FAQs
Will the Galileo navigation system be compatible with the American GPS?
The Galileo system is designed to be compatible and interoperable with GPS. The Galileo geodetic reference frame will be linked to ITRF (International Terrestrial Reference Frame) to which the GPS Reference frame is also linked. There are also plans to broadcast the time offset between Galileo and GPS times.
Recent discussions have concluded that the GPS and Galileo signals are fully compatible from a radio frequency point of view. Working together, Galileo and GPS will improve continuity and availability for the ATC users.
Why are the European launchers called Ariane?
Initially named LS3 for "Lanceur trois étages de substitiution", in 1971 it was decided to find a less technical name for the European launcher. Three names were proposed: Penelope, Phoenix and Ariane. ESA chose the last. Its origin goes back to "Ariane’s thread" and the mythological legend of Thesee.
For more information on how to see a launch check Attend a launch
I want to use ESA photos/material. How should I proceed with the copyright issue?
You may freely use the images you find on our site, as long as it is not for commercial use. You may not modify the images. If you intend to use any of the images on a website, please acknowledge that it originates from ESA. For more information, see our Terms and Conditions of use.
I need some information about ESA images. Who can I contact?
Send your request to spaceinimages@esa.int.
Where can I find technical information/images regarding Earth Observation satellites?
Refer to ESA's Earthnet Online Service, which contains many resources on Earth Observation. We also maintain Envisat, MSG and MetOp websites.
I'm looking for the ESA Bulletin. Where can I find this and other publications?
ESA maintains its own Publications website, where a variety of publications may be accessed.
Where can I find out about past ESA projects?
Go to the Publications website, where you can find articles about past projects. Also, you may access ESA's individual programme pages to find out more about older missions.
I am a registered member of the media. How can I contact an ESA spokesperson?
You can make a request to media@esa.int.
I would like information about upcoming events/conferences. Where can I look?
You can find a list of current and future conferences, symposia and workshops with ESA involvement at ESA List of Events.
Can I visit ESA establishments?
The following public visits are possible around our establishments:
- Visit ESTEC (Noordwijk, NL), for info in English click here ; for info in Dutch click here
- Visit ESRIN (Frascati, IT) - visits for schools and tertiary education students, click here
- Visit ESOC (Darmstadt, DE), for info in English click here ; for info in German click here
- Visit ESAC (near Madrid, ES) - visits for schools, click here ; visits for universities, click here
- Visit EAC (Cologne, DE), for info in English click here ; for info in German click here
- The ESA HQ Astrolabe exhibition (Paris, FR) is currently closed, we will provide more information when it has reopened