Opening TLE Files

The TLE file type is primarily associated with SGP4Propagator.

TLE	File extension: TLE
	File type:	data file

What is a TLE file?

TLE files mostly belong to SGP4Propagator. An TLE file is a satellite orbit data file that holds a standard Two-Line Element set.
It stores numerical data for a satellite's orbital parameters using a fixed two‐line format.

Orbit parameters: Values such as inclination, eccentricity, and right ascension.
Epoch details: The time at which these parameters are valid.

Programs like SGP4Propagator use this data to calculate and predict satellite positions.
FilExt.com note: For further details on the SGP4 algorithm, refer to this page.

How to open TLE files

You need a suitable software like SGP4Propagator to open a TLE file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your TLE file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a TLE file directly in the browser:. Just drag the file onto this browser window and drop it.

Online TLE Text Viewer

Choose your .tle file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert TLE files:

SGP4Propagator
See the previous paragraphs to learn more about the main application. TLE files are often referred to as SGP4Propagator data files because this type of file is primarily created or used by this software.
dpsVelocity (TimeLine File) by Leitch Technology Corporation
NASA Two-Line Element Set

Technical Data for TLE File Extension

File classification:

Data

Related files:

tle, eph, sp3, i11, txt, bsp, jpg, dat

a tle data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with TLE files

Associate the TLE file extension with the correct application.
Update your software that should actually open data files. Because only the current version supports the latest TLE file format. Search, therefore, e.g. on the manufacturer website after an available SGP4Propagator update.
To make sure that your TLE file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .TLE file online - secure, fast, and no downloads needed.