PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-14:27:50
G01     76.7           33.0                7.5 +/-    0.52      12.4 +/-    0.52  0.070 / 0.090
G07     134.1          32.6                9.5 +/-    1.28      15.8 +/-    1.28  0.060 / 0.100
G11     56.5           31.5                8.0 +/-    0.73      13.6 +/-    0.73  0.080 / 0.100
G13     283.5          36.9                8.6 +/-    1.07      13.2 +/-    1.07  0.090 / 0.140
G15     309.5          12.7                6.5 +/-    1.88      17.1 +/-    1.88  0.030 / 0.030
G17     225.9          67.1                9.5 +/-    0.94      10.2 +/-    0.94  0.030 / 0.030
G19     220.6          39.2               11.1 +/-    2.08      16.3 +/-    2.08  0.030 / 0.050
G28     10.4           60.2                7.7 +/-    0.93       8.7 +/-    0.93  0.030 / 0.030
G30     127.0          69.1                7.9 +/-    0.60       8.4 +/-    0.60  0.070 / 0.090