Spectral Grid
A Gaussian grid is used in the earth sciences as a gridded horizontal coordinate system for scientific modeling on a sphere (i.e., the approximate shape of the Earth). The grid is rectangular, with a set number of orthogonal coordinates (usually latitude and longitude). At a given latitude (or ''parallel''), the gridpoints are ''equally'' spaced. On the contrary along a longitude (or ''meridian'') the gridpoints are ''unequally'' spaced. The spacing between grid points is defined by Gaussian quadrature. By contrast, in the "normal" geographic Geographic_coordinate_system#Geographic_latitude_and_longitude, latitude-longitude grid, gridpoints are equally spaced along both latitudes and longitudes. Gaussian grids also have no grid points at the geographical pole, poles. In a ''regular'' Gaussian grid, the number of gridpoints along the longitudes is constant, usually double the number along the latitudes. In a ''reduced'' (or ''thinned'') Gaussian grid, the number of gridpoints in ...
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NCEP T62 Gaussian Grid
NCEP may refer to: * National Cholesterol Education Program * National Centers for Environmental Prediction The United States National Centers for Environmental Prediction (NCEP) delivers national and global weather, water, climate, and space weather guidance, forecasts, warnings, and analyses to government agencies and private users. The centers f ...