Gaussian model

1976

1991

2000

2005

2011

2015

Sill

0.0023

0.0018

0.0021

0.0021

0.0024

0.0017

Range (m)

765.5

762.5

797.9

1030.7

1079.1

1101

Root-mean-square (RMS)

0.051

0.088

0.067

0.047

0.048

0.043

Average standard error

0.052

0.066

0.036

0.070

0.073

0.084

Mean standardized

0.044

0.043

0.041

0.057

0.047

0.045

Root-mean-square-standardized

1.690

1.721

0.457

0.513

0.72

0.451