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.
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 latter. 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
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.
Send your request to spaceinimages @ esa.int.
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 homepage, where you can find articles about past projects. Also, you may access ESA's individual programme pages to find out more about older missions.
Please send a request to email@example.com and our technicians will help you.
You can make a request to firstname.lastname@example.org.
Please pose these questions via e-mail to the ESA Web Helpdesk, we do not maintain public lists of ESA employees on the Internet.
The ESA Portal is optimised for use with Internet Explorer version 5.x and Netscape Navigator version 6.2.x for Windows and Macintosh. These browsers can be obtained for free from http://www.microsoft.com or http://www.netscape.com More information is available on the Help page.
ESA headquarters in Paris houses the Director General's office, the main programme directorates as well as general administration. No visits are possible.
Please access this page for full information on visiting ESOC.
ESTEC welcomes a limited number of groups of students per year. Groups should have a relevant background and be 15-25 people. Visits normally take half a day. To request a visit, please send a fax at least 3 months before the preferred date to the Communication Office in ESTEC (+31 71 565 5728), stating the background, interests and size of the group, and some preferred dates. All other interested groups and individuals are invited to visit ESTEC’s visitors’ centre Space EXPO next door. During the weekends and holidays, you can take the "Space Train" three times per day to visit the facilities at ESTEC. For more information see http://www.space-expo.nl (mostly in Dutch) or call +31 71 3646446
Last update: 4 March 2013