Non‐Cartesian k‐space trajectory calculation based on concurrent reading of the gradient amplifiers’ output currents

2021 ◽  
Vol 85 (6) ◽  
pp. 3060-3070
Author(s):  
Jürgen Rahmer ◽  
Ingo Schmale ◽  
Peter Mazurkewitz ◽  
Oliver Lips ◽  
Peter Börnert
Keyword(s):  
Trajectory Calculation

Impact of Consistent Semi-Lagrangian Trajectory Calculations on Numerical Weather Prediction Performance

2017 ◽  
Vol 145 (10) ◽  
pp. 4127-4150 ◽  
Author(s):  
Syed Zahid Husain ◽  
Claude Girard
Keyword(s):  
Numerical Weather Prediction ◽  
Numerical Experiments ◽  
Prediction Models ◽  
Weather Prediction ◽  
Forecast Accuracy ◽  
Multiscale Model ◽  
Dynamical Equations ◽  
Numerical Weather ◽  
Trajectory Calculation ◽  
Trajectory Calculations

Inconsistencies may arise in numerical weather prediction models—that are based on semi-Lagrangian advection—when the governing dynamical and the kinematic trajectory equations are discretized in a dissimilar manner. This study presents consistent trajectory calculation approaches, both in the presence and absence of off-centering in the discretized dynamical equations. Both uniform and differential off-centering in the discretized dynamical equations have been considered. The proposed consistent trajectory calculations are evaluated using numerical experiments involving a nonhydrostatic two-dimensional theoretical mountain case and hydrostatic global forecasts. The experiments are carried out using the Global Environmental Multiscale model. Both the choice of the averaging method for approximating the velocity integral in the discretized trajectory equations and the interpolation scheme for calculating the departure positions are found to be important for consistent trajectory calculations. Results from the numerical experiments confirm that the proposed consistent trajectory calculation approaches not only improve numerical consistency, but also improve forecast accuracy.

scholarly journals Two-Dimensional Trajectory Calculation on Eley-Rideal Reaction.

Hyomen Kagaku ◽  
1997 ◽  
Vol 18 (11) ◽  
pp. 700-701
Author(s):  
Kazutaka G. NAKAMURA ◽  
Masahiro KITAJIMA
Keyword(s):  
Two Dimensional ◽  
Trajectory Calculation

scholarly journals The task of trajectory calculation with the homogenous distribution of results

2014 ◽  
Vol 6 (5) ◽  
pp. 803-828 ◽  
Author(s):  
A. V. Koganov ◽  
Andrey I. Zlobin ◽  
Tatyana Anatol'evna Rakcheeva
Keyword(s):  
Trajectory Calculation ◽  
Homogenous Distribution

Application of the fast expansion method for spacecraft trajectory calculation

2015 ◽  
Vol 58 (2) ◽  
pp. 180-186 ◽  
Author(s):  
A. D. Chernyshov ◽  
V. V. Goryainov ◽  
O. A. Chernyshov
Keyword(s):  
Expansion Method ◽  
Trajectory Calculation ◽  
Spacecraft Trajectory

Cl+HD reaction dynamics from quasiclassical trajectory calculation on a new ab initio potential energy surface

2001 ◽  
Vol 272 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Changsheng Shen ◽  
Tao Wu ◽  
Guanzhi Ju ◽  
Wensheng Bian
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Ab Initio ◽  
Energy Surface ◽  
Reaction Dynamics ◽  
Trajectory Calculation ◽  
Quasiclassical Trajectory Calculation
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