Results 11 to 20 of about 70,591 (246)

A Model of Gravity Vector Measurement Noise for Estimating Accelerometer Bias in Gravity Disturbance Compensation

open access: yesSensors, 2018
Compensation of gravity disturbance can improve the precision of inertial navigation, but the effect of compensation will decrease due to the accelerometer bias, and estimation of the accelerometer bias is a crucial issue in gravity disturbance ...
Junbo Tie   +5 more
doaj   +3 more sources

Horizontal gravity disturbance vector in atmospheric dynamics

open access: yesDynamics of Atmospheres and Oceans, 2023
Peter C Chu
openaire   +3 more sources

Similar simulation test study on the influence of mining on shaft deflection of deep soil based on hydraulic permeability model

open access: yesEnergy Exploration & Exploitation, 2023
Ensuring shaft safety is critical in the process of coal mining. During coal mining in the Guotun coal mine, Shandong Province, China, issues, such as shaft deflection, tank channel and shaft deformation, and tank jamming, which did not appear in the ...
Yu Wang   +10 more
doaj   +1 more source

The Modulation Effect on the ELVEs and Sprite Halos by Concentric Gravity Waves Based on the Electromagnetic Pulse Coupled Model

open access: yesAtmosphere, 2021
By employing the finite-difference time-domain method, the processes of electric field variation and morphological development of the optical radiation field of ELVEs and sprite halos were simulated in this article.
Chao Wang   +4 more
doaj   +1 more source

A numerical investigation of horizontal viscous gravity currents [PDF]

open access: yes, 2009
We study numerically the viscous phase of horizontal gravity currents of immiscible fluids in the lock-exchange configuration. A numerical technique capable of dealing with stiff density gradients is used, allowing us to mimic high-Schmidt-number ...
Hallez, Yannick, Magnaudet, Jacques
core   +2 more sources

Gravity Compensation Using EGM2008 for High-Precision Long-Term Inertial Navigation Systems

open access: yesSensors, 2016
The gravity disturbance vector is one of the major error sources in high-precision and long-term inertial navigation applications. Specific to the inertial navigation systems (INSs) with high-order horizontal damping networks, analyses of the error ...
Ruonan Wu   +5 more
doaj   +1 more source

A dominant acoustic-gravity mode in the polar thermosphere [PDF]

open access: yesAnnales Geophysicae, 2015
The article presents a summary of the main findings of the systematic study of acoustic-gravity waves (AGWs) in the polar thermosphere. This study was based on the in situ measurements made by the Dynamics Explorer 2 (DE2) spacecraft late in its ...
A. K. Fedorenko   +3 more
doaj   +1 more source

Features of Winter Stratosphere Small-Scale Disturbance during Sudden Stratospheric Warmings

open access: yesRemote Sensing, 2022
We analyzed the characteristics of small-scale wave disturbances emerging during the evolution and transformation of the jet stream (JS) in the winter stratosphere and the lower mesosphere of the northern hemisphere, including the periods of sudden ...
Anna S. Yasyukevich   +4 more
doaj   +1 more source

Two-dimensional Kalman filter approach to airborne vector gravimetry

open access: yesJournal of Geodetic Science, 2019
The paper presents a new approach to the airborne vector gravimetry problem. The idea of the approach is to take into account spatial correlation of the gravity field to improve observability of horizontal components of the gravity disturbance vector ...
Vyazmin V.S., Bolotin Yu.V.
doaj   +1 more source

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