How to Track Satellites in Real Time
A complete beginner's guide to real-time satellite tracking. Learn how to use a free satellite tracker online, follow the ISS, Starlink, GPS satellites, and thousands more — directly from your browser, no sign-up required.
Best Free Satellite Tracker Online in 2025
Discover the best free satellite tracking websites available right now. We compare the top tools, explain what makes SatFleet Live stand out, and show you how to track satellites online for free with no registration needed.
What is a TLE and How to Read It
Understand the Two-Line Element format that powers every satellite tracker online. Learn to read each field, interpret real TLE data from the ISS, and discover how SGP4 turns two lines of text into a real-time satellite position.
How Satellite Orbits Work: A Beginner's Guide
Discover the three main satellite orbit types — LEO, MEO, and GEO — and understand how altitude affects speed, coverage, latency, and tracking. Includes real examples with the ISS, Starlink, GPS, and geostationary weather satellites.
Next Passes: How to Predict Satellite Overheads
Learn how to predict when satellites will pass overhead using SatFleet Live. Includes step-by-step guides for planning an ISS sighting, spotting Starlink trains, interpreting pass data, and tips for a successful naked-eye observation.
Why Are Satellites So Bright? Flares and Visibility Explained
Discover why some satellites outshine the stars, what causes satellite flares, why they sometimes vanish mid-pass, and why freshly launched Starlink trains are so spectacular. Includes a visual magnitude scale and tips to predict brightness before a pass.
Ready to track satellites live?
Open the SatFleet Live map and follow over 14,000 satellites in real time — no account, no download, completely free.
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