PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-05:13:10
G01     226.9          17.7               10.2 +/-    3.28      23.7 +/-    3.28  0.150 / 0.390
G03     292.8          65.0                3.5 +/-    0.63       3.8 +/-    0.63  0.160 / 0.430
G14     86.6           23.4                4.0 +/-    1.36       8.1 +/-    1.36  0.040 / 0.040
G16     151.3          42.8               10.1 +/-    0.60      14.1 +/-    0.60  0.040 / 0.050
G22     220.5          71.9                6.1 +/-    1.17       6.4 +/-    1.17  0.060 / 0.110
G23     305.6          35.1                5.6 +/-    0.73       9.0 +/-    0.73  0.060 / 0.110
G26     105.2          54.7                5.9 +/-    0.54       7.0 +/-    0.54  0.030 / 0.030
G31     43.9           35.3                3.3 +/-    1.09       5.2 +/-    1.09  0.030 / 0.040