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Table 2

Number of mesh cells and corresponding computations times for solving the scalar wave equation, Eq. (4), with or without extending the computational domain above model S.

Outer radius rt N r Mesh cells Memory Comp. time

R + 4 Mm 33 10 749 6.6 GB 43 s
R + 500 km 38 6958 4.4 GB 28 s

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