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q |
We need to know rij and rgi in
order to solve the N linear
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equation for the N Ps.
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è But we don’t data at grid points (can not calculated
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rgi !).
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q |
It is typical to assume that correlations between points
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depend only on the distance between them and not on
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location or direction.
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q |
So we calculate the rij from station data and
obtain rgi from
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rij based on the distance between the grid points and the
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stations.
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