Full Spectrum Falcon – Measuring wide broadband airborne gravity data

Vibration in the audio frequency band affects the performance of rotating gravity gradiometers used for airborne mineral exploration. This is probably due to translation to rotation coupling inside the gradiometer platform. It was found that the DC gravity gradient signal was proportional to the square of the third time derivative of position, or jerk squared. The demanding airborne environment for such instrumentation demands a light weight broadband acoustic shield and vibration isolator. This paper presents the design principles for such an isolator, based on vibration isolated spherical shell structures. Performance data are presented as well as flight test data that demonstrated a 14% gravity gradient noise reduction compared with an unshielded instrument.

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Full Spectrum Falcon – Measuring wide broadband airborne gravity data

Cited by 6 publications

References 3 publications

Calibrating nonlinearity coefficients of a nano-g accelerometer by dual-frequency excitation on a shaker

Calibrating nonlinearity coefficients of a nano-g accelerometer by dual-frequency excitation on a shaker

Quantitative analysis and cancellation of rotating modulation noise in gravity gradient measurement

Acoustic and vibration isolation for a gravity gradiometer

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