1. 1 OEAW Contribution to ECLAT R. Nakamura, W. Baumjohann, M. Volwerk Institut fu ̈ r Weltraumforschung der Österreichischen Akademie der Wissenschaften

2. ECLAT IWF lead work packages  Cluster in-situ data products  WP 210 Cluster event identification  WP 220 Cluster region and boundary identification  WP 230 Event finding and visualization tool  210 Deliverables (due September 2013)  Cluster event list and quick-look data products (1plot/event)  Event time-interval & Characteristic parameters: spatial gradient, average plasma  220 Deliverables (due June 2012)  Cluster region and boundary list: tabulated output  Region and boundary time-interval, characteristic parameters: e.g. spatial gradient, average plasma  230 Deliverables (due September 2013)  Documentation regarding description of identification methods  Source code of search algorithm of the boundary/region/events

3. Objectives  Develop a list of plasma boundaries and regions (WP 220) and science events (WP210) from regions where major energy conversion/transport processes take place and important for the system level sciences in the night side magnetosphere  Input: CAA Cluster data from all available periods (2001-2009)  WP220: Boundary/regions :  magnetotail current sheet, plasma sheet, lobe/plasma sheet boundary  WP210: In-situ science events:  Reconnection, Plasma jets, Dipolarizations, Current sheet oscillation  Quick look plot (1plot/events) with merged data from other ECLAT products

4. WP 210: Cluster event identification Objectives  Develop a comprehensive list and parameter data base of in-situ science events using CAA from all available periods (2001-2009) as input.  Science events:  Reconnection  Plasma jets  Dipolarization  Current sheet oscillation  Event catalogues containing representative parameters and graphics are provided;  The data product will be ingested to CAA

5. Description of work  Selection of the target sets of plasma processes  Preparation of input CAA Cluster data for search algorithm  Executing search algorithm with several iteration and creating the event time list (Code development: WP230)  Creation of parameter data base for the event  Creation of graphical output using representative parameters  Ingestion of data product into CAA (IRFU task) Deliverables: Cluster event list and quick-look data products  Event time-interval (tabulated output)  Characteristic parameters: spatial gradient, average plasma  Event plot 1plot/event WP 210: Cluster event identification

6. WP 210: Event search - Dipolarization Attempt for automatic identification 3 min-sliding window Plasma sheet: β ≥ 0.5, Θmax > 45° Rapid dipolarization: Vx,perp > 150 km/s, ΔΘ > 10°, ΔBz > 4nT Near center : |Bx| ≤ 5nT |Ygsm| ≤ 12 RE Applied to PP data from 2001- 2007 (D. Schmid, MS thesis)

7. WP 210: Event search - Dipolarization  107 events (2001-2007)  This criteria was chosen to identify rapid & thin (non-MHD) scale dipolarization front.  Need to optimize the selection criteria for ECLAT relevant science

8. WP 210: Event search - Reconnection Attempt for automatic identification Spin resolution data (PP) Strong out flow in plasma sheet: Vx > 300 km/s, beta > 2 X- line signatures (visual check so far): Contain periods with flow reversal & BzVx >0 Data from 2001-2005 (R. Rott, MS thesis)

9. WP 210: Event search - Reconnection  50 intervals  Event selection depends on process time-scale of interest  Large scale tail dynamics ?  Thin current sheet dynamics?

10. WP 220: Cluster region/boundary identification Objectives  Develop a list of plasma boundaries and regions from the night side magnetosphere using CAA Cluster data from all available periods (2001-2009) as input  The boundary/regions to be identified are those where major energy conversion/transport processes take place and important regions for the system level sciences: magnetotail current sheet, plasma sheet, lobe/plasma sheet boundary  Produce representative parameters such as spatial/temporal scales, orientation, and intensities  The data product will be ingested to CAA

11. Description of work  Selection of the target region/boundary regions, in consultation with potential CAA boundary identification efforts from FMI  Preparation of input CAA Cluster data for search algorithm  Executing search algorithm with several iteration and creating the list of the interval (Code development WP0230)  Creation of representative parameter data base for the event  Ingestion of data product into CAA (IRFU task) Deliverables: Cluster region and boundary list  Region and boundary time-interval (tabulated output)  Characteristic parameters: e.g. spatial gradient, average plasma WP 220: Cluster region/boundary identification

12. Current sheet & plasma sheet & psbl  Some examples from previous IWF activities  Runov data base (Runov et al., 2006, Ann. Geophys.)  Rapid current sheet crossing events for 2001,2004  Overall tail crossings for cluster-ground base workshops for 2001, 2002, 2005, 2006  FMI region identification (presentation by T. Laitinen) Relevant parameters  Inputs: CAA fgm (spin & 5Hz), cis moments  Products using CAA data: curlometer, beta, Harris current sheet fit  Characteristic parameters: orientation, average numbers, scales  Reference: ground-based, model, IMF/solar wind conditions

13. WP 230: Event finding & visualization tool Objectives  Develop algorithms for searching in-situ science events (WP210) and plasma boundary/regions (WP220)  Visualization tool for the in-situ science for graphical output (quick-look) of the in-situ science events (WP 210): 1plot/events.  Documentation describing the algorithms as well as the original code ingested to CAA to allow public access Description of work  Search algorithm of the boundary/region identification development, testing and refining the search algorithm by iteration (WP220)  Search algorithm of the event identification development, testing and refining the search algorithm by (WP210)  Development of the visualization tool  Documentation of the algorithms  Ingestion of the algorithm and code to CAA (IRFU Task) Deliverables: Boundary and event identification: report and software  Documentation regarding description of identification methods  Source code of search algorithm of the boundary/region/events

14. Quick-Look plot 1 plot/event Cluster parameters (4sc-profile) Multi-spacecraft parameters Environment  solar wind, IMF  GB data  …. Orbit, configuration Model ?

15. Status  ECLAT RTD scientist: P. Boakes starting from 1. April, 2011  Preliminary works with PP data for investigating search methods for dipolarization & reconnection by two Master students (R. Rott and D. Schmid)  Coordination for boundary identification with FMI  Discussions on optimization of parameters for the tables and plots  Development of boundary & region identification algorithm