PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-14:27:50
G01     46.5           22.3                6.6 +/-    0.74      13.7 +/-    0.74  0.200 / 0.350
G06     177.1          29.6               11.2 +/-    2.14      19.8 +/-    2.14  0.080 / 0.230
G13     248.1          27.7                9.2 +/-    2.11      16.8 +/-    2.11  0.100 / 0.240
G15     281.4          14.7                8.4 +/-    1.15      20.9 +/-    1.15  0.060 / 0.080
G17     347.3          75.7                8.5 +/-    0.58       8.7 +/-    0.58  0.060 / 0.100
G19     257.8          65.7                7.4 +/-    0.84       8.1 +/-    0.84  0.030 / 0.030
G24     319.1          10.4              -16.7 +/-   20.89     -46.3 +/-   20.89  0.020 / 0.030
G28     59.8           50.7                8.6 +/-    0.81      10.7 +/-    0.81  0.060 / 0.160
G30     151.8          38.4                9.8 +/-    0.67      14.7 +/-    0.67  0.050 / 0.140