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                5.6 +/-    2.60      12.4 +/-    2.60  0.080 / 0.150
G03     294.5          66.0                3.8 +/-    0.56       4.1 +/-    0.56  0.120 / 0.110
G14     81.1           30.2                4.0 +/-    1.26       7.0 +/-    1.26  0.270 / 0.490
G16     147.5          42.3                4.9 +/-    1.31       6.9 +/-    1.31  0.310 / 0.400
G22     215.2          72.5                4.2 +/-    0.30       4.3 +/-    0.30  0.030 / 0.020
G23     306.5          37.7                2.9 +/-    1.23       4.3 +/-    1.23  0.030 / 0.030
G26     100.9          52.9                4.0 +/-    0.37       4.9 +/-    0.37  0.080 / 0.070
G31     44.5           33.4                2.5 +/-    0.62       4.1 +/-    0.62  0.050 / 0.070