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THEMIS launch meeting Cape Canaveral Feb. 13-14, 2007

AMDA A utomated M utiple D ataset A nalysis : application to data simultaneously obtained onboard THEMIS, CLUSTER and other missions. C. Jacquey, V. Génot, E. Budnik, R. Hitier, M. Bouchemit CDPP/CESR, Toulouse, France. jacquey@cesr.fr http://cdpp.cesr.fr/.

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THEMIS launch meeting Cape Canaveral Feb. 13-14, 2007

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  1. AMDAAutomated Mutiple Dataset Analysis:application to data simultaneously obtained onboard THEMIS, CLUSTER and other missions. C. Jacquey, V. Génot, E. Budnik, R. Hitier, M. Bouchemit CDPP/CESR, Toulouse, France jacquey@cesr.fr http://cdpp.cesr.fr/ THEMIS launch meeting Cape Canaveral Feb. 13-14, 2007

  2. Abstract AMDA (Automated Multi-Dataset Analysis) is a service developed at CDPP. AMDA is a suite of integrated tools allowing to perform massive scientific processing of the content of multi-datasets in automated or semi-automated ways. This service is built for working with a local database or (via web-services) distant data sources as well. The functionalities offered in AMDA include (i) user edited visualization browse, (ii) semi-automated event search (visual identification), (iii) automated event search (based on user edited mathematical criteria applied to the content of the data), (iv) data extraction, (v) user edited parameter computation and (vi) access to data stored in distant sites. In this paper, we present AMDA, its functionalities and results obtained in studies based on the use of AMDA. The CDPP (Centre de Données de Physique des Plasmas) is the french data center for solar system plasma data. The CDPP has been created both CNRS and CNES in 1998 and is hosted at CESR (Centre d’Etudes Spatiales des Rayonnements), Toulouse, France. Primary objectives of CDPP is to (i) assure long term preservation of data obtained with french contribution, (ii) to provide technical and scientific services and (iii) to participate to the development of interoperability and virtual observatories.

  3. THEMIS at CESR and CDPP CL: server for interactive detailed visualisation and analysis, high resolution data, on flight calibration, high level products of data, user defined parameter or visualisation, … (see poster of E. Penou and J.A. Sauvaud, this session) CESR Cluster, DoubleStar, Ace, …, database CL Mirror base of the THEMIS space data THEMIS database: K-parameter AMDA: server for automated, semi-automated or simply manual data analysis. AMDA works on a k-parameter database and provides facilities for visualisation, data extraction, semi-automated/automated event or signature search/ characterisation. AMDA produces event list and catalogs. AMDA CDPP base of standardised data CDPP AMDA is developed for being interoperant with other data centers or services. For now, AMDA implemented the web-services offered by the CDAWeb. This allows AMDA to acceess to the CDAWeb database in a way transparent for the user. Distant data and services: CDAWeb, CAA, GAIA, SSCweb, Darts, …

  4. AMDA (Automated Mutiple Dataset Analysis ): the goals Multiple Dataset: the study of the (multi-scale) dynamics of plasma objects requires to perform the integrated analysis of multi-point and multi-instrument data • Automated (or semi-automated) Analysis: help for • Search, characterisation, classification of events • Extensive exploitation of the vast database (statistics) • “historical” studies (example: through solar cycles) • Building catalogues • Building virtual constellations AMDA, fact sheet • Now, very first prototype. Operational version v1.0 sould be openend in march. •Prototyping development. • Built on an existing data system (DD_System, A. Fedorov) • Built in IDL, C, FORTRAN, Javascript • Works on standardised local database through universal requests •Implementation of the CDAWeb web-services • Forum for user feedback • Already in use for scientific studies • Output: data and derived parameter files, plots, event lists, catalogues. Underway: • models (Tsyganenko, Shock, MP, NS, …) implementation • Interface development for running AMDA on other databases

  5. Schematic description of the envisioned system Distant database CDAWeb SPDF Distant database CASSINI MAPSKP Distant services Distant services Web- services Local databases External interface Virtual objects User interface System interface Services Virtual objects USER AMDA

