PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-16:42:50
G02     206.6          40.1               16.6 +/-    1.78      24.1 +/-    1.78  0.050 / 0.070
G06     140.5          76.6               16.2 +/-    0.72      16.6 +/-    0.72  0.060 / 0.090
G12     312.2          22.1               10.8 +/-    2.18      22.6 +/-    2.18  0.120 / 0.160
G17     45.6           41.2               14.0 +/-    0.83      20.0 +/-    0.83  0.090 / 0.160
G19     20.6           58.8               14.9 +/-    0.45      17.1 +/-    0.45  0.030 / 0.060
G24     290.6          40.3               12.5 +/-    0.98      18.1 +/-    0.98  0.030 / 0.060
G28     110.3          25.4               12.7 +/-    1.53      24.5 +/-    1.53  0.030 / 0.030