Satellites 0
No satellites loaded
Click + Add Satellite to start tracking.
0 above horizon
Next contact: —
Pass Predictions
No passes calculated
Select a satellite and click Calculate to see upcoming passes.
Space Weather
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Conjunction Warning
Threshold: km
Click Scan to check for close approaches.
Pass Timeline (Gantt)
Calculate passes first, then click Build.
Visibility Map
Shows where selected satellite is visible (min el: 5°)
Observation Log
Config Export / Import
Pass Overlap
Windows when 2+ satellites are visible simultaneously.
Click Scan to find overlapping passes.
Multi-Observer Compare
Next pass for selected satellite from each loaded station.
Load stations and select a satellite, then click Compare.
ISS Crew
Current crew aboard the International Space Station.
Pass History & Stats
Automatically logged passes from your station.
Reentry Tracker
Click Refresh to load decaying objects from CelesTrak.
Upcoming Launches
Click Load to fetch upcoming launches.
Eclipse Prediction
Next 24 h shadow crossings for selected satellite.
Select a satellite and click Compute.
Ground Track Heatmap
24-hour pass density for all loaded satellites.
Observing Conditions
Live sky conditions from Open-Meteo for your station.
Tracker
Map
Map Theme
Sky View
Share
Encodes observer + loaded satellites into URL.
Pass Prediction
Notifications
Sound Alerts
Notifications
Off
Auto TLE Refresh
Rig Control (WebSerial — Chrome/Edge)
● Disconnected
Antenna Rotator (GS-232 / WebSerial)
● Disconnected
Sends W{az}{el} commands automatically while satellite is above horizon.
Keyboard Shortcuts
Night-Mode Timer
Automatically switch to dark theme at night.
Backup & Restore
Export all satellites, stations and settings to a JSON file.
Details
No satellite selected
Select a satellite from the list to see live telemetry.