Results 21 to 30 of about 143,454 (291)

The Optimal Degree of Gravity Spherical Harmonic Model Calculation for Gravity Disturbance Compensation in Inertial Navigation

MATEC Web of Conferences, 2018
In recent years, the significant improvement of inertial navigation, leaves the gravity disturbance as the important factor which affects the accuracy of inertial navigation.
TIE Junbo, WU Meiping, Cao Juliang, Lian Junxiang, Cai Shaokun, Wang Lin   +5 more
doaj   +1 more source

Daytime F Region Echoes at Equatorial Ionization Anomaly Crest During Geomagnetic Quiet Period: Observations From Multi‐Instruments

Space Weather, 2022
By using Qujing very high frequency radar (25.6°N, 103.7°E, magnetic latitude 16.1°N, magnetic longitude 177.0°E), daytime F region echoes were reported at equatorial ionization anomaly crest on 26 June 2020. Radar interferometry experiment was performed
Yi Liu, Zhongxin Deng, Tong Xu, Jian Kong, Chen Zhou, Yibin Yao, Qiong Tang, Zhengyu Zhao   +7 more
doaj   +1 more source

Drag-free and attitude control for the GOCE satellite [PDF]

, 2008
The paper concerns Drag-Free and Attitude Control of the European satellite Gravity field and steady-state Ocean Circulation Explorer (GOCE) during the science phase.
Aguirre-Martinez, Bertotti, Canuto, Canuto, Canuto, Donati, Enrico Canuto, Fichter, Luenberger, Picone, Scheeres, Silvestrin, Touboul, Vaillon   +13 more
core   +1 more source

A numerical investigation of horizontal viscous gravity currents [PDF]

, 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

Realism And Empirical Evidence [PDF]

, 1997
We define realism using a slightly modified version of the EPR criterion of reality. This version is strong enough to show that relativity is incomplete.
Schmelzer, Ilja
core   +3 more sources

The nonlinear effects on the characteristics of gravity wave packets: dispersion and polarization relations [PDF]

Annales Geophysicae, 2000
By analyzing the results of the numerical simulations of nonlinear propagation of three Gaussian gravity-wave packets in isothermal atmosphere individually, the nonlinear effects on the characteristics of gravity waves are studied quantitatively.
S.-D. Zhang, F. Yi, J.-F. Wang
doaj   +1 more source

An ionospheric disturbance caused by the disintegration of a typhoon observed by the SWARM satellites

地球与行星物理论评, 2021
In this paper, based on the observation data of the SWARM satellites, the disturbance of magnetic field and plasma recorded by two satellites are extracted and studied by differential, Fourier analysis, Wavelet transform and other algorithms.
Xiaohui Du, Xuemin Zhang
doaj   +1 more source

Piecewise continuous partition function method in the theory of wave perturbations of inhomogeneous gas

, 2004
The problem of wave disturbance propagation in rarefied gas in gravity field is explored. The system of hydrodynamic-type equations for a stratified gas in gravity field is derived from BGK equation by method of piecewise continuous partition function ...
Alexeev, Alexeev, Alexeev, Buckner, Cercignani, Chapman, Chen, Chen, D.A. Vereshchagin, Greenspan, Gross, Ivchenko, Kostomarov, Leble, Leble, Lees, Liu, Loyalka, M.A. Solovchuk, Meyer, Mott-Smith, S.B. Leble, Sampson, Shidlovskij, Sirovich, Spiegel, Vereshchagin, Vereshchagin   +27 more
core   +1 more source

Comparison of various isostatic marine gravity disturbances

Journal of Earth System Science, 2015
We present and compare four types of the isostatic gravity disturbances compiled at sea level over the world oceans and marginal seas. These isostatic gravity disturbances are computed by applying the Airy–Heiskanen (AH), Pratt–Hayford (PH) and Vening Meinesz–Moritz (VMM) isostatic models.
Robert Tenzer, Mohammad Bagherbandi, Lars E Sjöberg   +2 more
openaire   +2 more sources

A Feasibility Analysis of Land-Based SINS/GNSS Gravimetry for Groundwater Resource Detection in Taiwan

Sensors, 2015
The integration of the Strapdown Inertial Navigation System and Global Navigation Satellite System (SINS/GNSS) has been implemented for land-based gravimetry and has been proven to perform well in estimating gravity.
Kai-Wei Chiang, Cheng-An Lin, Chung-Yen Kuo   +2 more
doaj   +1 more source