Question 1

What is a TLE (Two-Line Element)?

Accepted Answer

A TLE is a standardized format for describing a satellite's orbit using two 69-character lines. It includes the satellite name, orbital elements (inclination, eccentricity, etc.), and epoch time. TLEs are used with the SGP4 propagation algorithm to predict satellite positions.

Question 2

How do I convert TLE to OMM format?

Accepted Answer

Paste your TLE data into the viewer and click the 'Convert to OMM' option. The tool generates CCSDS-compliant Orbit Mean-Elements Message (OMM) in XML or KVN format. OMM is the modern standard for orbital data exchange used by space agencies worldwide.

Question 3

What is CCSDS OMM?

Accepted Answer

OMM (Orbit Mean-Elements Message) is a CCSDS (Consultative Committee for Space Data Systems) standard for representing orbital data. Unlike the legacy TLE format, OMM uses clear field names, supports units, and includes metadata. It's the recommended format for modern space operations.

Question 4

Where can I get TLE data for satellites?

Accepted Answer

CelesTrak (celestrak.org) provides free TLE data for thousands of satellites, updated regularly. Space-Track.org (requires registration) provides official TLEs from the U.S. Space Force. Our satellite search tool also provides TLE data for any cataloged satellite.

Question 5

How does the 3D orbit visualization work?

Accepted Answer

The viewer uses the SGP4 propagation algorithm to calculate satellite positions from TLE data. It renders the full orbital path as a 3D ellipse around Earth, showing the satellite's current position, ground track, and orbital plane. You can rotate and zoom to explore the orbit from any angle.

Help & Guide

Orbit Viewer

How to Use

Features

TLE Format

OMM Format (CCSDS)

FAQ

Related Tools

Ground Track

Frame Converter