Mobile version

Doris, the space surveyor

The Doris system is a French civil precise orbit determination and positioning system. It is based on the principle of the Doppler effect with a transmitting terrestrial beacons network and onboard instruments on the satellite's payload (antenna, radio receiver and oscillateur ultra-stable).

Doris is one of three systems used for precise determination of the Jason-1 satellite's orbit. Several of these techniques are sometimes merged on the same satellite : Jason-1 satellite includes three tracking systems, Doris, location by GPS and laser telemetry. The Doris system perfectly corresponds to the specifications required for the ocean's topography observations and the amplitude of the observed phenomena: it is now enables to measure the satellite position on its orbit close to 1 cm. It is interesting to compare this precision with the precision obtained at the beginning of the space age, where the the satellite position was estimated close to 20 km then close to 20 meters in the 80's. Since 1998, the Diode navigator has added real-time measurement processing capability for satellite navigation.

The Doris system was designed by Cnes, the French space agency, in partnership with France's mapping and survey agency IGN and the space geodesy research institute GRGS. Since 2003, IDS is an international service which provides a support, through Doris data and products. The successive missions since Spot 2 and Topex/Poseidon have truly demonstrated its performance.

  • Principle

    How does Doris work? The Doris system is based on the principle of the Doppler effect. It is a system optimized for orbit determination with extreme precision, global coverage and all-weather measurements.


  • DORIS system

    Details on Doris instrument which is part of the satellite payload, on terrestrial stations, on control and processing center and on system enhancements.

  • DORIS applications

    In addition to its functions in orbitography, Doris as a space surveyor is also a terrestrial positioning system that has found many applications in geodesy and geophysics.

  • DORIS missions

    With more satellites carrying the Doris instrument, the system will make more accurate than before.

IDS Newsletters

The newsletter is published in color with live links on the IDS web site.

  • Press release, 2016: DORIS the space surveyor serving the ITRF
  • Leaflet 2015, "Doris, the space surveyor" (pdf, 6.8 Mb). Three kakemonos also exists (pdf, 4.5 MB)
  • Leaflet 2012, "Doris, a permanent evolving space technique for Earth sciences research" (pdf, 1.6 Mb). A poster also exists (pdf, 3.3 MB)
  • Dossier 2010 : Doris, the space surveyor (pdf, 6 Mo),  edited by Cnes and IGN at the occasion of the 20th anniversary of Doris in 2010.
Rss feedsContactPartnersFAQLexiconLegal noticePersonal Data Protection PolicyMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

This home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!