PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-17:43:10
G02     201.6          16.5               15.6 +/-    1.72      37.5 +/-    1.72  0.200 / 0.120
G06     170.4          53.9               14.4 +/-    0.74      17.4 +/-    0.74  0.100 / 0.160
G13     229.0          13.5               11.3 +/-    3.02      29.1 +/-    3.02  0.090 / 0.430
G17     25.2           58.1               11.7 +/-    1.21      13.5 +/-    1.21  0.090 / 0.490
G19     329.6          71.4               11.4 +/-    0.73      11.9 +/-    0.73  0.090 / 0.180
G28     87.9           39.8               12.3 +/-    0.88      17.9 +/-    0.88  0.120 / 0.150
G30     157.7          17.1               12.2 +/-    1.71      28.8 +/-    1.71  0.030 / 0.040