All-in-One HAM Radio Signal Reports and Propagation Tools

HF Propagation Map - Help

Views

Summary: Global overview of HF activity. Each colored square represents a 4-character Maidenhead grid and is color-coded by the strongest band detected. The brighter the square, the more active that area. Use it to quickly spot band openings and see where signals are being heard worldwide. Filter by band or mode to focus on specific activity.

Reports: Detailed historical data per callsign or grid over a selectable time window (up to 24 hours). Shows great-circle arcs between your station and contacts, with direction (sent/received). Includes true two-way QSOs — contacts where both sides reported each other — highlighted from the last 10 minutes. Use the pin/grid toggle to switch between endpoint markers and grid squares. Filter by band, mode, and time window.

Reports + MUF: Combines Reports with a transparent MUF (Maximum Usable Frequency) backdrop. Your Reports arcs (solid lines) appear on top of colored MUF zones, letting you see which bands are theoretically open along your signal paths. MUF zones refresh every 5 minutes independently from your Reports data. Useful for confirming whether your contacts align with predicted propagation conditions.

Reports + VOACAP: Combines Reports with VOACAP theoretical predictions as a backdrop. Your actual Reports arcs appear as solid lines on top, while VOACAP predicted paths appear as dashed, semi-transparent lines underneath. This "Theory vs. Reality" overlay lets you compare where signals should propagate (VOACAP) against where they actually did (Reports). VOACAP refreshes every 5 minutes independently.

Cluster: Directional propagation view from a specific grid location. Spots are grouped into geographic clusters using DBSCAN spatial analysis, revealing propagation corridors and band openings toward specific regions. Each cluster is color-coded by band. Enter your grid square and click Go to see where signals are reaching from your perspective. Great for identifying which directions are open on each band.

MUF: Displays the estimated Maximum Usable Frequency between your location and grid squares worldwide. Each colored zone represents the highest amateur band likely to support propagation along that path, calculated from real spot data. Colors match the band color scheme (e.g., red = 10m, orange = 12m, green = 20m). Helps you choose the right band for a target direction before calling CQ.

VOACAP: Theoretical propagation predictions from VOACAP (Voice of America Coverage Analysis Program). Shows predicted signal paths from your grid to destinations worldwide, with arc colors indicating optimal bands and thickness showing signal quality. Predictions update hourly based on current UTC time and solar activity (SSN). Use this to plan operations or compare against actual spots in Reports views.

Realtime: Live MQTT feed from PSK Reporter showing spots as they happen in real-time. Shows activity from the last 10 seconds (no filter) or last 1 minute (callsign/grid filter). Auto-pauses when tab is hidden to save bandwidth.

POTA: Parks on the Air activations. Shows active stations in parks with propagation paths to spotters. Filter by callsign, grid, or park reference to find specific activations.

SOTA: Summits on the Air activations with summit details, altitude, points, and propagation paths to receivers. Click any ⛰️ mountain icon to filter by that specific summit and see all recent activations.

APRS: VHF propagation coverage zones based on APRS digipeater networks. Displays colored contours showing the range of each station or digipeater hop, with distance-based filtering and adjustable time windows (1-60 minutes). Helps visualize VHF/2m band coverage and identify propagation patterns.

QSO: Upload and visualize your own ADIF log on the map. Shows your contacts with paths, band/mode filters, and options to toggle arcs and time labels.

Layers

D-RAP: D-RAP (D-Region Absorption Prediction) overlays predicted HF absorption zones from solar X-ray flares on top of any active view. Absorption zones use the same band color scheme — each color represents the highest frequency affected. Refreshes automatically from NOAA data.

NA Weather: North America rain and snow radar overlay from Environment Canada. Helps correlate weather patterns with signal conditions.

How to use:

• Select a view from the dropdown: Summary, Reports, Reports + MUF, Reports + VOACAP, Cluster, MUF, VOACAP, Realtime, POTA, SOTA, APRS, or QSO.
• Use the Layers dropdown to enable overlays (D-RAP, NA Weather) on top of any view.
• Use filters (Band, Mode, Grid, Callsign, etc.) to refine results.
• Click "Go" to load filtered data for views like Cluster, Reports, or MUF.

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