Results 11 to 20 of about 2,662 (199)
Remote Sensing, 2023 To calibrate airborne gravity gradiometers currently in development in China, it is urgent to build an airborne gravity gradiometer test site. The site’s selection depends on the preknowledge of high-resolution gravity and gradient structures.
Meng Yang +5 more
doaj +3 more sources
Bragg gravity-gradiometer using the 1S0–3P1 intercombination transition of 88Sr [PDF]
New Journal of Physics, 2018 We present a gradiometer based on matter-wave interference of alkaline-earth-metal atoms, namely ^88 Sr. The coherent manipulation of the atomic external degrees of freedom is obtained by large-momentum-transfer Bragg diffraction, driven by laser fields ...
R P del Aguila +5 more
doaj +3 more sources
Falcon Gravity Gradiometer Technology
Exploration Geophysics, 2001 BHP Billiton's FALCON airborne gravity gradiometer is a derivative of the Gravity Gradient Instrument (GGI) developed by Bell Aerospace (now Lockheed Martin) between 1975 and 1990. The basis of the GGI design is an accelerometer complement consisting of four accelerometers equi-spaced on a circle with their sensitive axes tangential to the circle. This
openaire +3 more sources
A Subnano-g Electrostatic Force-Rebalanced Flexure Accelerometer for Gravity Gradient Instruments [PDF]
Sensors, 2017 A subnano-g electrostatic force-rebalanced flexure accelerometer is designed for the rotating accelerometer gravity gradient instrument. This accelerometer has a large proof mass, which is supported inversely by two pairs of parallel leaf springs and is ...
Shitao Yan +4 more
doaj +2 more sources
The possibility of the calibration/validation of the GOCE data with the balloon-borne gradiometer [PDF]
Advances in Geosciences, 2003 A new calibration/validation experiment for GOCE mission is proposed. Simultaneously with the satellite mission another gradiometer will be flown on the board of the stratospheric balloon on the altitude 20–40 km.
J. B. Zieliński, M. S. Petrovskaya
doaj +3 more sources
Precision atomic gravimeter based on Bragg diffraction [PDF]
New Journal of Physics, 2013 We present a precision gravimeter based on coherent Bragg diffraction of freely falling cold atoms. Traditionally, atomic gravimeters have used stimulated Raman transitions to separate clouds in momentum space by driving transitions between two internal ...
P A Altin +12 more
doaj +3 more sources
Gravity gradiometer system for Earth exploration [PDF]
, 2009 We develop a gravity gradiometer (GG) for use on planetary missions to planets like Mars and Jupiter. With some modifications this development is extended to include (airborne) applications for the Dutch exploratory industry. We adapt key technology of the space based GG for the use in an environment with considerable acceleration noise.
Cuperus, R. +4 more
core +6 more sources
Analysis of limitations on recovery of gravity field based on satellite gravity gradient data
Geodesy and Geodynamics, 2021 Although satellite gravity gradient data plays a great role in determining short-wavelength part of static gravity field model, accuracy of the long-wavelength part of gravity field model recovered by them are poor, which leads to only a few applications
Xiaoyun Wan +4 more
doaj +1 more source
Calibration for GOCE Gradiometer Data Based on the Prior Gravity Models [PDF]
Journal of Geodesy and Geoinformation Science, 2019 The determination of the calibration parameters of the gravity gradiometer play an important role in the GOCE gravity gradient data processing. In this paper, the temporal signals and outliers in the GOCE gravity gradient observations are analyzed. Based
Qingliang QU,Xiaotao CHANG,Shengwen YU,Guangbin ZHU
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Quantum test of the equivalence principle for atoms in coherent superposition of internal energy states. [PDF]
Nat Commun, 2017 The Einstein Equivalence Principle (EEP) has a central role in the understanding of gravity and space-time. In its weak form, or Weak Equivalence Principle (WEP), it directly implies equivalence between inertial and gravitational mass.
Rosi G +7 more
europepmc +2 more sources