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The paper explores the possibility of estimating the horizontal scale of fluctuation (δh) with limited CPTs. The following conditions are desirable: (1) the CPT depth is large; (2) there are more than two CPTs; (3) the CPT separation distances are distinct and preferably less than 2 × δh; and (4) the Whittle-Matérn auto-correlation model is adopted.
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Ching et al. (2017) studied this question.
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