PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-10:58:00
G01     84.8           32.8                3.5 +/-    2.61       5.7 +/-    2.61  0.020 / 0.020
G07     129.5          40.9                5.7 +/-    0.60       8.2 +/-    0.60  0.020 / 0.030
G11     62.5           37.0                4.7 +/-    0.68       7.1 +/-    0.68  0.080 / 0.090
G13     288.9          37.4                1.3 +/-    0.83       2.0 +/-    0.83  0.060 / 0.130
G17     217.9          59.7                5.8 +/-    1.00       6.6 +/-    1.00  0.050 / 0.110
G18     58.1           22.1                2.7 +/-    2.13       5.7 +/-    2.13  0.070 / 0.100
G28     356.1          61.5                4.0 +/-    0.62       4.4 +/-    0.62  0.050 / 0.050
G30     115.6          74.3                5.6 +/-    0.79       5.8 +/-    0.79  0.050 / 0.060