PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-11:42:40
G01     228.3          19.9                4.8 +/-    1.70      10.6 +/-    1.70  0.040 / 0.030
G03     290.6          69.1                5.9 +/-    0.79       6.2 +/-    0.79  0.040 / 0.040
G14     83.0           26.2                5.4 +/-    1.83      10.2 +/-    1.83  0.090 / 0.180
G16     152.3          39.4                6.5 +/-    1.73       9.6 +/-    1.73  0.110 / 0.220
G22     216.4          72.4                7.5 +/-    0.53       7.9 +/-    0.53  0.110 / 0.240
G23     305.0          35.6                4.5 +/-    1.01       7.1 +/-    1.01  0.110 / 0.210
G26     107.9          53.4                6.1 +/-    0.84       7.4 +/-    0.84  0.040 / 0.040
G31     44.1           35.5                4.3 +/-    1.17       6.8 +/-    1.17  0.040 / 0.050
G32     94.8           11.6                4.6 +/-    1.00      12.3 +/-    1.00  0.060 / 0.080