Results 11 to 20 of about 464,727 (307)

Terrain analysis using radar shape-from-shading [PDF]

open access: yes, 2003
This paper develops a maximum a posteriori (MAP) probability estimation framework for shape-from-shading (SFS) from synthetic aperture radar (SAR) images.
Bors, A G, Hancock, E R, Wilson, R C
core   +3 more sources

Ensemble Kalman filter assimilation of near-surface observations over complex terrain: comparison with 3DVAR for short-range forecasts [PDF]

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2013
Surface observations are the main conventional observations for weather forecasts. However, in modern numerical weather prediction, the use of surface observations, especially those data over complex terrain, remains a unique challenge.
Zhaoxia Pu   +2 more
doaj   +1 more source

Surface Wind Regionalization in Complex Terrain [PDF]

open access: yesJournal of Applied Meteorology and Climatology, 2008
AbstractDaily wind variability in the Comunidad Foral de Navarra in northern Spain was studied using wind observations at 35 locations to derive subregions with homogeneous temporal variability. Two different methodologies based on principal component analysis were used to regionalize: 1) cluster analysis and 2) the rotation of the selected principal ...
Jiménez, P. A.   +5 more
openaire   +2 more sources

Computational Fluid Dynamics (CFD) Investigation of Wind Turbine Nacelle Separation Accident over Complex Terrain in Japan

open access: yesEnergies, 2018
We have developed an unsteady and non-linear wind synopsis simulator called RIAM-COMPACT (Research Institute for Applied Mechanics, Kyushu University, COMputational Prediction of Airflow over Complex Terrain) to simulate the airflow on a micro scale, i.e.
Takanori Uchida
doaj   +1 more source

Stably stratified canopy flow in complex terrain [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
Stably stratified canopy flow in complex terrain has been considered a difficult condition for measuring net ecosystem–atmosphere exchanges of carbon, water vapor, and energy.
X. Xu, C. Yi, E. Kutter
doaj   +1 more source

Using acoustic sensor technologies to create a more terrain capable unmanned ground vehicle [PDF]

open access: yes, 2009
Unmanned Ground Vehicle’s (UGV) have to cope with the most complex range of dynamic and variable obstacles and therefore need to be highly intelligent in order to cope with navigating in such a cluttered environment.
Erbil, Mehmet Ali   +4 more
core   +1 more source

Characterizing atmospheric stability in complex terrain [PDF]

open access: yesWind Energy Science
Characterizing atmospheric stability becomes challenging in heterogeneous, complex terrain. We use data from 47 meteorological towers associated with the Perdigão field campaign to recommend data-processing approaches and to assess the limitations of ...
N. J. Agarwal, J. K. Lundquist
doaj   +1 more source

Performance of CMIP6 Models in Capturing Summer Maximum Temperature Variability over China

open access: yesAtmosphere
Previous research has primarily focused on assessing seasonal mean or annual extreme climate events, whereas intraseasonal variability in extreme climate has received comparatively little attention, despite its importance for understanding short-term ...
Sikai Liu   +6 more
doaj   +1 more source

Comparative Analysis of Summer Deep Convection Systems over the Tibetan Plateau and Sichuan Basin

open access: yesAtmosphere
Based on GPM satellite observations during June to September from 2014 to 2023, deep convective systems (DCSs) over the Tibetan Plateau and Sichuan Basin exhibited distinct spatiotemporal and structural characteristics.
Xin Yan   +3 more
doaj   +1 more source

Electrooptical complex for terrain on-time survey

open access: yesНаучный вестник МГТУ ГА, 2019
The article deals with a number of approaches to the use of electrooptical systems and unmanned aerial vehicles (UAV) to solve the tasks of live terrain surface screening, air incident spots and objects survey.
S. B. Stukalov   +3 more
doaj   +1 more source

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