PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-14:42:30
G01     320.5          13.1                5.3 +/-    1.17      13.7 +/-    1.17  0.140 / 0.390
G08     265.3          15.7                7.3 +/-    2.32      17.7 +/-    2.32  0.120 / 0.300
G10     69.9           56.5                3.4 +/-    0.96       4.0 +/-    0.96  0.050 / 0.050
G11     309.9          18.0                6.6 +/-    1.69      15.2 +/-    1.69  0.050 / 0.050
G14     276.8          67.5                5.0 +/-    0.40       5.4 +/-    0.40  0.160 / 0.240
G27     227.2          12.1                5.3 +/-    5.67      14.1 +/-    5.67  0.130 / 0.250
G31     176.7          36.5                8.1 +/-    0.87      12.5 +/-    0.87  0.120 / 0.300
G32     356.8          70.9                4.9 +/-    0.70       5.2 +/-    0.70  0.130 / 0.290