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Gaia Data Access
As announced and discussed at the GREAT Plenary Meeting PM4 in Brussels (21-23 June 2011) - the ESA Gaia project and Gaia Science Team are now in the process of refining the requirements for the access to the Gaia Data Products.
From this the Gaia DPAC will be implementing the systems required to give access to the rich Gaia data products, through the Gaia Archive.
These pages provide public information as to the nature of Gaia data, the planning and development of the Gaia archive and access systems, and give a chance for the community to participate in the development process, through for instance providing example science scenarios for how they might wish to utilise and access the data.
Gaia Data Access - 3rd Call for User Scenarios
With the release date of Gaia-DR1 Wed 14 Sept 2016, the community is asked to review the current set of Data Access Scenarios (see below), and submit new data access scenarios, which will be considered for future implementation to support the second half 2017 release of Gaia-DR2. This third call is open from July - December 2016. Please see below for details as to how to add new scenarios.
Gaia Data Access - 2nd Call for User Scenarios
With the launch of Gaia in Dec 2013, and In Orbit Calibration Review mid Jul 2014, the community is asked to review the current set of Data Access Scenarios (see below), and submit new data access scenarios, which will be considered for future implementation. This second call is open from July - December 2014. Please see below for details as to how to add new scenarios.
Gaia Science Performance
The pre-launch anticipated science performance (based on the outcome of the Apr 2011 Gaia Mission Critical Design Review) - can be found on the Gaia Science Performance pages.
Also - see the Science Data Release talks from Prusti, Brown, de Bruijne and O'Mullane at the GREAT PM meeting: GreatMeet-20110621
Data Access Scenarios
The following topic areas are where you, the community, can describe how you might wish to access the Gaia data. At this stage, the idea is to encapsulate usage examples, to concentrate on the what is needed, rather than go into details of how that might be done. Thus, we are not necessarily looking for detailed exampled SQL queries for instance. But rather more descriptive examples.
When adding your example, please note that you can be as vague or explicit as you wish. If you have a very detailed suggestions (e.g. of the form 'find all stars showing [X/H] > 1.0 and with G variability >10%') then please do suggest. Likewise, if you query is more general (e.g. of the form 'find all objects with high proper motion') then, again, please add.
For any example that you enter - please indicate in broad terms whether the response for the data/ archive system should be 'instant' or could be one which takes a while to complete. You can also indicate your general area of science expertise if you wish.
The following topic areas (and note that you have to be logged in to the wiki to read and write to the pages below - if you are not logged in then you will only be able to read the page) are opening suggestions, but if there is demand, other areas will be opened up. See below as to how to register if you haven't already done so.
 GDAS-BR: Browsing and qualitative exploration: including simple usages of first-time users
 GDAS-ED: Early data access: thus access to data from the first releases
 GDAS-PR: Public outreach for the non-astronomer/non-scientist
 = number of cases submitted as of 2013-08-22
The Gaia Science Team encourage the GREAT working groups to suggest specific example usage scenarios.
The above input will be utilised in ensuring that the design of the Gaia archive is able to best meet the expectations of the user community.
Feedback on Gaia Data Access Proposals
The community is invited to provide feedback and comments on the evolving plans for the shape and content of the Gaia Data Releases.
To comment on the June 2012 release of the 'Gaia data access scenarios summary', please visit the Scenarios Feedback page.
Gaia Archive Preparation (GAP)
The GAP are currently making preliminary preparations in readiness for the design and construction of the Gaia Data Access and Archive System. The work is organised around a number of work areas:
- Management and Coordination - the Plan and WBS etc. (O'Mullane)
- Requirements Gathering - Consolidate requirements (Malapert)
- Architecture and Technical Development - Software and Hardware for the Archive (O'Mullane)
- Data Validation and Verification - Global catalogue validation (Arenou,Di Matteo )
- Data Documentation - Documentation of the Archive and contents (Van Leuwen)
- Operations and Support - how will the archive run. (Mercier)
- Outreach and academics - how to make the Gaia achievements reach the general public (Luri)
The GAP wiki pages are accessible to members of the DPAC GAP.
Gaia DPAC CU9
The further development of the Gaia data access system is now being taken forward within CU9 of the Gaia DPAC. Full details can be found at http://rssd.esa.int/gaia/dpac
A note on registering for the wiki:
Any user can visit these wiki pages and view them. However to actually contribute and edit the pages - you will first have to get your self a username and login to the wiki.
If you are not logged in you will see that the there is a 'login' link at the top left of the page. Once you have logged in you will see your name there and also that most wiki pages change from being immutable to having options for editing.
The process of getting a login needs to be done once. Click the login button and then the link to create a user account. When doing this - best if you can create a username which is the wikiword version of your name - thus JoBloggs. The final step is one that the GREAT admin have to do - and that is add your name to the GREAT ParticipantsGroup - once this is done you then have the relevant permissions to allow editing.