Results 21 to 30 of about 4,802 (208)
Two-dimensional Kalman filter approach to airborne vector gravimetry
Journal 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.
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Improving the Strapdown Airborne Vector Gravimetry by a Backward Inertial Navigation Algorithm
Sensors, 2018 Strapdown airborne gravimetry is an efficient way to obtain gravity field data. A new method has been developed to improve the accuracy of airborne vector gravimetry.
Minghao Wang +5 more
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Research on Unpowered Trim Ascent Motion Characteristics of Deep-sea Vehicles
水下无人系统学报, 2022 To improve the ascent response speed of unpowered deep-sea vehicles, and meet the requirements of mission loads for its water-exit attitude, considering the effect of ocean currents and buoyancy changes, a space motion simulation model of the vehicle was
Zhi-chao ZHAO +3 more
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PREDOMINANT TRAVELING IONOSPHERIC DISTURBANCES OVER EASTERN EUROPE DURING LOW LEVELS OF SOLAR AND GEOMAGNETIC ACTIVITIES USING INCOHERENT SCATTER RADAR DATA [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: Detection of wave processes of various temporal and spatial scales in the mid-latitude ionosphere over the Eastern Europe near the characteristic geophysical time periods (equinoxes and solstices) during magnetically quiet and weakly disturbed ...
K. D. Aksonova, S. V. Panasenko
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Vietnam Journal of Mechanics, 2019 The elevator is usually hinged to the horizontal tail, which acts as a balance and controls the altitude, establishes a steady motion for the aircraft at all lift coefficients. During elevator rotating, the aircraft needs to be stable to establish a new
Hoang Thi Bich Ngoc, Bui Vinh Binh
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Energies, 2020 Motion states of bottom hole assembly (BHA) have a great effect on the trajectory control and drilling efficiency while rotary drilling. In order to study the motion states of BHA in horizontal wells, a BHA dynamic model with the finite element method ...
Wei Li +4 more
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Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023 Background. Volcanoes belong to high-energy sources capable of causing significant disturbances in all subsystems of the Earth – atmosphere – ionosphere – magnetosphere (EAIM) system.
L. F. Chernogor +2 more
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Geophysical Research Letters, 2018 Acoustic waves generated in the lower atmosphere may become an important source of variability in the upper atmosphere. Although excited with small amplitudes compared to gravity waves, they are minimally subjected to viscous dissipation and may reach ...
Irfan Azeem +2 more
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Numerical modelling of the thermospheric and ionospheric effects of magnetospheric processes in the cusp region [PDF]
Annales Geophysicae, 1996 The thermospheric and ionospheric effects of the precipitating electron flux and field-aligned-current variations in the cusp have been modelled by the use of a new version of the global numerical model of the Earth's upper atmosphere developed for ...
A. A. Namgaladze +3 more
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Parameters of traveling ionospheric disturbances: results from spaced oblique HF sounding
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022 Urgency. A characteristic feature of the ionospheric radio channel is that its parameters depend on season, local time, solar activity, geographic coordinates, the state of the sun, the state of atmospheric-space weather, etc. The state of the atmosphere
L. F. Chernogor +6 more
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