PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-02:13:10
G02     19.0           66.7                8.9 +/-    0.56       9.6 +/-    0.56  0.030 / 0.030
G05     154.4          48.6               12.9 +/-    1.29      16.5 +/-    1.29  0.030 / 0.030
G06     46.5           27.8                8.6 +/-    2.03      15.8 +/-    2.03  0.030 / 0.060
G12     253.9          79.7               10.9 +/-    0.57      11.0 +/-    0.57  0.040 / 0.050
G19     87.2           19.7               10.9 +/-    1.07      24.1 +/-    1.07  0.050 / 0.110
G24     218.4          13.0               13.9 +/-    2.68      36.3 +/-    2.68  0.060 / 0.110
G25     312.6          40.8                9.7 +/-    2.63      14.0 +/-    2.63  0.180 / 0.440
G29     296.4          17.1                8.7 +/-    1.93      20.5 +/-    1.93  0.160 / 0.490