTRL+ Mouse Wheel).

Event Time Series

Total hourly volume for the selected period.

Distribution by Band and Mode

Stacked bars with a breakdown by mode.

SSB FT8 FT4 CW WSPR

Hour of Day x Band Activity (Heatmap Pro)

High-contrast heatmap with cross-highlighting and marginal totals.

Top Callsigns in Period

Top 20 callsigns by number of occurrences.

ⓘPropagation scores are based on confirmed decodes only — events with a verified callsign, regardless of mode. Detections without a callsign reflect band occupancy and do not contribute to propagation calculation.

Propagation Score by Band

Confirmed decodes only (verified callsign) — weighted average by activity in the selected period.

Propagation Time Trend

Global propagation score per hour — confirmed decodes only (verified callsign).

Data snapshot 2026-04-03 12:10 UTC

Update frequency --

Analyzed period --

Data quality Consistency: 99.2%