1. C osmic R Ay T elescope for the E ffects of R adiation CRaTER Pre-Environmental Review (I-PER) Spacecraft I&T Mike Golightly September 10-11, 2008

2. C osmic R Ay T elescope for the E ffects of R adiation I&T Support CRaTER team will retain the expertise necessary to address any issues that arise during I&T, launch, and initial operations: –Digital electronics, spacecraft interfaces, instrument simulator, embedded software: MIT/B. Goeke, D. Gordon –Analog electronics: Aerospace Corp/B. Crain –MOC-CRaTER SOC interface: MIT/P. Ford, BU/E. Wilson, BU/D. Bradford –Assembly Q&A, safety: MIT/B. Klatt

3. C osmic R Ay T elescope for the E ffects of R adiation I&T Support Support during I&T activities at Goddard and KSC –Send the minimal number of team members as possible –System experts remain on-call at home institutions to trouble-shoot problems Basis for I&T support strategy –Instrument and its operation are extremely simple and straightforward –Anticipate subset of instrument data available in real-time via TCP/IP Secondary Science & Housekeeping data –verified to work between GSFC and MIT/B. Goeke –Primary Science data will only be available as files after downloading from spacecraft at conclusion of test files can be emailed (or uploaded) to CRaTER support team for immediate analysis –unverified

4. C osmic R Ay T elescope for the E ffects of R adiation I&T Support Basis for I&T support strategy (cont) –No mechanical systems; no capability to access instrument’s internal components without compromising unit’s integrity –Difficult to assess loss of detectors or changes to instrument’s gain/resolution without exposing instrument to a radiation source (not feasible during most I&T activities) –GSFC/R. Sanidad trained on instrument operations –Engineering Model located at MIT can be used to replicate and/or diagnose instrument responses/functionality observed during I&T

5. C osmic R Ay T elescope for the E ffects of R adiation Simulators for I&T Support Electrical simulator –Delivered to GSFC (Jun 2006) –Verified R/T data flow from Goddard to MIT for housekeeping and secondary science packets –First instrument electrical simulator check at Goddard in December 2006—no problems Mass simulator –Delivered to GSFC (Jan 2007) CRaTER Engineering Model (EM) –EM unit located at Boston University CRaTER Lab –Unit hardware/software essentially identical to flight unit –1553↔TCP/IP –Unit can be used to replicate commands ands instrument functionality

6. C osmic R Ay T elescope for the E ffects of R adiation I&T Tests Completed Thermal blanket fit check (in work) –thermal blanket template received from GSFC (Jul 2007) template used to locate posts for blanket attach