PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-12:58:00
G01     38.1           10.4                4.9 +/-    8.10      13.5 +/-    8.10  0.120 / 0.200
G02     199.9          14.5                7.9 +/-    4.55      19.9 +/-    4.55  0.090 / 0.300
G06     174.4          46.4                6.9 +/-    1.04       9.2 +/-    1.04  0.100 / 0.160
G13     233.4          17.2                8.5 +/-    2.17      20.0 +/-    2.17  0.120 / 0.230
G17     18.7           62.6                4.8 +/-    1.60       5.3 +/-    1.60  0.110 / 0.150
G19     309.2          72.1                5.4 +/-    0.93       5.7 +/-    0.93  0.100 / 0.150
G24     314.4          23.8                3.9 +/-    0.98       7.9 +/-    0.98  0.040 / 0.030
G28     81.8           42.5                6.3 +/-    1.46       8.8 +/-    1.46  0.050 / 0.030
G30     156.5          21.1                5.6 +/-    1.95      12.0 +/-    1.95  0.090 / 0.210