NOBLE HATTEN. W. R. Woolrich Laboratories, 210 E. 24th Street, Stop C0600 Austin, TX (512)

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1 NOBLE HATTEN W. R. Woolrich Laboratories, 210 E. 24th Street, Stop C RESEARCH INTERESTS (512) Space mission design; space domain awareness; optimization and estimation of dynamic systems; spacecraft guidance, navigation, and control; analytical and numerical astrodynamics algorithms; high-performance computing algorithms; space environment modeling EDUCATION Ph.D. in Aerospace Engineering Dec The University of Texas at Austin; GPA: 4.00 Adviser: Dr. Ryan P. Russell Dissertation: Space Object Translational and Rotational State Prediction and Sensitivity Calculation M.S.E. in Aerospace Engineering Dec The University of Texas at Austin; GPA: 3.95 Adviser: Dr. Cesar Ocampo Thesis: A Critical Evaluation of Modern Low-Thrust, Feedback-Driven Spacecraft Control Laws B.S. in Aerospace Engineering with Highest Honors May 2011 The University of Texas at Austin; GPA: 4.00 RESEARCH EXPERIENCE The University of Texas at Austin Jan present Research Associate; Director, Texas Spacecraft Laboratory (TSL); Research Fellow, Center for Space Research (CSR) Direct student-operated small-satellite laboratory Serve as principal investigator for student-built small-satellite missions Actively seek and secure external funding and colloboration opportunities with UT Austin faculty/staff, other universities, government agencies, and private industry Manage team of 50+ undergraduate volunteers and educate students in all aspects of small-spacecraft design, fabrication, testing, and operation Upon starting position, immediately took over as principal investigator of the 3U CubeSat mission AR- MADILLO, winner of the University Nanosat UNP-7 competition and manifested for launch on STP-2 The University of Texas at Austin Jan Dec. 2012, Jan Jan Graduate & Undergraduate Research Assistant Jan Jan. 2017: Developed efficient algorithms for three- and six-degree-of-freedom space object propagation in Earth-orbit environment Implemented fast dynamics models to provide adequate fidelity while reducing run time Included propagation of both state and variational equations to support estimation applications Utilized both classical (e.g., Gauss-Jackson) and innovative (e.g., variable-step implicit Runge-Kutta) numerical ordinary differential equations (ODE) solution techniques Improved performance by leveraging high-performance computing strategies, such as parallelization via multicore CPUs and GPUs Took advantage of analytical methods wherever possible, including techniques based on general perturbations Curriculum Vitae 1 of 5 Noble Hatten

2 Developed interfaces for smooth interaction of propagation software with software developed by project partners Collaborated with project partners to ensure suitability of models for intended applications Documented work in regular reports and presentations Funded by Air Force Research Laboratory through subcontract with Emergent Space Technologies, Inc. Jan Dec. 2012: Investigated low-thrust and high-thrust, feedback-driven spacecraft control laws and their application to the automation of trajectory optimization Independently implemented the Jet Propulsion Laboratory s proximity quotient (Q-Law) low-thrust control algorithm Implemented the cross-product steering law for high-thrust spacecraft maneuvers Developed a methodology for using the cross-product steering law, together with an adjoint-control transformation, to generate intelligent initial guesses for indirect trajectory optimization algorithms Funded by NASA NASA Langley Research Center June 2013 Aug. 2013, June 2014 Aug Langley Aerospace Research Student Scholar Hampton, VA Worked as student intern for two summers in the Space Mission Analysis Branch of the Systems Analysis and Concepts Directorate 2014: Supported development of hybrid solar-electric and chemical propulsion transportation architecture for crew missions to Mars Analyzed architecture sensitivities using (1) MALTO and (2) personally developed tools based on analytical approximations Modeled point designs in high fidelity using Copernicus Used results of analyses to make mission architecture recommendations (e.g., crew size, power requirements, Mars parking orbit selection) 2013: Developed and implemented tools for determining and achieving efficient parking orbits about Mars via impulsive or low-thrust maneuvers Wrote software to determine Mars sphere-of-influence fuel requirements based on apotwist Mars arrival and departure maneuver sequence Created and populated knowledge base for the efficient storage and access of spacecraft trajectories created by the Space Mission Analysis Branch Institute for Computational Engineering and Sciences June 2009 Jan Moncrief Summer Intern & Undergraduate Research Assistant Created foundation for an OpenGL-based visualization system for finite-element modeling routines Wrote interface to allow Fortran modeling routines to display graphical output using OpenGL routines written in C The University of Texas at Austin Aug May 2009 Satellite Design Laboratory Team Member Contributed to the design and fabrication of the propulsion system of 2-STEP, an entry in the University NanoSat 5 competition Used computer-aided design and drafting software (SOLIDWORKS) to model the placement of propulsion system elements within the satellite structure Coordinated purchases of raw materials from providers and used UT Austin machining tools to fabricate propulsion system components Curriculum Vitae 2 of 5 Noble Hatten

