PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-07:57:50
G02     22.8           64.5                2.2 +/-    0.84       2.4 +/-    0.84  0.030 / 0.030
G05     153.8          50.1                7.6 +/-    0.94       9.5 +/-    0.94  0.030 / 0.030
G06     46.4           29.4                0.4 +/-    0.66       0.6 +/-    0.66  0.030 / 0.040
G12     250.1          78.8                3.7 +/-    0.48       3.7 +/-    0.48  0.030 / 0.050
G19     89.6           17.3                5.4 +/-    1.83      12.7 +/-    1.83  0.050 / 0.080
G20     199.6          10.0               -8.8 +/-    7.98     -24.7 +/-    7.98  0.060 / 0.070
G24     217.9          12.0                3.5 +/-    2.01       9.4 +/-    2.01  0.100 / 0.370
G25     311.3          42.8                3.2 +/-    1.81       4.4 +/-    1.81  0.120 / 0.330
G29     298.8          20.5                3.5 +/-    2.39       7.7 +/-    2.39  0.070 / 0.230