Satellite Tracker

TLE Format

Two-Line Element (TLE) sets are used to describe the orbital elements of satellites. Each TLE consists of two 69-character lines:

Where:

• NSSSS - Satellite number
• E - Classification (U=Unclassified)
• CCYYDDD - International Designator (Century, Year, Day of year)
• DDDDDDDDD - Element number and revolution number
• IIII.IIII - Inclination (degrees)
• RRRR.RRRR - Right ascension of the ascending node (degrees)
• RRRRRRR - Eccentricity (leading zero and decimal point not included)
• FFFF.FFFF - Argument of perigee (degrees)
• GGG.GGGG - Mean anomaly (degrees)
• HHHHH.HHHHHHHH - Mean motion (revolutions per day)

OMM Format

Orbital Mean-Elements Message (OMM) is a newer format developed by CCSDS to replace TLEs, supporting more advanced tracking capabilities.

Two formats are supported:

• JSON Format: A structured data format with key-value pairs
• KVN Format: A human-readable format with "key = value" pairs on separate lines

You can get TLE and OMM data from sources like Celestrak.

Satellite Tracker is a free browser-based tool that allows you to track satellites in real-time using TLE (Two-Line Element) or OMM (Orbital Mean-Elements Message) data.

The application calculates satellite positions using the satellite.js library, providing accurate orbital mechanics calculations directly in your browser.

Whether you're a space enthusiast, amateur astronomer, or professional, Satellite Tracker provides the tools you need to track satellites without any server requirements.

All calculations happen directly in your browser - your data never leaves your device, ensuring complete privacy and security.

The application supports both legacy TLE format and the newer OMM format for enhanced tracking capabilities.

Technical Details

Satellite Tracker uses the SGP4/SDP4 orbital propagation algorithms through the satellite.js library. The application architecture follows a modular design pattern with separate modules for:

• Orbital element parsing and validation
• Satellite position calculation
• Coordinate transformation
• User interface handling

The frontend is built with vanilla JavaScript for optimal performance without external dependencies. The responsive design uses CSS3 Flexbox and Grid layouts for consistent experience across devices.

No cookies or tracking scripts are used. All processing is done locally in the browser.