Description

This topic is dedicated to the ASPRO data model describing both the interferometer (stations, instruments, configuration) and an observation using an interferometer configuration with user parameters.

Interferometer

The interferometer is spread in two parts : a description with all possible elements (stations, delay lines, pops, switchyard, instruments ...) and one or more configurations to limit the real possibilities with these elements (instruments with their baselines ...).

Interferometer description

The interferometer description has the following elements :

• observatory position
• list of Telescopes (diameter / adaptiveOptics TBC)
• list of Stations (relative Position / associated Telescope / fixed offset / horizon profile)
• list of channels / beams
• list of delay lines (maximum throw)
• switchyard (fixed delay per station / delay line couple)
• pops (fixed delay per station / pop couple) : TBC
• list of instruments with their modes (wave length range)

Interferometer configurations

For now, the configurations are really useful to model the VLTI restrictions associated to an ESO Call for Proposal Period like the list of allowed baselines per instrument.

The other interferometer have only one configuration listing all possible baselines per instrument.

Observation

The observation is defined an the observation setting with :

• when : date
• interferometer / instrument with the chosen stations
• list of targets
• other parameters : TBC

TODO : define a model for the observability data : time intervals (sun & target) from the current class model (java only)

Data Model Xml Schema

The current data model is written as an XML schema and is provided below :

Current Version : 19 Nov. 2009 :

• AsproOIModel.xsd: Xml schema for the data model

Sample documents

The following documents illustrate two interferometer description for the VLTI and the CHARA interferometers :

• VLTI.xml: VLTI description

• CHARA.xml: CHARA description

-- LaurentBourges - 18 Nov 2009