Satellite Orbit Viewer
Plot satellite orbits from your own TLE data. Follow ground tracks and compare height, speed and viewing angles over time.
How do I plot a satellite ground track from TLE data?
Paste or open up to five named TLE element sets and choose a time window close to their epochs. SGP4 propagation calculates ground tracks, height above the reference ellipsoid, speed and observer elevation. Move the time slider to inspect positions, compare objects and export ground tracks as GeoJSON or samples as CSV. The included example uses historical data and its matching date.
Follow an orbit. Plan a pass.
Your elements. Your location. A clear view of the prediction.
The example is a historical Vanguard verification set from June 2000. For a present-day prediction, supply fresh orbital elements and update the start time.
Enter times as UTC, for example 2026-10-01T00:00:00Z. Display zone uses names such as America/Toronto. Latitude is positive north; longitude is positive east.
Your chart and event list will appear here.
Three simple steps
How to use Satellite Orbit Viewer
Choose an observer location, UTC time range and display time zone.
Calculate, explore the results and inspect event details.
Save your settings and download a calendar or data report.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
Calculations run locally in a cancellable browser worker. Terrain, clouds and weather are not modelled. Times use UTC inputs and your chosen IANA zone for display. Save a project file to keep your settings. No live TLE feed is fetched. Fresh orbital elements are essential: drag and manoeuvres can invalidate predictions. The bundled example is historical.
Up to five TLEs, 5,000 input characters, 72 hours and 25,000 output samples. Predictions must stay within 30 days of each element epoch. Sampling steps: 10–600 seconds.