APL Research and Development

This issue highlights the diversity of APL's contributions to national and global challenges. The issue begins by discussing APL's role as the independent test and evaluation agent for an unmanned underwater vehicle family of systems, components of which have been fielded by the U.S. Navy. The second article provides an introduction to the physics of fission chains and their detection, of vital importance should a nuclear response team locate a potential nuclear object. The next article describes a process for balancing conflicts among missile system performance goals, engagement support capabilities, and technology constraints. The fourth article details a semiempirical model for leaves as a step toward improving Earth's land characterization and removing radiative effects. The final article highlights a technique for determining the atmosphere's trace gas composition, which has broad applications for measuring gases globally. The issue concludes with a summary of APL's Technical Achievement Awards and this year's winners.

Unmanned Underwater Vehicle Independent Test and Evaluation
William P. Ervin, J. Patrick Madden, and George W. Pollitt

Neutrons: It Is All in the Timing—The Physics of Nuclear Fission Chains and Their Detection
William A. Noonan

Missile Concept Optimization for Ballistic Missile Defense
Alan J. Pue, Richard J. Hildebrand, Daniel E. Clemens, Jonah R. Gottlieb, James M. Bielefeld, and Timothy C. Miller

Improving Earth Background Characterization Through Modeling and Measurements of Leaf Bidirectional Reflectivity
Shadrian B. Strong, Michael E. Thomas, Andrea M. Brown, and Elena Y. Adams

The MSX/UVISI Stellar Occultation Experiments: Proof-of-Concept Demonstration of a New Approach to Remote Sensing of Earth's Atmosphere

Ronald J. Vervack Jr., Jeng-Hwa Yee, William H. Swartz, Robert DeMajistre, and Larry J. Paxton

APL Achievement Awards and Prizes

Linda L. Maier-Tyler

Web-ready front cover (JPG)  |  High-resolution front cover (PDF)

Masthead  |  Inside back cover (PDF)

Entire issue (PDF)

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© 2014 by The Johns Hopkins University Applied Physics Laboratory

The electronic version of the Johns Hopkins APL Technical Digest was created by
the Technical Communications Group (TST).