PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-14:28:00
G01     63.5           31.3                6.6 +/-    1.09      11.3 +/-    1.09  0.050 / 0.170
G06     181.1          12.1                9.8 +/-    4.94      26.2 +/-    4.94  0.070 / 0.130
G07     140.4          22.5               10.1 +/-    1.42      20.9 +/-    1.42  0.060 / 0.130
G11     49.1           23.7                4.2 +/-    0.63       8.4 +/-    0.63  0.050 / 0.140
G13     269.1          35.8                8.6 +/-    1.19      13.5 +/-    1.19  0.040 / 0.040
G15     299.5          15.3                3.9 +/-    2.09       9.7 +/-    2.09  0.030 / 0.040
G17     252.9          76.8                7.5 +/-    0.41       7.7 +/-    0.41  0.030 / 0.030
G19     229.8          49.8               10.6 +/-    1.07      13.3 +/-    1.07  0.020 / 0.040
G28     30.6           57.5                6.5 +/-    0.72       7.6 +/-    0.72  0.070 / 0.110
G30     140.7          57.8                8.2 +/-    0.87       9.5 +/-    0.87  0.060 / 0.100