PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-10:27:50
G01     317.3          21.7                2.3 +/-    1.81       4.8 +/-    1.81  0.040 / 0.060
G08     256.8          10.8                3.4 +/-    2.46       9.3 +/-    2.46  0.040 / 0.050
G10     86.8           50.6                3.4 +/-    0.77       4.3 +/-    0.77  0.100 / 0.350
G11     300.0          24.1                4.2 +/-    2.13       8.3 +/-    2.13  0.100 / 0.360
G14     300.5          69.3                3.6 +/-    0.61       3.8 +/-    0.61  0.120 / 0.250
G18     300.5          42.7                4.9 +/-    0.84       6.8 +/-    0.84  0.110 / 0.240
G22     304.4          18.7                3.4 +/-    0.82       7.8 +/-    0.82  0.030 / 0.040
G25     97.9           10.5               -9.7 +/-   28.89     -26.8 +/-   28.89  0.030 / 0.040
G31     172.6          49.1                3.4 +/-    0.99       4.3 +/-    0.99  0.080 / 0.200
G32     19.0           62.8                1.8 +/-    0.91       2.0 +/-    0.91  0.080 / 0.240