3 TEACHING EXPERIENCE The University of Texas at Austin Jan Dec Assistant Instructor, Graduate Teaching Assistant & Undergraduate Grader Instructor for Flight Dynamics Laboratory (3 semesters) Prepared and delivered lectures Administered laboratory experiments Held office hours Graduate teaching assistant for Flight Dynamics Laboratory (3 semesters) and Introduction to Computer Programming (1 semester) Administered laboratory experiments Held office hours and help sessions Delivered guest lectures Undergraduate grader for Mechanics of Solids (1 semester) TECHNICAL SKILLS Orbital Mechanics Proficient in three-degree-of-freedom and six-degree-of-freedom modeling for Earth-orbiting or interplanetary space objects Completed graduate-level coursework in celestial mechanics, orbit determination, and satellite geodesy Space Mission Design Completed graduate-level coursework in space mission design and undergraduate-level coursework in space systems engineering Dynamical Systems Proficient in Newtonian, Lagrangian, and Hamiltonian system formulations Proficient in theory and implementation of numerical algorithms for the solution of ordinary differential equation initial value problems Experienced with Hamiltonian perturbation methods Completed graduate-level coursework in linear system analysis and nonlinear dynamics Optimization of Dynamical Systems Familiar with development of gradient-based and non-gradient-based optimization and root-solving algorithms Experienced with use of black-box optimization software Completed graduate-level coursework in parameter optimization and optimal control theory, optimization of spacecraft trajectories, and development of optimization algorithms Estimation of Dynamical Systems Experienced with batch and sequential estimation of dynamical systems Completed graduate-level coursework in statistical orbit determination and model-based determination and estimation Control of Dynamical Systems Experienced with design and implementation of nonlinear feedback control laws for low-thrust spacecraft maneuvering Completed graduate-level coursework in nonlinear control theory and satellite control systems; completed undergraduate-level coursework in linear control theory Curriculum Vitae 3 of 5 Noble Hatten

