3 THREE-DIMENSIONAL INTERPOLATION METHOD OF NUMERICAL WEATHER PREDICTION MODEL DATA IN NON-REGULAR GRID ONTO WEATHER OBSERVATION POINT AND HARDWARE DEVICE PERFORMING THE SAME

摘要

A method of three-dimensionally interpolating data of a numerical weather forecast model having an irregular grid with respect to a weather observation point includes a hardware unit including a calculation unit including a plurality of calculation units and a memory electrically connected to the calculation unit , And a data moving method for interpolating model data of a numerical weather forecast model calculated using the first coordinate system to a position of an observation point, wherein the first coordinate system is a latitude-longitude coordinate system. If the first coordinate system is not a latitude-longitude coordinate system, a virtual second coordinate system having a second grid resolution higher than the first grid resolution of the first coordinate system and corresponding to the latitude-longitude lattice is set. And converts the plurality of model grid points at which the model data is defined and the horizontal position of the observation point into coordinates in the virtual second coordinate system. An influence radius having a value larger than the lattice spacing of the model lattice points is set. And searches for four boundary lattice points included in the influence radius centering on the observation point and corresponding to model grid points converted into coordinates in the imaginary second coordinate system. The latitude, longitude, and vertical altitude of the boundary lattice points are read out. And interpolates the values of the boundary lattice points into a model value of the observation point based on a weight based on the three-dimensional Euclidean distance between the boundary lattice points and the observation point.