PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-11:13:00
G07     332.1          57.6                1.6 +/-    1.27       1.8 +/-    1.27  0.070 / 0.110
G08     102.0          50.2                2.0 +/-    1.37       2.6 +/-    1.37  0.080 / 0.110
G09     188.2          75.8                2.8 +/-    1.31       2.8 +/-    1.31  0.030 / 0.060
G11     145.9          10.7               -1.5 +/-   16.48      -4.0 +/-   16.48  0.030 / 0.050
G16     45.5           11.9                1.9 +/-    3.03       5.0 +/-    3.03  0.030 / 0.060
G23     154.4          47.5                5.6 +/-    1.22       7.3 +/-    1.22  0.030 / 0.060
G27     58.0           32.6                2.5 +/-    0.63       4.2 +/-    0.63  0.060 / 0.090
G28     234.6          26.7              -14.7 +/-   58.62     -27.7 +/-   58.62  0.060 / 0.090
G30     297.7          30.7                2.5 +/-    1.26       4.4 +/-    1.26  0.170 / 0.350