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Time Table exchange QSAS / CL / CAA / AMDA CESR, 25/26 feb. 2008

Time Table exchange QSAS / CL / CAA / AMDA CESR, 25/26 feb. 2008. We all use time as an ordering quantity Goals of this meeting 1/ Context - Define time tables : TT - Show the scientific interest of TT exchange (see use case presentation) - See how time is handled in our different systems

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Time Table exchange QSAS / CL / CAA / AMDA CESR, 25/26 feb. 2008

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  1. Time Table exchange QSAS / CL / CAA / AMDA CESR, 25/26 feb. 2008

  2. We all use time as an ordering quantity Goals of this meeting 1/ Context - Define time tables : TT - Show the scientific interest of TT exchange (see use case presentation) - See how time is handled in our different systems 2/ Actions - Define a common TT format - Define an exchange protocole for communication between services / centres / tools - Define TT management tools : merge, intersect, extend, shift (SW) 3/ Perspectives Think beyond time tables : catalogues of statistical parametres (mean, max, min)

  3. Time Table management with AMDA Automated Multi Dataset Analysis cdpp-amda.cesr.fr

  4. What is AMDA ? • objectives • functionalities • How does the information circulate inside AMDA ? • parameters • TT • Communication between centres / services / tools • External data : CDAWeb, MAPSKP • CAA connexion demo

  5. Objectives Ease manipulation of data from heterogeneous origins … Plot Combine Search Download Mission Instrument Resolution Local Remote User owned … for simple browse, building catalogues, performing statistics

  6. Using AMDA Select 1/ Activity 2/ Data 3/ Time frame

  7. The parameter level • A parameter is any time series : • magnetic or electric field vector • particles moments • indices • ... • combinations of the previous •  valid on a given time range •  at a given time resolution •  used for : • - plotting • - searching • - downloading, ... 17/11/1994 31/12/2005 Sampling 4s The file organisation inside the archive is hidden to the user

  8. New parameter contruction 1/2 define time resolution mouse clicks define parameter name supply description

  9. New parameter contruction 2/2 • Parameters from • different missions • different instruments • with different time resolution • may be conbined Save new parameter in user workspace The newly constructed parameter is now an element of the database. It is computed on the fly only when it is needed (virtual object concept).

  10. Tools are implemented : • ‘time shifting’ to account for time lag between instruments, • ‘resampling’ to account for resolution difference between instruments.

  11. The Time Table level an easy way to communicate information between data centres/archives - Time tables, or event lists, are a collection of times when ‘something’ happens or time spans when some conditions are true. - They are usually manually created and managed by scientists for their own need or the one of restricted community. - AMDA enhances the potentialities of these objects by offering a generic tool to create, handle and communicate them between databases/archives and users. These time-tables may be used for : - extracting sub-databases, - executing massive and/or interactive treatments, - creating catalogues, - serving as reference in the community

  12. Create a time table : 1- Conditional Search T/T// > 1 mouse clicks Edit a condition with mathematical operators/functions Define time span or use a time table

  13. An example: search of the events when the cross-tail current is “encircled” by CLUSTER magnetic field magnetic field X coordinate Test: • X1< -10 Re • BX1 * BX2 * BX3 * BX4 > 0 • min([BX1 BX2 BX3 BX4]) < 0 • max([BX1 BX2 BX3 BX4]) > 0 Looking for the time periods when 2 s/c are above the neutral sheet and the 2 other ones are below

  14. Create a time table : 2- Visual Inspection Record intervals of interest by mouse clicks

  15. The time table may be edited in the user workspace

  16. TT format Tables may be exported in VOTable format

  17. VOTable latest release: Version 1.1 - August 11, 2004 VO standard and as such supported by IVOA VOTable is designed as a flexible storage and exchange format for tabular data, with particular emphasis on astronomical tables.

  18. Complex tables (catalogues) may be produced : • with multiple time tags • associated parameters : average, max, min • geographic information • ...

  19. Time table circulation in a multi-archive environment Magnetospheric data KP archive 2 KP archive 2 HR archive 1 HR archive 2 Service 2 Time table - - - - - - AMDA Service 1 Service 3 applying delay Service 4 What were the input conditions ? Solar archive Ionosphere Thermosphere archive What are the consequences ?

  20. Interface for building the external base data tree External Bases User build data tree CDAWeb MAPSKP CDPP …

  21. External data tree Local base • External base user-extract • Parameters are available on the fly which implies : • data downloading (3 days at a time) • format transformation • building the AMDA parameter

  22. Connexion à des bases externes MAPSKP AMDA CDPP System Local Database CDAWeb others

  23. Connexion to CAA

  24. Time Tables at CDAWeb

  25. Conjunction Event Finder   for 1992-2010 http://darts.isas.jaxa.jp/stp/cef/cef.cgi

  26. Architecture d’AMDA

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