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REPRESENTATION OF GRADIENTS OF A SCALAR FIELD ON THE SPHERE USING A 2D FOURIER EXPRESSION
2D Fourier series gradients representation coefficients D-functions spectral transfers
2016/1/18
Representation of data on the sphere is conventionally done using spherical harmonics. Making use of the Fourier series of the Legendre function in the SH representation results in a 2D Fourier expres...
Effects of gradients of the electron density on Earth-space communications
Electron density space
2015/9/14
This paper is a review of the main results achieved in the framework of COST 271 Action Working Group 4, under the activities of the Work Package 4.4. The first topic treated deals with the influence ...
OPTICAL AND SAR IMAGERY FOR MAPPING VEGETATION GRADIENTS INBRAZILIAN SAVANNAS: SYNERGY BETWEEN PIXEL-BASED AND OBJECT-BASED APPROACHES
Indeterminate boundaries SegSAR CART ALOS-PALSAR Landsat-TM Cerrado Biome
2014/6/12
The objectives of this study were (a) to evaluate the suitability of SAR imagery for discriminating savanna physiognomies, (b) to combine SAR and optical imagery for achieving improved accurac...