PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-21:58:10
G01     46.3           22.5               11.4 +/-    1.73      23.7 +/-    1.73  0.140 / 0.120
G06     176.5          30.4               18.7 +/-    1.88      32.5 +/-    1.88  0.090 / 0.110
G11     44.1           12.2                9.2 +/-    1.81      24.4 +/-    1.81  0.090 / 0.160
G13     245.8          27.5               15.6 +/-    2.12      28.9 +/-    2.12  0.060 / 0.140
G15     278.9          14.8               11.2 +/-    1.63      28.1 +/-    1.63  0.090 / 0.150
G17     316.9          76.7               14.4 +/-    0.46      14.7 +/-    0.46  0.100 / 0.170
G19     255.1          62.9               15.3 +/-    0.69      17.0 +/-    0.69  0.070 / 0.080
G24     318.6          12.2               -9.4 +/-   33.11     -25.1 +/-   33.11  0.070 / 0.080
G28     60.3           50.6               12.8 +/-    0.89      16.1 +/-    0.89  0.240 / 0.350
G30     151.4          34.8               16.6 +/-    1.40      26.4 +/-    1.40  0.300 / 0.430