RT Journal Article SR Electronic(1) A1 Poletto, F. A1 Craglietto, A.YR 1991 T1 Orthogonalized noise subtraction JF , VO OP SP cp-42-00280 DO https://doi.org/10.3997/2214-4609.201411022 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201411022