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Professor Junkins' Publications

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Click the links above to access Professor Junkins's books, journal papers, and conference papers. Several of the books can be searched on line, and most recent papers can be down-loaded as PDF files.

Overviewed below are several of Professor Junkins historical contributions to Navigation, Mechanics and Control of Aerospace Systems. His work has been documented in over 400 articles and 8 books. Some notable early highlights of his career are

  1. Laser altimeter experiment for Apollo missions 15-17, developed a precise model for the shape of the moon.
  2. Trajectory optimization for Delta booster missions, an early application of gradient/steepest desent theory/ algorithms to a practical problem.
  3. Minimum-time maneuvers of spinning spacecraft using the earth's magnetic field. This approach was adopted successfully for several spacecraft, starting with the 1981 NOVA spacecraft.
  4. Development of optimal control theory formulations for large angle spacecraft attitude maneuvers using reaction wheels. This work has indirectly impacted several applications including the 1994 Clementine attitude maneuver strategy.
  5. Novel spacecraft attitude determination using star sensing and star pattern recognition, adopted on numerous DOD and NASA spacecraft. This work has been extended and adopted on several recent spacecraft, including Clementine (1994), NEAR (1996-), STS 107 StarNav experiment (June 2001), and EO-3 (CIRCA 2003).
  6. Mapping the earth's terrain and gravity field from space observations, co-developed (with J. R. Jancaitis) SAPMAP, an early automated mapping system.
  7. Developed the first finite element representation of the earth's gravity anomalies. This work supported early inertial guidance methods for Polaris missiles, and established the utility of a significant general-purpose method (based on ideas introduced by Junkins, Jancaitis, and Miller) for piecewise continuous approximation in n-dimensional spaces.

Recent Accomplishments by Junkins and his Students:

  1. Invention of the laser-scanning electronic whiteboard.
  2. Invention of a split field of view star camera (StarNavII), and associated image processing algorithms to efficiently identify the stars and simultaneously imaging two orthogonal starfields to determine precise three axis spacecraft attitude.
  3. Invention of a navigation sensor (VisNav), and associated algorithms, to enable proximity navigation of two aerospace vehicles to enable autonomous rendezvous and docking. Enables autonomous aerial refueling as well as autonomous spacecraft proximity operations.
  4. Invention of a novel laboratory robot that enables the emulation of 6 degree of freedom spacecraft proximity operations in a ground laboratory, to research/develop/ validate spacecraft proximity navigation, guidance, and control.
  5. Formulation of a novel method (GLO-MAP)for Global-Local Approximation in n-dimensions - combines the power of piecewise continuous (meshless finite-element-like) approximation with inherently adaptive orthogonal function approximation. Based on this approach, novel methods have been developed for solving important n-dimensional partial differential equations such as the Fokker-Planck equation.
 

 


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