GLAST Large Area Telescope Monthly Mission Review LAT Flight Software Status February 13, 2008

1. Gamma-ray Large Area Space Telescope GLAST Large Area Telescope Monthly Mission Review LAT Flight Software Status February 13, 2008 Jana Thayer Stanford Linear Accelerator Center GLAST Monthly FSW

2. FSW Status • B1-0-7 successfully uploaded to LAT on 2/10 • Regression test successful • Uploaded VXW enables machine checks for uncorrectable memory errors and sets SDRAM refresh rate to 7.5 us • B1-0-8 (one package modified) will be ready for upload on 2/19 • B1-0-8 is launch-ready • Ground software • DFI, Q-packages, and CMX being finalized prior to L-60 software freeze • B2-0-0 planning underway • No work has been started GLAST Monthly FSW

3. B1-0-8 • B1-0-8 contains one FSW change, an issue identified during the GRB Handling test: • FSW-1052: Change LAT FSW (LIM) to send SACSLEWREQUEST telecommand to SC with RA/DEC in units of degrees instead of arcmin • LAT-SC ICD did not specify the units for this LAT to SC telecommand: will be modified to specify degrees • LAT-GBM ICD specifies arcmin for all telecommands exchanged between LAT and GBM: no change - continue to use arcmins • LAT and GBM alert telemetry report in arcmins: no change - continue to report in arcmins • No interfaces other than the SACSLEWREQUEST telecommand are affected by this change. GLAST Monthly FSW

4. B1-0-8 cont’d • B1-0-8 development schedule: • Development underway; completion estimated by 2/14 • Roll B1-0-8 on 2/15 • Regression testing on testbed: 2/16 - 2/19 • Perform targeted tests to verify the LIM change • Repeat FQT tests, emphasis on LIM modes and GRB messaging • B1-0-8 ready for upload to LAT by 2/19 • B1-0-8 upload to LAT and regression: • B1-0-8 will upload one 33 kB file to one processor (the SIU) • Recommend uploading at same time as LAT configuration upload to save time switching from SIU-R to SIU-P • Regression test (on LAT): • Piggyback on LAT configuration upload regression • Run repeat of GRB handling test to verify change GLAST Monthly FSW

5. FSW Ground software • In anticipation of Mar 17 software freeze, release all necessary FSW ground software tools • Development is underway in three major areas: • CMX • The CMX tool is now capable of handling code “offshoots” • Allows FSW to maintain the B1-0-8 branch while developing on a B2-0-0 development branch • FSW will make no attempt to merge the two branches at a later date; that’s why we call them offshoots • DFI • Make filter statistics and filter summary data accessible to offline processing • This information is vital to offline, but will not be delivered until ~ 10 days prior to freeze • Various Q packages • Representation of low-rate science counter data • Tools for LATC verification and cracking LATC dumps GLAST Monthly FSW

6. Other • Reboots • See Pat Hascall’s presentation • FSW is measuring the effect of running with only one EPU • FSW is helping to develop a strategy for diagnosing and recovering from reboots on orbit • B2-0-0 • Scope of work • ~35 items to work on in various packages • Estimate ~ 3 months effort by FSW group • Roll out of these items will be staged to allow stress testing on Testbed prior to installation on LAT • Work on B2-0-0 will happen in a development environment separate from B1-0-8 • B2-0-0 items will be prioritized based on availability of resources within FSW • FSW will consult with ISOC and science groups to verify completeness of list, prioritization, and need • Once LAT has agreed to changes, a roll-out schedule will be presented to a broader audience GLAST Monthly FSW

7. Backup GLAST Monthly FSW

8. B2-0-0 Preliminary GLAST Monthly FSW

9. B2-0-0 Preliminary GLAST Monthly FSW

10. B2-0-0 Preliminary GLAST Monthly FSW