PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-16:58:00
G01     320.8          11.6               -2.5 +/-   28.81      -6.7 +/-   28.81  0.220 / 0.350
G08     265.6          16.6                8.8 +/-    3.52      21.0 +/-    3.52  0.150 / 0.400
G10     66.5           57.5                6.2 +/-    0.65       7.2 +/-    0.65  0.150 / 0.350
G11     310.4          17.8                6.4 +/-    2.18      14.9 +/-    2.18  0.150 / 0.350
G14     274.0          67.4                6.4 +/-    0.67       6.8 +/-    0.67  0.060 / 0.090
G18     96.2           32.1                7.7 +/-    0.44      12.9 +/-    0.44  0.040 / 0.090
G27     228.4          13.3                7.8 +/-   18.90      20.2 +/-   18.90  0.030 / 0.020
G31     178.0          33.6                8.2 +/-    1.66      13.4 +/-    1.66  0.020 / 0.030
G32     349.4          72.3                7.0 +/-    0.45       7.3 +/-    0.45  0.050 / 0.060