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4ham Spectrum Analysis v0.15.0 - Academic Analytics

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

Last API data query: --

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Scan status unavailable
Total events
Unique callsigns
Avg SNR FT4/FT8/WSPR
Avg SNR CW/SSB
Global Propagation
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Top 3 Bands
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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%
Coded & Powered by CT7BFV  ·  © 2026 Octávio Filipe Gonçalves | License: GNU AGPL-3.0
Total stations
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Total packets
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RF / TCP
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Max distance
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Unique digipeaters
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APRS Station Map

All stations with position in the selected period — RF (orange), APRS-IS (green) and LoRa APRS (magenta).

📻 RF (Direwolf) 🔁 RF-gated (3rd-party / TCPIP) 🌐 APRS-IS (TCP) 📡 LoRa APRS QTH

Distance Distribution

Distribution of station distances from QTH (km).

Temporal Activity

Hourly APRS packet volume for the selected period.

Top Active Stations

Top 20 APRS callsigns by number of packets.

Source Breakdown

RF vs APRS-IS packet ratio.

Data snapshot --
Analyzed period --
Próxima atualização --
Data source APRS-IS + Direwolf
Coverage radius 50 km
Coded & Powered by CT7BFV  ·  © 2026 Octávio Filipe Gonçalves | License: GNU AGPL-3.0

Historical analysis only — not the current slot state.

Global score
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Best band
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Detected slots
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Beacons heard
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NOAA Kp / SFI
Kp
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SFI
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Recent activity - last 12 h

Historical matrix by scheduled beacon slot and band.

Beacon + NOAA reading

Quick read

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Nowcast

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Propagation by band

Ionospheric context

Beacon Detection Map — NCDXF/IARU

QTH → arcs to detected beacons in the analysis window. Grey dots = monitored without copy.