PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-15:27:50
G02     246.6          74.0                8.4 +/-    0.61       8.7 +/-    0.61  0.180 / 0.200
G05     172.3          17.6               11.9 +/-    1.43      27.7 +/-    1.43  0.130 / 0.170
G06     40.2           53.6                8.1 +/-    0.52       9.8 +/-    0.52  0.030 / 0.030
G12     322.2          59.3                6.8 +/-    0.79       7.8 +/-    0.79  0.030 / 0.030
G17     74.5           19.0                7.6 +/-    0.87      17.2 +/-    0.87  0.210 / 0.350
G19     57.0           40.3                7.9 +/-    1.35      11.4 +/-    1.35  0.440 / 0.250
G24     238.8          32.3                9.2 +/-    1.90      15.3 +/-    1.90  0.030 / 0.030
G25     317.1          17.1                4.8 +/-    3.00      11.4 +/-    3.00  0.030 / 0.030