4 Software Programming/scripting languages: Proficient in Fortran and MATLAB; experienced with L A TEX; familiar with C, C++, Python, and Mathematica Software: Experienced with Copernicus, MALTO, and Gpredict; familiar with GMAT, Systems Tool Kit (STK), SOLIDWORKS, and GNU Radio High-performance computing standards: Experienced with OpenMP and CUDA Integrated development environments: Experienced with Microsoft Visual Studio, Eclipse, and PyCharm Operating systems: Experienced with Windows, Mac OS X, and Linux for general use and software development Version control: Experienced with Git and Subversion Other Licensed amateur radio operator (technician class), 2009 present REFEREED PUBLICATIONS Hatten, N., Russell, R. P., Parallel Implicit Runge-Kutta Methods Applied to Coupled Orbit/Attitude Propagation, The Journal of the Astronautical Sciences, DOI /s (online first Dec. 2016) Hatten, N., Russell, R. P., A Smooth and Robust Harris-Priester Atmospheric Density Model for Low Earth Orbit Applications, Advances in Space Research, Vol. 59, No. 2, pp , 2017, DOI /j.asr Hatten, N., Russell, R. P., Comparison of Three Stark Problem Solution Techniques for the Bounded Case, Celestial Mechanics and Dynamical Astronomy, Vol. 121, pp , 2015, DOI /s z. UNREFEREED PUBLICATIONS Hatten, N., Space Object Translational and Rotational State Prediction and Sensitivity Calculation, Ph.D. dissertation, The University of Texas at Austin, Hatten, N., A Critical Evaluation of Modern Low-Thrust, Feedback-Driven Spacecraft Control Laws, Master s thesis, The University of Texas at Austin, CONFERENCE PROCEEDINGS Pinon III, E., Anderson, J., Ceniceros, A., Jones, B. A., Russell, R. P., Hatten, N., and Ravago, N., Improvements to a Hierarchical Mixture of Experts System Used for Characterization of Resident Space Objects, Paper , AAS/AIAA Astrodynamics Specialist Meeting, Columbia River Gorge, Stevenson, WA, Aug (poster) Hatten, N., Russell, R. P., The Eccentric Case of a Fast-Rotating, Gravity-Gradient-Perturbed Satellite Attitude Solution, Paper AAS , 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, TX, Feb Hatten, N., Russell, R. P., A Semianalytical Technique for Six-Degree-of-Freedom Space Object Propagation Paper AAS , 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, TX, Feb Hatten, N., Russell, R. P., Decoupled Direct State Transition Matrix Calculation with Runge-Kutta Methods, Paper AAS , 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, TX, Feb Curriculum Vitae 4 of 5 Noble Hatten

5 Jones, B. A., Hatten, N., Ravago, N., Russell, R. P., Ground-based Tracking of Geosynchronous Space Objects with a GM-CPHD Filter, Advanced Maui Optical and Space Surveillance Technologies (AMOS) Conference, Maui, HI, Sept Hatten, N., Russell, R. P., Parallel Implicit Runge-Kutta Methods Applied to Coupled Orbit/Attitude Propagation, Paper AAS , 26th AAS/AIAA Space Flight Mechanics Meeting, Napa, CA, Feb Hatten, N., Russell, R. P., A Smooth and Robust Harris-Priester Atmospheric Density Model, Paper AAS , 26th AAS/AIAA Space Flight Mechanics Meeting, Napa, CA, Feb Merrill, R. G., Strange, N., Qu, M., Hatten, N., Mars Conjunction Crewed Missions with a Reusable Hybrid Architecture, Paper , IEEE Aerospace Conference, Big Sky, MT, March (peer reviewed) Hatten, N., Russell, R. P., Application of the Stark Problem to Space Trajectories with Time-Varying Perturbations, Paper AAS , 24th AAS/AIAA Space Flight Mechanics Meeting, Santa Fe, NM, Jan PRESENTATIONS Hatten, N., Russell, R. P., Averaged Attitude Solution for Fast-Rotating, Gravity-Gradient-Perturbed Space Object, The University of Texas at Austin Aerospace Engineering and Engineering Mechanics External Advisory Committee Meeting,, Oct (poster) Hatten, N., An Approach to Using OpenGL to Display Graphical Results of Fortran Computational Programs, The University of Texas at Austin Aerospace Engineering and Engineering Mechanics External Advisory Committee Meeting,, Oct HONORS & AWARDS American Astronautical Society John V. Breakwell Student Travel Award (Feb. 2016) Distinguished Engineering Scholar, UT Austin (2011) University Honors, UT Austin ( ) Ernest J. Cockrell Scholar, UT Austin ( ) National Merit Scholar (2007) PROFESSIONAL MEMBERSHIPS American Astronautical Society American Institute of Aeronautics and Astronautics PROFESSIONAL SERVICE Peer Review IEEE Transactions on Aerospace and Electronic Systems (Oct present) Advances in Space Research (Aug present) AIAA Journal of Guidance, Control, and Dynamics (Dec present) Named Excellent Reviewer, Oct Sept Curriculum Vitae 5 of 5 Noble Hatten