PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-17:27:30
G02     202.5          28.1               11.7 +/-    1.41      21.4 +/-    1.41  0.090 / 0.120
G06     161.6          65.2               11.8 +/-    0.79      12.8 +/-    0.79  0.080 / 0.160
G12     305.8          14.5                8.0 +/-    1.51      20.2 +/-    1.51  0.070 / 0.100
G17     31.2           53.0               11.3 +/-    0.65      13.8 +/-    0.65  0.070 / 0.100
G19     341.1          68.5               12.3 +/-    0.91      13.1 +/-    0.91  0.080 / 0.350
G24     301.9          36.4               11.2 +/-    1.42      17.4 +/-    1.42  0.170 / 0.390
G28     97.5           34.4               10.9 +/-    0.72      17.5 +/-    0.72  0.060 / 0.040