Fig. 5From: Troposphere delay modeling in SLR based on PMF, VMF3o, and meteorological dataComparison of PMF and VMF3o Horizontal gradients projected onto \(10^{\circ }\) elevation angle for selected stations: Herstmonceux, Mt Stromlo, Graz and Yarragadee. O1 denotes the linear gradients from PMF; O2 denotes the higher-order gradient terms in PMFBack to article page