[R-sig-Geo] sill not reaching 1 in a climatological variogram

[subash]

Hi All,

I constructed a climatological variogram using 'gstat' package in R at daily
scale using 2 monsoon(JJAS) data. The *exponential* model was with variogram
parameters  

nugget - 0.04243
psill - 0.96633
Range - 16.88 Km

<http://r-sig-geo.2731867.n2.nabble.com/file/n7583465/climat_vario.png> 

I have couple of questions:

(1) Why is the psill not reaching 1, when the each day rain has been
normalized?
(2) Why is there a dip in the variogram at 50Km?

Your help will be highly appreciated.

Thanks & Regards
Subash







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