PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-01:27:40
G01     129.2          9.9               -14.4 +/-   24.83     -40.1 +/-   24.83  0.090 / 0.070
G07     43.8           69.6                5.5 +/-    0.91       5.8 +/-    0.91  0.110 / 0.090
G08     53.4           42.7                5.1 +/-    1.24       7.1 +/-    1.24  0.220 / 0.430
G09     179.3          40.0                7.4 +/-    0.97      10.7 +/-    0.97  0.100 / 0.340
G11     123.2          32.9                7.6 +/-    1.47      12.5 +/-    1.47  0.030 / 0.040
G17     199.9          12.0                0.4 +/-   13.24       0.9 +/-   13.24  0.030 / 0.030
G23     160.5          10.0                5.9 +/-    4.07      16.4 +/-    4.07  0.050 / 0.030
G28     272.9          51.9                5.5 +/-    2.46       6.8 +/-    2.46  0.050 / 0.050
G30     334.5          60.8                3.1 +/-    0.63       3.5 +/-    0.63  0.130 / 0.280