GLAST The Gamma-ray Large Area Space Telescope Mission Status DC2 Kickoff 1 March 2006 S. Ritz

1. Gamma-ray Large Area Space Telescope GLAST The Gamma-ray Large Area Space Telescope Mission Status DC2 Kickoff 1 March 2006 S. Ritz

2. Topics NASA budget and GLAST Context GBM Spacecraft Launch vehicle Ground system GLAST Science Support Center (GSSC) Education/Public Outreach GLAST Users Committee (GUC) Summary

3. Context: GLAST Observatory Two GLAST instruments: LAT: 20 MeV – >300 GeV GBM: 10 keV – 25 MeV Spacecraft General Dynamics C4 Systems (Spectrum Astro)

4. GLAST MISSION ELEMENTS GLAST MISSION ELEMENTS Large Area Telescope & GBM m • sec GPS • - • Telemetry 1 kbps GLAST Spacecraft • TDRSS SN S & Ku DELTA 7920H • • S - - • GN • LAT Instrument Science Operations Center White Sands Schedules Mission Operations Center (MOC) GLAST Science Support Center HEASARC GSFC Schedules GRB Coordinates Network GBM Instrument Operations Center Alerts Data, Command Loads

5. GBM All hardware complete. Detectors integrated at MSFC/NSSTC. Nagging problem of DPU EMI with GPS appears to be resolved. Power box and DPU in currently in rework, back soon. Flight software is in final cleanup. Software for the Burst Alert Processor (BAP) is in the early stages (speed versus accuracy trades). GBM delivery to Spectrum Astro in late June.

6. Spacecraft Status • Flight structure built and qualified. • Harness integrated. • Integration of components into spacecraft ongoing. • Solar array and power system components work on track. • C&DH (control and data handling) system schedule a challenge. • Propulsion system complete, undergoing testing. • Replacement of critical release mechanisms that had recent test failures on other programs; used for solar arrays and Ku-band antenna. Assessing schedule impacts.

7. Launch Vehicle • Procurement (ATP) started! • Mission Integrated Working Group (MIWG) meetings. • GLAST Launch site support planning ongoing. • Mission plans to use excess lift capacity to reduce orbit inclination. • Reduces backgrounds and time in SAA slightly • Reduces false trigger rate in GBM due to “electron precipitation” events • Best guess: 25.3º. Stay tuned. • Issue of excess nozzle gimbal motions in previous flights being worked. Currently a hold on Delta II Heavy launches. Mars Rover “Opportunity” on the launch pad Delta II - Heavy

8. Ground System • Coordinated activity ramping up across all the elements. Sets of readiness tests, E2E tests and simulations planned (some complete). • Regular “GOWG” (GLAST Operations Working Group) meetings. • Mission Operations Center (MOC) facility integration proceeding at GSFC. • Held Operations Technical Interchange Meeting at SLAC in Sept and at Spectrum Astro in January. • Mission Operations Review (MOR) March 15-16.

9. GLAST Science Support Center (GSSC) • The GSSC has moved from design to implementation: • Data Archive • The server for LAT photons and events is ready and in use for DC2. • Additional data products are be served via the website. • Operations • The scheduling tool (TAKO) is complete. • Software to support ToOs and to process observing timelines is under development. • User Support • Proposers for the GI program will have a series of software tools related to the SAE. • Timelines, exposure and count maps, and various reports will be posted on the GSSC website. • The GSSC is actively involved in the Science Analysis Environment (SAE), the definition of the data products, and the writing of documentation and workbooks.

10. GLAST E/PO Program • Sonoma State University leads GLAST E/PO (Lynn Cominsky, et al) • Use the observations and scientific discoveries of the GLAST mission to improve the understanding and utilization of science and mathematics concepts for grades 9-12. • collaborates with the OSS SEU Education Forum, other SEU missions, and other partners in the OSS Support Network. • Web based materials and printed materials (now in the hands of over 10,000 teachers) • Educator training • Educator Ambassador program (over 3000 teachers trained in 20 states) • workshops for AAVSO and at national, regional meetings • minority outreach workshops • GLAST Telescope Network: partners scientists with high-school students and amateurs. • PBS Nova show on High Energy Astronomy and Black Holes (Tom Lucas) in progress, airs in September.

11. GLAST Users Committee (GUC) • Growing community eagerly anticipating GLAST data! • Advises GLAST Project and NASA on NASA-funded Guest Investigator Program. • Next F2F meeting at Goddard, 8-9 May. • Expanding international participation. • See http://glast.gsfc.nasa.gov/ssc/resources/guc/

12. Summary: THE LOOK AHEAD • All elements of the GLAST mission have largely completed the fabrication phase and are well into integration. • LAT, GBM, and spacecraft assembly complete by mid 2006. • Delivery of the instruments for observatory integration spring/summer 2006. • Observatory integration and test summer 2006 through summer CY07. • Major conference, first GLAST Symposium, being planned for February 2007 at Stanford. International Organizing Committee formed. • Launch in September 2007… Science Operations begin within 60 days. Fabrication Instr & S/C I&T Launch Observatory I&T 2005 2006 2007