PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/29-13:27:50
G01     69.3           32.5                7.7 +/-    0.70      12.9 +/-    0.70  0.110 / 0.330
G07     137.9          27.3                7.7 +/-    0.81      14.3 +/-    0.81  0.110 / 0.230
G11     52.1           27.6                5.3 +/-    0.87       9.8 +/-    0.87  0.030 / 0.040
G13     275.6          36.7                9.2 +/-    1.00      14.2 +/-    1.00  0.040 / 0.040
G15     303.5          14.7                2.9 +/-    2.54       7.4 +/-    2.54  0.070 / 0.120
G17     237.7          72.8                8.8 +/-    0.82       9.2 +/-    0.82  0.050 / 0.120
G19     225.3          45.1               11.6 +/-    1.92      15.6 +/-    1.92  0.030 / 0.040
G28     22.0           58.8                7.1 +/-    0.32       8.2 +/-    0.32  0.030 / 0.030
G30     135.8          62.7                8.6 +/-    0.65       9.5 +/-    0.65  0.060 / 0.070