1. Planning for the ATA David DeBoer OWG AOC March 13, 2006

3. Categories: Fixed Scope to Minimize Consumables –Electricity –Oil –Fuses Direct maintenance –Parts –Direct labor Maintenance overhead –Labor (other) –Ordering/tracking/receiving Site/Administration –Lease –Custodial –Director –Site Maintenance design/ construction administration

4. Categories: Flexible Scope Development Observing –Observer –Software support Science Products –People to have reasons to use the telescope and write papers

5. Considerations Efficiency + commodity to minimize consumables Share labor between as many categories as possible (versatile and willing staff) Field replaceable units easily ID’ed and replaced Expected downtime (not 100% of the array 100% of time, fix in normal operating hours) Automated scheduler + students for Observing “Specific” science, compact array Not a “facility” instrument Commensal observing yields high science return per unit clock time (ideally per unit OH time?)

6. Flexibility Beam former generates 16 dual-pol pencil beams anywhere in the sky (100 MHz) Correlator images the entire FoV (200 MHz) @ ~20,000 pixels NULL

7. SETI Targeted Search stars/PFOV stars

8. Targeted Search GHz N*N* max [GHz] D max [pc] N civ Weather radar at D max AOPR at D max 10 3 0.53010 8 90.006 10 4 1.56510 7 400.03 10 5 4.814010 6 2000.12 10 6 15.330010 5 9000.6

9. Near Sky Survey For 1 beam 20 AOPR (1 SKA) at 1.5 kpc 10 8 stars  1000 civilizations

10. Far Sky Survey For 1 beam 700 APR at 10.5 kpc