3, which was calculated on the basis of a 2[degrees] x 3[degrees] grid system, 150% of the typical grid separation of 250 km translates to an e-folding correlation distance
of approximately 0.
of >75 m on MDPE water pipes, to within 1 m accuracy and with a processing time of under 2 minutes.
ij] it is possible to define a constant correlation distance d and to assume that [rho] linearly varies from 1 to 0 as the distance between the two samples goes from 0 to d + 1.
In more details, these methods aim at estimating the correlation distance d according to the uncertainty propagation (11) derived in the previous section.
Moreover, the importance of the correlation distance
between two adjacent points of the spatial grid has been investigated.
As described by these equations, light scattering is pronounced when the correlation distance is in the range of the wavelength of visible light.
the correlation distance, would be larger than the wavelength of visible light.
where K is approximately constant for a given diffraction profile and A(L) and B(L) denote the cosine and sine Fourier coefficients, respectively, belonging to correlation distance L.
Second, the expressions for the line profiles are only reliable for relatively small correlation distance.
min]) and the other side represents an effective correlation distance, D (Fig.
The effective correlation distance, D, is obtained from combining Eq.
Figure 4 represents the Debye-Bueche plot for the PVC/DHP system, where the short-range correlation distance