Abstract
Measuring in a single location on Earth its angular rotation rate with respect to the celestial frame, with a sensitivity enabling access to the tiny Lense-Thirring effect is an extremely challenging task. GINGERINO is a large frame ring laser gyroscope, operating free running and unattended inside the underground laboratory of the Gran Sasso, Italy. The main geodetic signals, i.e., Annual and Chandler wobbles, daily polar motion and Length of the Day, are recovered from GINGERINO data using standard linear regression methods, demonstrating a sensitivity better than 1 prad/s, therefore close to the requirements for an Earth-based Lense-Thirring test.
Highlights
Rapid CommunicationsUnderground Sagnac gyroscope with sub-prad/s rotation rate sensitivity: Toward general relativity tests on Earth
Measuring in a single location on Earth its angular rotation rate with respect to the celestial frame, with a sensitivity enabling access to the tiny Lense-Thirring effect, is an extremely challenging task
Improving the accuracy and reliability in data analysis is a crucial point for enabling the use of Ring laser gyroscopes (RLGs) in general relativity (GR) [9] Earth-based measurements and in the investigation of new physics theories [10,11,12]
Summary
Underground Sagnac gyroscope with sub-prad/s rotation rate sensitivity: Toward general relativity tests on Earth. Measuring in a single location on Earth its angular rotation rate with respect to the celestial frame, with a sensitivity enabling access to the tiny Lense-Thirring effect, is an extremely challenging task. The main geodetic signals, i.e., annual and Chandler wobbles, daily polar motion, and length of the day, are recovered from GINGERINO data using standard linear regression methods, demonstrating a sensitivity approaching tens of frad/s, close to the requirements for Earth-based Lense-Thirring and Lorentz violation tests. Ring laser gyroscopes (RLGs), based on the Sagnac effect, have been established as the top sensitivity instruments for measuring rotation rates relative to an inertial frame with excellent accuracy [1]. T is the total angular velocity with respect to an inertial frame experienced by the gyroscope optical cavity, resulting from the sum of several terms: the dominant one, the Earth’s angular
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