Representation of Topography in Spectral Models,
AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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Various ways of representing topography that is a part of a global spectral model have been examined using the notions of error-in-synthesis and error-in-reproduction in measuring accuracy and fidelity. The trapezoidal and Gauss-Legendre quadratures are employed in conjuction with different truncations in the numerical computation of the transformations. The results have led to the following conclusions 1 The model terrain is best defined by the set of spectral coefficients in a truncation range tahat is commensurate with the model resolution 2 The model terrain in the real domain should be defined on the Gaussian latitudes as the transform of the spectral coefficients using the Gauss-Legendre quadrature 3 Smoothing by aspectral truncation alone is not suffiecient to insure the accuracy either in synthesis or in reproduction. Originator-supplied keyword Global circulation model.
- Cartography and Aerial Photography
- Numerical Mathematics