#
# The covariance matrix has two terms:
#    1. Linearly decreasing, std. dev. 0.5 and correlation length 0.2
#    2. Gaussian, std. dev. 0.15, correlation length 0.3 and cut-off at 0.1
#
# The correlation lengths are given in decades (1 decade is about 16 km).
#
3       
2 2     
1 3     
0 0.1     
2 3     
 6  0.5  0.2
-4  0.5  0.2
2 3     
 6  0.15  0.3
-4  0.15  0.3 