Observation simulation: What we decided

1. Observation simulation: What we decided • Study O1 (Livetime/pointing simulator) and O2 (High-level observation simulator) • Decide to evaluate in detail by building a trial example: between U. Washington and Perugia, we have >2 FTE. • Something is needed soon for other tools • Validate use of Gaudi structure • Allow refinement of requirements • Many elements already exist in the current simulation • Gino already has a model, code for several elements • We think it can be implemented in the Gaudi framework by the end of summer.

2. Work to do • FITS service: wrapper around the FITSIO package – Sandhia and Heather • Orbit model: verify current model, perhaps enhance • easy to maintain independent versions if implement as service • Pointing mode: need to separate from orbit. Also SAA. • Sources: current scheme is adequate to stand in for U7. New sources to put into library • Galactic diffuse (Perugia, from FITS table) • EGRET catalog + extensibility • Pointing history • Generate output summary like D2 table (UW) • Fast simulation • use PSF, Aeff model to adjust energy, direction. (Perugia has) • create D1-like table

3. Observation Simulation Breakout Session • Review use cases and requirements summaries • Deficiencies in the analysis environment? • Discuss open issues, assess existing software • Testing requirements • Estimate development requirements • FTEs & time, including for evaluating open issues, testing, documentation, by tool or database • factor in software that can be reused • Development support available • Development order, or priorities anyway • Deliverables from conveners • At wrapup session on Friday: Verbal summary of deliberations – the highlights • Shortly thereafter (next week, to SSC-LAT working group): Written version with details