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Results from the OFIS (Optical Fiber Infrasound Sensor)

Institute of Geophysics and Planetary Physics Scripps Institution of Oceanography University of California, San Diego. Results from the OFIS (Optical Fiber Infrasound Sensor). Mark Zumberge, Jonathan Berger, Michael Hedlin, Eric Husmann, and Scott Nooner. Sensor Concept.

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Results from the OFIS (Optical Fiber Infrasound Sensor)

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  1. Institute of Geophysics and Planetary Physics Scripps Institution of Oceanography University of California, San Diego Results from the OFIS(Optical Fiber Infrasound Sensor) Mark Zumberge, Jonathan Berger, Michael Hedlin, Eric Husmann, and Scott Nooner

  2. Sensor Concept • A long, compliant, sealed tube deforms as pressure changes • An optical fiber wrapped around the tube senses the deformation

  3. A truly integrated average

  4. Instrument Constructionand Installation

  5. Results

  6. Effect of geometry on response linear sensors depend on length, signal , and arrival azimuth circular sensors depend on diameter and signal 

  7. Conclusions • The OFIS is comparable to the best pipe array from the microbarom band up to 1 Hz • Above 1 Hz, the OFIS is significantly quieter • At long periods, the OFIS needs improvement • The sensor can be made significantly longer to average over a larger region

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