PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-14:57:50
G01     69.2           32.5                9.5 +/-    1.99      15.9 +/-    1.99  0.100 / 0.230
G07     137.9          26.8               11.1 +/-    1.18      20.9 +/-    1.18  0.070 / 0.260
G11     51.9           27.2                6.3 +/-    2.10      11.7 +/-    2.10  0.040 / 0.020
G13     275.4          36.7               10.9 +/-    0.83      16.8 +/-    0.83  0.030 / 0.030
G15     304.3          14.3                7.0 +/-    1.35      17.8 +/-    1.35  0.060 / 0.110
G17     237.7          72.8               12.6 +/-    0.64      13.1 +/-    0.64  0.060 / 0.100
G19     225.3          45.2               11.9 +/-    1.85      16.1 +/-    1.85  0.050 / 0.100
G28     21.8           58.8                8.4 +/-    2.64       9.7 +/-    2.64  0.050 / 0.090
G30     135.7          63.1               10.7 +/-    0.44      11.8 +/-    0.44  0.060 / 0.070