PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-13:27:50
G01     127.8          11.0               -2.8 +/-   43.53      -7.6 +/-   43.53  0.030 / 0.050
G07     49.3           69.7                6.7 +/-    0.58       7.1 +/-    0.58  0.030 / 0.040
G08     51.0           39.9                6.9 +/-    0.48      10.1 +/-    0.48  0.050 / 0.080
G09     177.0          35.7                8.7 +/-    1.35      13.6 +/-    1.35  0.050 / 0.080
G11     118.8          34.7                8.0 +/-    0.58      12.8 +/-    0.58  0.090 / 0.100
G13     321.3          10.9               -4.0 +/-   20.47     -10.9 +/-   20.47  0.100 / 0.090
G17     199.8          13.8                5.6 +/-    4.14      14.2 +/-    4.14  0.030 / 0.040
G18     104.5          16.1                8.6 +/-    0.90      20.9 +/-    0.90  0.030 / 0.040
G28     274.5          52.3                8.0 +/-    1.17       9.8 +/-    1.17  0.050 / 0.100
G30     330.8          59.0                4.8 +/-    0.88       5.6 +/-    0.88  0.050 / 0.090