NASA NTRS · 19710000189
Inexpensive, large-diameter, radar tracking and calibration spheres
Abstract
Plastic models of polystyrene beads are produced to within 0.02 cm accuracy, in various diameters designed to meet exact requirements of particular radar system frequency spectrum. They are inexpensive and do not require special handling imposed on metal spheres.
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Holdren, R. H.. 1971-06-01. Inexpensive, large-diameter, radar tracking and calibration spheres. https://ntrs.nasa.gov/citations/19710000189
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