A Geostatistical Investigation into the Effective Spatiotemporal Coverage of Road Weather Information Systems in Alberta, Canada

Table 1

Fitted model parameters for the spatiotemporal variogram. (a) Separable covariance model. (b) Product-sum covariance model. (c) Metric covariance model.

(a)

	Space		Time		Overall Sill [°C^2]	MSE [°C^2]
	Range []	Nugget [°C^2]	Range []	Nugget [°C^2]
November 2014	14.23	0.00	5.14	0.00	11.81	13.06
January 2015	20.73	0.00	6.90	0.00	13.70	13.48

(b)

	Space			Time			k	MSE [°C^2]
	Range [km]	Nugget [°C^2]	Sill [°C^2]	Range [h]	Nugget [°C^2]	Sill [°C^2]
November 2014	14.23	0.01	3.41	8.09	0.01	14.55	0.01	0.80
January 2015	20.73	0.01	5.17	14.50	0.01	19.87	0.01	0.60

(c)

	Range	Nugget [°C^2]	Sill [°C^2]	MSE [°C^2]
November 2014	532178	0.68	16.40	1.36
January 2015	640430	2.69	18.84	2.74

m = kilometre.
= hour.