PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-14:27:40
G01     74.4           33.0                7.5 +/-    0.66      12.4 +/-    0.66  0.110 / 0.190
G07     135.3          30.9                8.1 +/-    1.67      13.9 +/-    1.67  0.090 / 0.160
G11     55.0           30.3                6.3 +/-    1.83      11.0 +/-    1.83  0.070 / 0.080
G13     281.1          36.9                6.3 +/-    1.78       9.7 +/-    1.78  0.090 / 0.080
G15     307.9          13.3                4.1 +/-    1.57      10.6 +/-    1.57  0.070 / 0.090
G17     228.9          68.9                7.7 +/-    0.64       8.2 +/-    0.64  0.070 / 0.100
G19     221.9          41.0                9.9 +/-    1.96      14.2 +/-    1.96  0.030 / 0.020
G28     13.9           59.8                8.1 +/-    0.93       9.2 +/-    0.93  0.040 / 0.030
G30     130.0          67.3                8.7 +/-    0.43       9.4 +/-    0.43  0.030 / 0.030