PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-11:27:40
G01     229.3          19.8                5.3 +/-    1.04      11.7 +/-    1.04  0.060 / 0.140
G03     294.5          66.0                2.3 +/-    0.78       2.4 +/-    0.78  0.060 / 0.130
G14     81.1           30.2                3.9 +/-    1.15       6.8 +/-    1.15  0.090 / 0.190
G16     147.5          42.3                5.7 +/-    1.18       8.0 +/-    1.18  0.110 / 0.170
G18     206.2          9.9                 2.2 +/-   19.95       6.1 +/-   19.95  0.030 / 0.040
G22     215.2          72.5                4.1 +/-    1.15       4.3 +/-    1.15  0.030 / 0.040
G23     306.5          37.7                1.8 +/-    1.15       2.7 +/-    1.15  0.030 / 0.040
G26     100.9          52.9                4.7 +/-    0.66       5.8 +/-    0.66  0.030 / 0.050
G31     44.5           33.4                1.5 +/-    0.69       2.4 +/-    0.69  0.060 / 0.100