Biography

Donn Liddle is a photogrammetrist in the Image Science and Analysis Group /XI, which is part of the Astromaterials Research Exploration and Science (ARES) Division at the Johnson Space Center (JSC). He graduated from California State University Fresno, with a BS in Surveying and Photogrammetric Engineering and an MS in Civil Engineering. He began his professional career with the Fort Worth Texas Division of General Dynamics developing photogrammetric and optical based, high precision industrial measurement techniques in support of F-16, A-12, and F-22 design and production. He then supported construction of the Super Conducting Super Collider project coordinating geodetic and construction surveying data and computations.

Following several years of Ph.D. studies in digital photogrammetry at The Ohio State University he joined the Image Science and Analysis Group in 1997, as the group's first photogrammetrist. During his twenty years at the Johnson Space Center, Mr. Liddle has developed pioneering techniques for using photogrammetry to support operation of the Space Shuttle, assembly of the International Space Station (ISS) and assessing the health of other space vehicles while in orbit. He has developed specialized on-orbit image acquisition procedures and trained astronauts in techniques for collecting imagery for stereo and convergent photogrammetric analysis. He has planned and managed image acquisition and conducted analysis on hundreds of unique tasks supporting ground based testing and on-orbit operations. He is a contributing author to the Manual of Photogrammetry and continues to develop new photogrammetric techniques for extending the application of photogrammetric analysis to the on-orbit environment.