PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-20:42:40
G02     8.3            70.8                7.4 +/-    0.68       7.7 +/-    0.68  0.030 / 0.020
G05     160.5          45.6               10.6 +/-    1.89      14.2 +/-    1.89  0.030 / 0.030
G06     46.9           27.4                5.3 +/-    7.43       9.8 +/-    7.43  0.150 / 0.310
G12     243.1          79.9                9.1 +/-    5.40       9.2 +/-    5.40  0.090 / 0.510
G19     88.8           17.1                7.1 +/-   22.08      16.7 +/-   22.08  0.030 / 0.060
G20     197.0          13.2               16.0 +/-    3.28      41.5 +/-    3.28  0.030 / 0.030
G24     219.6          13.5               10.9 +/-   16.09      28.1 +/-   16.09  0.060 / 0.070
G25     310.2          46.4                7.6 +/-    3.37      10.0 +/-    3.37  0.050 / 0.060
G29     297.3          18.8                9.7 +/-    2.97      22.1 +/-    2.97  0.050 / 0.040