PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-13:42:40
G03     217.7          62.0                8.7 +/-    1.63       9.7 +/-    1.63  0.110 / 0.280
G07     253.1          11.6                1.0 +/-   15.94       2.7 +/-   15.94  0.120 / 0.240
G09     307.7          24.0                6.4 +/-    1.85      12.8 +/-    1.85  0.050 / 0.070
G14     104.6          13.2                7.5 +/-    2.20      19.5 +/-    2.20  0.040 / 0.060
G16     105.1          63.2                8.1 +/-    0.40       9.0 +/-    0.40  0.120 / 0.230
G22     186.2          43.8                8.0 +/-    0.63      11.0 +/-    0.63  0.230 / 0.270
G23     330.8          59.6                6.4 +/-    0.67       7.3 +/-    0.67  0.040 / 0.040
G26     57.1           45.3                7.1 +/-    0.71       9.6 +/-    0.71  0.030 / 0.030
G31     57.1           11.9                6.1 +/-    1.37      16.4 +/-    1.37  0.040 / 0.050