PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-09:12:40
G01     312.6          28.3                3.8 +/-    1.47       7.0 +/-    1.47  0.040 / 0.050
G10     98.1           45.0                6.2 +/-    0.57       8.4 +/-    0.57  0.040 / 0.050
G11     290.7          26.9                2.6 +/-    1.59       4.9 +/-    1.59  0.090 / 0.130
G14     324.7          69.5                4.1 +/-    0.56       4.3 +/-    0.56  0.080 / 0.090
G18     289.4          47.4                8.2 +/-    7.48      10.8 +/-    7.48  0.090 / 0.120
G22     307.9          23.9                4.5 +/-    1.42       9.1 +/-    1.42  0.080 / 0.120
G25     89.7           14.2                3.4 +/-    1.63       8.7 +/-    1.63  0.170 / 0.330
G31     168.2          59.0                5.9 +/-    0.78       6.7 +/-    0.78  0.190 / 0.330
G32     30.4           56.2                4.4 +/-    1.05       5.2 +/-    1.05  0.070 / 0.200