PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-07:27:50
G01     252.2          35.9                6.4 +/-    1.86       9.9 +/-    1.86  0.070 / 0.090
G03     316.1          40.1                3.9 +/-    1.02       5.7 +/-    1.02  0.060 / 0.100
G11     235.6          13.7                5.9 +/-    1.62      15.0 +/-    1.62  0.080 / 0.090
G14     60.3           40.1                2.5 +/-    1.63       3.6 +/-    1.63  0.090 / 0.090
G16     164.3          16.7                5.3 +/-    3.49      12.7 +/-    3.49  0.140 / 0.270
G22     306.2          66.0                5.9 +/-    0.58       6.4 +/-    0.58  0.130 / 0.180
G23     285.0          17.4                7.3 +/-    2.25      17.2 +/-    2.25  0.030 / 0.040
G26     138.9          36.3                6.4 +/-    0.96      10.0 +/-    0.96  0.040 / 0.030
G31     40.9           60.0                4.0 +/-    0.60       4.5 +/-    0.60  0.200 / 0.490
G32     75.8           24.4                4.2 +/-    1.28       8.3 +/-    1.28  0.200 / 0.340