Systems Integration Christopher Bessette Alexander Reich Nicolette Yovanof AERSP 401A 12/11/03
LionSat Nanosatellite Program 12 Universities Competing Launched on STS Launched into LEO Lifetime Expectancy: 6-12 months
LionSat Mission Timeline
Objectives Primary Objectives Secondary Objectives P1: To map the ram and wake plasma structure surrounding a small satellite. P2: To collect data on ionospheric plasma in a variety of geophysically interesting locations in low Earth orbit. P3: To test, on orbit, a miniature RF ion thruster. Secondary Objectives S1: To test IP communications for uplink and downlink to a spacecraft in low Earth orbit.
Mission Requirements Mission Requirements M1. The plasma environment mapping throughout the entire perturbed region (i.e., ram and wake) must be resolved to 30±5 degrees about the satellite spin axis. M2. The electron density and temperature of both the unperturbed and perturbed regions around the nanosatellite must be collected and returned to the ground for a minimum of three separate geophysically meaningful campaigns. M3. The miniature RF ion thruster must demonstrate a minimum of one hour of continuous operation. M4. The miniature RF ion thruster must demonstrate a measurable change in the satellite rotation rate.
Systems Integration is… Interaction between subsystems Interfaces and Integration of subsystems Educational Outreach Overseeing Requirements
Systems Integration Breakdown Member Subsystem Christopher Bessette GNC, Propulsion Alexander Reich Power, Scientific Instruments Anju Thomas C&DH, Communications, Ground Control Nicolette Yovanof Thermal, Structures/LV Interface
Work Completed Requirements Flow Charts Communication Between Subsystems Weekly Progress Reports Safety and Configuration Management Meeting Expedition Educational Outreach SDR Preparation
Subsystem Updates GNC, Structures, Thermal – Up Next! C&DH Communications Power Propulsion Scientific Instruments
Subsystem Design Review January 14-16th, 2004 in Dulles, Virginia Requirements: 2-4 Slides from each Subsystem Preliminary Subsystem Drawings Subsystem Test Plans List of Materials Hardware Basic Plans for Testing
Subsystem Design Review – Systems Integration Compiling All Information From Subsystems Master Flow Charts Project Requirements Subsystem Interaction Hardware Interfaces Help Prepare Posters for Poster Session Miscellaneous Final Preparations
Spring Semester Work SDR Final Plans Review of Comments from SDR Continuous Update of Interfaces and Charts Educational Outreach Preparation for Safety Reviews and Critical Design Review LionSat Transition
Questions? Conclusion LionSat Objectives & Mission Requirements Systems Integration Work Subsystem Design Review Future Work Questions?