E File

What are E files and how to open them

Are you having problems opening an E file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an E file?

An .E file is a STK Ephemeris Format Data file.

Ephemeris files, used by the System Tool Kit (STK) software to analyze and visualize spacetime events, provide a predicted path of movement for an astronomical object (such as a planet, moon, or satellite) over a specific period.

STK utilizes precise ephemeris data to predict the speed and location of objects in space, taking into account the gravitational impacts of other celestial bodies and other elements that can impact their movement. This information can be applied for a variety of purposes, like mission planning and assessment, satellite monitoring, and navigating from one place to another in the sky.

The STK Ephemeris Format is an STK-specific file structure used to store ephemeris data. It features a text format composed of multiple records, each representing the position and velocity of one object at any specific point in time. Additionally, the header section in this format contains information regarding the details and duration of the data as well as positional and velocity values across all objects in said timeline.

How to open E files

We have identified one E opener that is compatible with this specific type of E file.

Programs that open STK Ephemeris Format Data files


Last updated: February 24, 2023

Various apps that use files with this extension

These apps are known to open certain types of E files. Remember, different programs may use E files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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File.org helps thousands of users every day, and we would love to hear from you if you have additional information about E file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.