Tab. 7 Parameters of ground-level ozone maps

Linear regression model + interpolation of residuals 26th highest maximum daily 8-hour average AOT40 exposure index
rural areas urban background traffic rural areas urban background
c (constant) 114.05     12,883.20  
a1 (altitude) 0.01     3.00  
weight IDW 1 2 2 1 2
RMSE [µg.m-3] 4.9 8.8 10.5 2,471.1 2,834.3
relat. RMSE [%] 4 8 11 17 23