PPT Slide

• The solution found corresponds to:

• dt=LS

• dt =observed - theoretical time

• L=matrix of path length elements

• S=block slowness matrx

• S(k+1) =S(k) +W-1LT [LW-1 LT + eE-1]-1 (dt)

• W is block weight

• E is travel time uncertainty

• An iterative solution is found by approximating the inverses with the inverse of their diagonals.

• Where

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