DORIS measurement files are usually delivered to the Data Centers with the following times:
• SPOT2: 4 weeks
• SPOT4: 4 weeks
• SPOT5: 4 weeks
• JASON: 2 to 3 weeks
• ENVISAT: 4 to 6 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.
 

ITRF2000 coordinates and velocities

They may be found for a given point on the Site log or directly in sinex format for the DORIS network at ftp://ftp.cls.fr/pub/ids/stations/itrf2000_doris.snx.
See also the complete ITRF2000 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: Toulouse (Alcatel), Rothera (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

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.

 

Description

The call for participation and the description of the campaign can be found in the DORIS mail n°171 . To begin with, June 2001 has been adopted as a test period.
 

Contributors

A list of the current and future contributions to this campaign may be consulted.
 

Where and what are the DORIS data available?

The DORIS data are stored and distributed by the IDS Data Centers. For a quick view of the history data set for each satellite see the catalog.
 

What is the DORIS data observation?

If you look for a brief description of the Doppler measurement with its basic equation see this document.
 

How to deliver the solutions?

The sinex format solution for the stations coordinates (possibly other estimated parameters: EOP,...) should be deposited on the anonymous FTP site (FTP ftp.cls.fr directory /depot/ids). Note that the repertory contains can't be listed.
Note also that this is a temporary situation, as soon as a naming convention for the solutions is defined, the solutions is delivered directly to the Data Centers. So all contributors will be able to get them.
 

Contacts

You've got a for the Stations Coordinates Campaign and a contact for the IDS analysis coordination.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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