Dot-Projection Photogrammetry and Videogrammetry of Gossamer Space Structures

Details Dot-Projection Photogrammetry and Videogrammetry of Gossamer Space Structures Dot-Projection Photogrammetry and Videogrammetry of Gossamer Space Structures

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003stin...0314949p&link_type=abstract

Conference Paper, 21st International Modal Analysis Conference (IMAC)

Statistics

Applications

Photogrammetry, Video Equipment, Spacecraft Structures, Laser Induced Fluorescence, Antenna Arrays, Coordinates, Installing, Large Space Structures, Solar Arrays, Solar Collectors, Solar Sails, Targets, Transmitters, Vibration Measurement

Scientific paper

This paper documents the technique of using hundreds or thousands of projected dots of light as targets for photogrammetry and videogrammetry of gossamer space structures. Photogrammetry calculates the three-dimensional coordinates of each target on the structure, and videogrammetry tracks the coordinates versus time. Gossamer structures characteristically contain large areas of delicate, thin-film membranes. Examples include solar sails, large antennas, inflatable solar arrays, solar power concentrators and transmitters, sun shields, and planetary balloons and habitats. Using projected-dot targets avoids the unwanted mass, stiffness, and installation costs of traditional retroreflective adhesive targets. Four laboratory applications are covered that demonstrate the practical effectiveness of white-light dot projection for both static-shape and dynamic measurement of reflective and diffuse surfaces, respectively. Comparisons are made between dot-projection videogrammetry and traditional laser vibrometry for membrane vibration measurements. The paper closes by introducing a promising extension of existing techniques using a novel laser-induced fluorescence approach.

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