Phone: (303) 492-3944
Address: 431 UCB, University of Colorado, Boulder, CO 80309
I conduct research in spacecraft guidance, navigation, and control (GNC), astrodynamics, and small body science - specifically asteroids and comets. Although there are many exciting areas of research in these fields today, my focus is on the following areas which I find to be crucial to humanity’s future in space:
- spacecraft autonomy
- asteroid missions and resource utilization
- orbital debris
- asteroid dynamics and evolution
- commercial space
- Assistant Professor, University of Colorado at Boulder, 2016-Present
- Assistant Research Professor, University of Colorado at Boulder, 2013-2016
- Research Associate, University of Colorado at Boulder, 2011-2013
- Graduate Research Assistant, University of Colorado at Boulder, 2008-2011
- Member of the Technical Staff, The Aerospace Corporation, 2004-2008
- Ph.D. Aerospace Engineering Sciences, University of Colorado, 2011
- M.S.E. Astronautical Engineering, University of Southern California, 2006
- B.S.E. Aerospace Engineering, University of Michigan, 2004
Find the details on my CV
The images above illustrate some of the areas of research I have worked on. Starting from the top left: an artists illustration of the OSIRIS-REx spacecraft performing its touch-and-go sampline of the near-Earth asteroid Bennu; a simulated flash LIDAR image of Itokawa used for on-board orbit detrmination (courtesy Ann Dietrich); an example of a 3-spacecraft formation flight controller performance; the Lofted Regolith Sampling (LoRS) concept of operations; a high area-to-mass ration (HAMR) shape model with the corresponding SRP force maps below; the Golevka shape model with the surface colored to illustrate the angle with respect to an incoming laser ablation beam; the KW4 binary asteroid shape models used as the basis for dynamical studies.
This course gives a comprehensive view of guidance systems used in space vehicles, and methods for analyzing the performance of these systems. The types of guidance systems covered include launch vehicle ascent, intercept/rendezvous, interplanetary, orbit station-keeping, atmospheric re-entry, lander, and low-thrust. The mathematical foundation of these systems is derived and discussed. Real world applications are presented by reviewing selections from published literature. Course work emphasizes performance analysis.
This course provides an in-depth discussion of advanced orbit determination techniques.The focus is on the fundamentals of these methods based on non-linear estimation theory. Topics covered include extended Kalman filters, unscented Kalman filters, square-root information filters, consider covariance analysis, and particle filters.