  6. Local database. Themis and DoubleStar to be added

  7. AMDA/workspace: user defined parameter computation

  8. AMDA/plot: visualisation and semi-automated event/signature search (1)

  9. AMDA/plot: visualisation and semi-automated event/signature search (2)

  10. AMDA/download: data extraction

  11. AMDA/Conditional search

  12. Example: Looking for possible X-line with a pair of spacecraft Output: event list + gap list In XML format.Other formats are also envisioned <?xml version="1.0" ?> - <TimeTable Name="essai1"> <Created>Sun Feb 11 12:21:25 2007</Created> - <Chain> <![CDATA[ B_C1(2)*B_C3(2)<0&MOM_C1(1)*MOM_C3(1)<0 ]]> </Chain> <Source>AMDA Search</Source> - <Interval> <Start>2001-08-01T23:50:00</Start> <Stop>2001-08-02T00:00:00</Stop> </Interval> - <Interval> <Start>2001-08-02T00:05:00</Start> <Stop>2001-08-02T00:30:00</Stop> </Interval> - <Interval> <Start>2001-08-02T02:00:00</Start> <Stop>2001-08-02T02:15:00</Stop> </Interval> - <Interval> <Start>2001-08-02T02:20:00</Start> <Stop>2001-08-02T02:40:00</Stop> </Interval> BZ1 * BZ2 < 0 AND VX1 * VX2 < 0

  13. AMDA/implementation of the CDAWeb web-services

  14. Conclusion • AMDA allows to attack standardised data bases either massively or case by case • Computation of user defined parameters from multi-datasets • Descriptive model computation (Tsyganenko, …) • Multi-dataset visualisation • Data and computed parameter extraction • CDAWeb web-services • Event or signature search, characterisation and classification. Event list creation and managment: • in an interactive way, by visual identification • In an automated way, by editing mathetical criteria on the content of the data • Perspectives for exchanging event lists with other services (SPDF, CDAWeb, GAIA, CAA, DARTS, …)? • AMDA for Themis • Integrated K-parameter database: Themis (space data), Cluster, DoubleStar, Geotail, … The level (SP or PP parameters) of Cluster-DoubleStar data depends on co-I/non co-I • Transparent connection to CDAWeb… and others? • Providing event list for CL… and others?

  15. Some examples: • AMDA + CL (or other softwares): • Users produces time-tables on AMDA based on their own defined criteria applied on the content of the data they selected • Time-tables sent to CL • Users browse user-defined plots on the periods of the time-tables and then run detailed analysis on CL • SSCWeb (or DARTS) + AMDA: • Users produces time-tables on SSCWeb based on criteria applied on the orbitography and conjonctions. • Time-tables sent to AMDA • Users produces secondary time-tables on AMDA based on criteria applied on the content of the data for the periods of SSCWeb time-tables • Then, these secondary time-tables are exported to detailed analysis softwares or are used inside AMDA for building catalogues, or …

  16. Demo Derived parameters computation (calculator) Automated and semi-automated search Sub-dataset conditional extraction Distant access to complementary data

  17. An example: search of the events when the cross-tail current is “encircled” by CLUSTER 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

  18. CL Software for detailed analysis of multi-datasets in space physics Developed by Emmanuel Penou (penou@cesr.fr) Scientific specifications by Jean-André Sauvaud THEMIS SWG meeting SSL Nov. 15-16, 2006

  19. CL: fact sheet Multi-missions (CLUSTER, VEX, MEX, DEMETER, ACE, STEREO, …) and multi-instrument (B,E, particles, Waves) SOLARIS, LINUX, WINDOWS IDL and C Visualisation Computation of derived products Export data (CDF, ASCII) (Conditionnal search) Calibration files L1 files L2 files Processing (Internal format CDF, ASCII)

  20. Demo • Predefined plots • Building, editing, manipulating plots • External files. CDF files • High level products: -distribution function -spectrograms in PA, 1/V -partial moments • Remote running

  21. Conclusion: what can be done at CESR and CDPP for the THEMIS community? Mirror site for space THEMIS data Distributing CL, but limited user help Remote running of CL on dedicated machine(s) AMDA for event search, catalogue building, statistics on “simple” THEMIS and complementary data Coupling AMDA event search and CL (and any other softwares or system: CDAWeb, UCB, …) by exporting time-tables

  22. Contacts CL: penou@cesr.fr AMDA: jacquey@cesr.fr http://cdpp.cesr.fr/ forum for feedback on the CDPP services (in french for now)

  23. Example: event search Old fashion: “paper” search ISEE MAG IMP8 PLA ISEE- electron AE, AL IMP8 MAG IMP-8 AE, AL ISEE-data Current fashion: web CDAWeb SPDF UCLA CAA CDPP And others Event search takes time and energy

  24. AMDA, fact sheet • Now, very first prototype (construction started in June 2006 after kind of phase-A) • Built on an existing data system (DD_System, A. Fedorov) • Built in IDL, C, FORTRAN, Javascript • Works on standardised and “simple” data, NetCDF •Includes models (Tsyganenko, Shock, MP, NS, …) •Attempt for using web-services of CDAWeb and the up-coming VxOs • Forum for user feedback • Already in use for scientific studies

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