PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-10:28:00
G08     278.2          19.6                5.3 +/-    0.83      11.9 +/-    0.83  0.040 / 0.060
G10     48.0           60.9                5.6 +/-    0.92       6.3 +/-    0.92  0.050 / 0.060
G11     316.5          11.3               -0.6 +/-   16.76      -1.7 +/-   16.76  0.210 / 0.230
G14     251.0          58.3                6.2 +/-    0.96       7.1 +/-    0.96  0.540 / 0.480
G18     315.4          25.2                4.9 +/-    1.65       9.4 +/-    1.65  0.530 / 0.400
G21     153.3          21.4                4.4 +/-    2.29       9.4 +/-    2.29  0.380 / 0.540
G24     42.7           14.8                2.8 +/-    3.32       6.9 +/-    3.32  0.080 / 0.150
G27     236.3          20.1                6.3 +/-    3.10      13.8 +/-    3.10  0.100 / 0.200
G31     178.3          25.3                3.0 +/-    1.72       5.9 +/-    1.72  0.380 / 0.200
G32     319.5          76.4                8.5 +/-    0.63       8.7 +/-    0.63  0.310 / 0.410