Exponential model

1976

1991

2000

2005

2011

2015

Sill

0.0015

0.0012

0.0007

0.0011

0.0008

0.0010

Range (m)

742.5

762.5

797.9

1030.7

1079.1

1101

Root-mean-square (RMS)

0.031

0.038

0.017

0.017

0.028

0.023

Average standard error

0.062

0.056

0.016

0.060

0.063

0.054

Mean standardized

0.041

0.033

0.021

0.027

0.007

0.015

Root-mean-square-standardized

0.591

0.681

0.657

0.613

0.672

0.651