You have a question? You didn't find the answer?
Please send your question to the
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
.
What's DORIS?
See the official website.
What kind of information may be found on which center?
IDS has three data/information centers:
What is the nominal data delivery time?
DORIS measurement files are usually delivered to the Data Centers with the following times:
- SPOT4: 4 weeks
- SPOT5: 4 weeks
- ENVISAT: 4 weeks
- JASON1: 4 weeks
- JASON2: 4 weeks
- CRYOSAT2: 4 weeks
Delivery times are linked to processing time of the precise orbit ephemeris ( POE), and in particular to the collect of precise measurement of the solar activity and Earth orientation parameters.
Delays may temporarily increase due to manpower availability.
Stations Network
- Permanent sites, colocations
- This global map shows the current network. .
- General information (Site log)
- For general information such as site description, local ties, beacon identification, go to the Site log pages.
- ITRF2008 coordinates and velocities
- They may be found directly in sinex format for the DORIS network on the dedicated ITRF ftp site.
See also the complete ITRF2008 for all space geodesy techniques.- Ground antennas
- There are two types of ground antennas. See the geometrical caracteristics and examples of the two types of antennas: Galapagos (Alcatel), Santa Cruz (Starec).
- Satellite visibility
- The maps for the Envisat and Jason satellite orbit show the visibility circle around each station with a given cut-off angle over the horizon.
- Host agencies
- The network of DORIS permanent stations is one of the essential component of the system. It is in operation for more than ten years. The host agencies play a key role for the maintenance of the stations with an onsite support.
- Maintenance, renovation
- The IGN/ SIMB is in charge of the maintenance of the network.
- Contact
- Bruno Garayt from IGN is responsible for the DORIS network.
- The DOMES Numbering System
- DOMES (Directory Of MERIT Sites) is a numbering system for the space geodetic sites. It was designed at the start of the MERIT (Monitoring of Earth Rotation and Intercomparison of the Techniques of Observation and Analysis) campaign in early 80s in order to give an unambiguous identifier to all instrument reference points and markers involved in this MERIT campaign.
The first publication of this information was done in a catalogue published by the Bureau International de l'Heure (BIH) and entitled "Directory Of MERIT Sites", hence DOMES. The BIH, together with the IGN group, was acting as MERIT coordinating center.
Since the official start of IERS in 1988, the TRF section of the IERS/CB continued this task for all ITRF contributing stations.
More details about the DOMES Numbering System can be found at http://itrf.ensg.ign.fr/domes_desc.php.
For information about the MERIT project, see http://www.to.astro.it/sarasso/MERIT.htm.- Frequency shift of the 3rd DORIS beacon generation
- The transmitted frequencies of the 3rd DORIS beacon generation may be shifted with respect to the nominal DORIS frequencies to avoid jamming with other DORIS stations in the vicinity. This function is only used when two channels are available on the DORIS instrument that is to say with SPOT5, JASON, ENVISAT and the soon CRYOSAT. See a detailed description and the history list of the stations using the shifted mode.
