autocov_impo – CREST

private function autocov_impo(xi, xj, tau1, tau2, alpha, ang)

Note

Function that returns $\exp \left(\alpha \sqrt{\left(\frac{x}{\tau_1}\right)^2+ \left(\frac{y}{\tau_2}\right)^2} \right)$

Type	Intent		Name
real(kind=R8),	intent(in)	::	xi	$x$ coordinate
real(kind=R8),	intent(in)	::	xj	$y$ coordinate
real(kind=R8),	intent(in)	::	tau1	correlation length along $x$
real(kind=R8),	intent(in)	::	tau2	correlation length along $y$
real(kind=R8),	intent(in)	::	alpha	log(z) where z is often 0.2
real(kind=R8),	intent(in)	::	ang	angle (rad)

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