PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-14:42:40
G01     109.2          24.1               10.2 +/-    1.03      20.4 +/-    1.03  0.150 / 0.220
G07     104.9          56.5               11.0 +/-    0.44      12.9 +/-    0.44  0.150 / 0.220
G08     42.0           20.7                7.8 +/-    2.09      16.9 +/-    2.09  0.040 / 0.030
G09     174.3          14.8                8.1 +/-    1.29      20.2 +/-    1.29  0.030 / 0.030
G11     89.4           40.4               10.6 +/-    1.07      15.3 +/-    1.07  0.070 / 0.200
G13     312.8          25.3                7.1 +/-    1.33      13.9 +/-    1.33  0.100 / 0.210
G17     204.2          37.6               11.9 +/-    0.95      18.0 +/-    0.95  0.030 / 0.030
G19     208.1          12.2                5.4 +/-    8.65      14.3 +/-    8.65  0.040 / 0.020
G28     312.8          60.3                9.1 +/-    0.72      10.3 +/-    0.72  0.060 / 0.080
G30     3.6            75.0               10.0 +/-    0.73      10.3 +/-    0.73  0.080 / 0.080