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dispersion variance
Linear models with possibly singular dispersion (variance-covariance) matrix of the vector of disturbances have been considered in the literature since the late sixties.
      
This paper extends the concept of dispersion variance to the multivariate case where the change of support affects dispersion covariances and the matrix of correlation between attributes.
      
This includes spatial moments and dispersion variance σ2x(t) on a finite domain L, and temporal moments on a finite time scale T, e.g., the "mass variance" of arrival times σ2T (x).
      
However, the autocorrelated signal feeder variogram presents lower short term dispersion variance, a characteristic feature of Joppa operations.
      
The resulting dispersion variance between the different measurement scales support the interpretation, application and comparison of these porosity measurements.
      
The theoretical dispersion variance, computed from the variogram model, quantifies the spatial heterogeneity within a moderate resolution pixel.
      
The theoretical dispersion variance, computed from the variogram model, quantifies the intra-pixel spatial heterogeneity.
      
 

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