PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-17:12:40
G01     40.7           15.3                6.9 +/-    1.02      17.0 +/-    1.02  0.080 / 0.260
G06     174.3          40.6               12.4 +/-    1.36      17.9 +/-    1.36  0.070 / 0.240
G13     238.7          21.5               11.5 +/-    2.79      24.5 +/-    2.79  0.100 / 0.120
G15     273.8          11.9               10.3 +/-    1.87      27.5 +/-    1.87  0.060 / 0.140
G17     9.7            68.0                9.7 +/-    0.79      10.4 +/-    0.79  0.030 / 0.030
G19     285.9          71.2               10.2 +/-    0.85      10.7 +/-    0.85  0.030 / 0.040
G24     317.0          18.5                9.9 +/-    1.62      22.5 +/-    1.62  0.110 / 0.270
G28     73.1           46.3                9.0 +/-    1.70      11.9 +/-    1.70  0.100 / 0.250
G30     155.2          28.9               11.2 +/-    1.82      20.0 +/-    1.82  0.130 / 0.290