1. 3rd September 2006SKADS Workshop 2006Mike Garrett 1 DS2 - Science & Data Simulations Mike Garrett (JIVE)

2. 3rd September 2006SKADS Workshop 2006Mike Garrett 2 DS2 - Science & Data Simulations Context/Background: -DS2 ~ Major Activity within SKADS (1.4 MEuro EC funding) -Split into two separate but inter-related Tasks: -DS2-T1: Science Simulations (S. Rawlings, M. Jarvis - Oxford) -DS2-T2: Astronomical Data & Array Simulations (M. Garrett, C. Reynolds - JIVE) -Case developed in 2003 (JBO, Nancay, Madrid, Florence, Schiphol etc) -Proposal submitted early 2004; SKADS Project start July 2005 -DS2 start in spring 2006

3. 3rd September 2006SKADS Workshop 2006Mike Garrett 3 DS2 & SKADS Technical Programme Original goals of DS2 complimentary to SKADS Technical Developments: –EMBRACE (European Multi-beam Radio Astronomy Concept) - DS5  Low-frequency bias in the original DS2 proposal and description of work European astronomers quick to recognise potential of Aperture Array: 1.“All sky” coverage, extremely wide-field of view 2.Frequency coverage (0.3 - 1.4 GHz) 3.Independently steerable, multiple fields-of-view (beams), experimental science…? 4.Transient buffer (data “replay”) capability 5.Instantaneous response to externally triggered events 6.Software telescope (clear upgrade path that follows Moore’s law)

4. 3rd September 2006SKADS Workshop 2006Mike Garrett 4 DS2 - 2006 SKA Reference Design includes both Aperture Array & Smart Dishes: -SKADS DS2-T2 data simulation activity remains focused on EMBRACE Aperture Array, in comparison with other concepts (ATA, xNTD, KAT APERTIF etc) -Other more general goals include - Array Design/Configurations, Imaging & Calibration techniques -Other issues addressed: -Really Long baseline simulations, including Space VLBI (VSOP-2) -Precision Spacecraft Navigation (include. EMBRACE test obsns) -High frequency -Cylinders (BEST) -SKADS DS2-T1 provides input to DS2-T2 (e.g. sky models) but is quite general in its scope and well integrated with International SWG.

5. 3rd September 2006SKADS Workshop 2006Mike Garrett 5 Summary DS2 slow start, but catching up rapidly… (see Rawlings & Reynolds) Focus remains on SKADS Aperture Array Technology for data simulations Other studies (e.g. Science, Array Configurations, Imaging & Calibration techniques) are quite general. Essential that both DS2-T1 and T2 are fully integrated into International SKA Programme. Time to start thinking of how this effort continues within FP7 Preparatory Studies….