The telemetry, tracking and control subsystem provides vital communication to and from the spacecraft TT&C is the only way to observe and to control the spacecraft’s functions and condition from the ground October 29, 2003 Massachusetts Institute of Technology

Spacecraft data processing requires microcomputers and interfaces that are functionally similar to desktop systems However, space systems require: Low power, volume, and mass High reliability and fault tolerance

Autonomy Technologies Fault Detection, Isolation and Recovery Planning & Scheduling Intelligent Data Understanding

Software Engineering Research Laboratory Department of Aeronautics and Astronautics Massachusetts Institute of Technology

Outline Definitions Software design process Design rules Software costing

Space Systems Laboratory Massachusetts Institute of Technology Introduction Introduction Objective : To compare the different imaging configurations for a To compare the different imaging configurations for a Separated Spacecraft Interferometer operating from an Separated Spacecraft Interferometer operating from an Earth’s orbit Earth’s orbit

Deployment and Geometry Maintenance Deployment and Geometry Maintenance  Deployable Membranes Used for solar arrays, sunshields, decoys Being researched for apertures starting at RF and eventually going to optical

Why Cost Estimation? Critically important part of system design Too high – lose the contract award Too low – over-run cost plus contracts, company loss on fixed price contracts

— In order to point and slew optical systems, spacecraft attitude control provides coarse pointing while optics control provides fine pointing

Space Systems Laboratory Massachusetts Institute of Technology Optimization of Separated Spacecraft Interferometer Trajectories in the Absence of A Gravity-Well Optimization of Separated Spacecraft Optimization of Separated Spacecraft Interferometer Trajectories in the Interferometer Trajectories in the Absence of A Gravity Absence of A Gravity-Well Edmund M. Edmund M. Kong Prof David W. Miller David W. Miller