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This task group will be divided into strong and weak motion sensors.

Chairs: Robert Nigbor, UCLA, John R. Evans, USGS, and Robert Hutt, USGS.
Strong-motion rotational sensors

  1. Test sensitivity, linearity, 6DOF cross-axis sensitivity, and self noise of various strong-motion rotational sensors.
  2. Work with the USGS Albuquerque Seismological Laboratory to procure and validate improved testing aparatus and to perform precision tests of at least strong-motion rotational sensors.
  3. Testing and verification of multiple rotational sensors in Bob Nigbor’s in-door and out-door facilities in September-November, 2006. To be followed by additional work as improved or additional testing systems become available, probably at the USGS’s Albuquerque Seismological Laboratory (ASL).  Active members for this task force includes Robert Nigbor, John Evans, Bob Hutt, and Willie Lee.

: Ulrich Schreiber, Wettzell, and J. Wells, Christchurch.
Weak-motion Rotational sensors

  1. Improving the performance of large ring lasers for seismic studies
  2. Verification of rotational sensor data by collocation of alternative techniques
  3. Improve existing detection concepts
  4. Explore and evaluate alternative sensor concepts (FOG, IMU, Superfluid helium, electro-chemical) for teleseismic and strong motion application
  5. Develop a full highly sensitive 6-degrees of freedom sensor to be tested at Pinon Flat Observatory and verify the performance (investigate implications of alignment errors)
  6. Develop and evaluate sensor concepts to monitor rotations in civil eng. structures
  7. Enhance productivity by interacting with other development groups
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