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The GRADIO spaceborne gravity gradiometer: Development and accommodationThe European ARISTOTELES mission aims at the determination of the Earth's gravity field at short wavelength with a global coverage. Gravity gradient measurements will be achieved during six months by the GRADIO instrument onboard a dedicated satellite in a near dawn-dusk sun-synchronous orbit at an altitude of 200 km. The objective is an accuracy of better than 5 mgals for gravity anomalies, at ground level for blocks of 1 x 1 deg. According to present knowledge of the potential, the recovery of higher spherical harmonics (degree and order greater than 30) is of main importance. This leads to focus on the variations of the measured components T(sub ij) of the gravity gradient tensor, at frequencies greater than 5 x 10(exp -3) Hz. The resolution, required for the gradiometer is 10(exp -2) Eotvos (i.e., 10(exp -11)/s squared) with an averaging time of 4 s.
Document ID
19900011244
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bernard, A. (Office National d'Etudes et de Recherches Aerospatiales Paris, France)
Date Acquired
September 6, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Ohio State Univ., Progress in the Determination of the Earth's Gravity Field
Subject Category
Geophysics
Accession Number
90N20560
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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