Doppler Orbitography and Radiopositioning Integrated by Satellite
DORIS is a French satellite system used for the determination of satellite orbits (e.g. TOPEX/Poseidon) and for positioning. The name is an acronym of "Doppler Orbitography and Radiopositioning Integrated by Satellite" or, in French, Détermination d'Orbite et Radiopositionnement Intégré par Satellite.
Also recorded as DORIS
Doppler Orbitography and Radiopositioning Integrated by Satellite
NOAA Satellites · DORIS POS3B antennae on satellite · Public domain
- Region
- France
VALÉORINE Encyclopedia
VALÉORINE documentary reading
Documentary summary
DORIS is a French satellite system used for the determination of satellite orbits (e.g. TOPEX/Poseidon) and for positioning. The name is an acronym of "Doppler Orbitography and Radiopositioning Integrated by Satellite" or, in French, Détermination d'Orbite et Radiopositionnement Intégré par Satellite.
Admitted source layer · organised and presented by VALÉORINE
Reference Check
Propose documentary evidence for Doppler Orbitography and Radiopositioning Integrated by Satellite. A contribution is never written directly as fact: identity, source, rights and evidence gates still decide.
Sign in to contribute
World of VALÉORINE
Documentary connections
Only confirmed graph relationships appear here. Images are shown only when their identity and reuse rights both pass the documentary gate.
Documentary evidence
Documentary basis
Authority files
wikidata · Q615715
In this article
Key facts
Key facts
• Country — France • Type — Civilian • Status — Operational • Operator — CNES • Satellites Nominal — 0 (ground transmitters only)
Principle
Principle
Ground-based radio beacons emit a signal which is picked up by receiving satellites. This is in reverse configuration to other GNSS, in which the transmitters are space-borne and receivers are in majority near the surface of the Earth. A frequency shift of the signal occurs that is caused by the movement of the satellite (Doppler effect). From this observation satellite orbits, ground positions, as well as other parameters can be derived.
Organization
Organization
DORIS is a French system which was initiated and is maintained by the French Space Agency (CNES). It is operated from Toulouse.
Ground segment
Ground segment
• Illustration — The UHF transmitting antenna of DORIS ground station at Dionysos, Greece The ground segment includes about 50-60 ground stations, equally distributed over the Earth and ensure a good coverage for orbit determination. For the installation of a beacon only electricity is required because the station only emits a signal but does not receive any information. DORIS beacons transmit to the satellites on two UHF frequencies, 401.25 MHz and 2036.25 MHz.
Australian ground segments
Australian ground segments
There are two active DORIS stations in Australia: • Yatharagga - active • Orroral Valley Tracking Station - no longer active • Mount Stromlo Observatory - currently active, replaced Orroral Valley Tracking station installation
Space segment
Space segment
The best known satellites equipped with DORIS receivers are the altimetry satellites TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Michael Freilich. They are used to observe the ocean surface as well as currents or wave heights. DORIS contributes to their orbit accuracy of about 2 cm. Other DORIS satellites are the Envisat, SPOT, HY-2A and CryoSat-2 satellites.
Positioning
Positioning
Apart from orbit determination, the DORIS observations are used for positioning of ground stations. The accuracy is a bit lower than with GPS, but it still contributes to the International Terrestrial Reference Frame (ITRF).
Places
Named by the record
Places
Only places the record itself states, plotted where the house gazetteer settles their coordinates. Nothing is inferred from a name or a nationality.
- France
Primary material
Context
Doppler Orbitography and Radiopositioning Integrated by Satellite is recorded as space instrument.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Australia, c\=AU\;o\=Australia Government\;ou\=Geoscience. Doppler Orbitography and Radiopositioning Integrated by Satellite. ga.gov.au. Geoscience Australia. 15 May 2014.
- 2.Doris-Equipped Satellites.
- 3.IGN. ITRF2014. itrf.ensg.ign.fr.
Bibliography printed in the source article · 1
- G. Seeber: Satellite Geodesy. De Gruyter-Verlag, 2. Auflage (590 p.), Berlin 2003
References
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
authority record
Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
Elsewhere in Scientific instruments
736 published records in this field, each with its sources named.
- Dilution refrigeratorTerminology
- Diviner Lunar Radiometer ExperimentTerminology
- Dobson ozone spectrophotometerTerminology
- Dobsonian telescopeTerminology
- Dragon reactorTerminology
- Dunham Massey Hall sundialTerminology
- Dunn Solar TelescopeTerminology
- Dutch Open TelescopeTerminology
Best supported in this field
For owners
Own an object connected with Doppler Orbitography and Radiopositioning Integrated by Satellite?
A specialist will read what you send and tell you what the house can establish, what it cannot, and whether the object is suited to sale. There is no charge and no obligation. The object stays with you throughout; nothing is shipped to us unless it is arranged in writing beforehand.