PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-16:57:30
G02     204.5          34.6               12.9 +/-    1.61      20.6 +/-    1.61  0.110 / 0.220
G06     150.3          72.1               12.1 +/-    0.69      12.7 +/-    0.69  0.150 / 0.270
G12     309.7          20.1               12.9 +/-    1.79      28.3 +/-    1.79  0.060 / 0.120
G17     38.1           47.5               11.0 +/-    0.34      14.3 +/-    0.34  0.080 / 0.180
G19     357.6          65.5               10.6 +/-    0.70      11.6 +/-    0.70  0.070 / 0.110
G24     294.5          39.9               11.4 +/-    2.01      16.6 +/-    2.01  0.060 / 0.110
G28     104.1          30.1               12.1 +/-    0.61      21.2 +/-    0.61  0.060 / 0.080