NASA NTRS · 19710000084
Modified bubble level senses pitch and roll angles over wide range
Abstract
Bubble level sensor with fiber-optic field flattener is simple, rugged, small, and impervious to temperature and vibration effects. Pitch angles from -15 deg to +40 deg and roll angles of +30 deg are determined within 0.5 deg.
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Mattson, E. J., Mcnally, P. F.. 1971-04-01. Modified bubble level senses pitch and roll angles over wide range. https://ntrs.nasa.gov/citations/19710000084
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