PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-02:28:00
G01     84.2           32.9                3.8 +/-    0.79       6.2 +/-    0.79  0.030 / 0.040
G07     129.8          41.2                5.2 +/-    0.98       7.4 +/-    0.98  0.030 / 0.050
G11     65.3           38.8                2.6 +/-    0.68       3.8 +/-    0.68  0.050 / 0.070
G13     289.6          36.7                4.0 +/-    0.91       6.2 +/-    0.91  0.040 / 0.050
G15     311.1          12.6                2.3 +/-    1.94       5.9 +/-    1.94  0.040 / 0.080
G17     219.0          57.8                6.2 +/-    0.66       7.1 +/-    0.66  0.030 / 0.060
G19     217.1          32.3                7.9 +/-    1.42      13.3 +/-    1.42  0.050 / 0.100
G28     0.4            61.1                2.5 +/-    0.69       2.8 +/-    0.69  0.050 / 0.090
G30     120.4          68.1                4.6 +/-    0.63       4.9 +/-    0.63  0.040 / 0.090