PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-16:43:10
G01     40.8           15.5                7.9 +/-    0.89      19.5 +/-    0.89  0.140 / 0.270
G06     174.5          40.3               12.5 +/-    1.10      18.1 +/-    1.10  0.150 / 0.350
G13     238.9          21.7               11.7 +/-    3.41      24.7 +/-    3.41  0.030 / 0.030
G15     273.6          12.0               12.7 +/-    1.54      34.0 +/-    1.54  0.030 / 0.040
G17     9.5            68.1               11.9 +/-    0.95      12.7 +/-    0.95  0.130 / 0.210
G19     285.3          71.1               12.2 +/-    0.89      12.8 +/-    0.89  0.140 / 0.220
G24     317.1          18.3               12.8 +/-    2.92      29.3 +/-    2.92  0.060 / 0.150
G28     72.9           46.4                9.6 +/-    0.66      12.7 +/-    0.66  0.080 / 0.120
G30     155.2          29.0               10.4 +/-    1.15      18.6 +/-    1.15  0.110 / 0.340