PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-11:57:30
G01     318.0          20.2                3.6 +/-    1.73       7.8 +/-    1.73  0.040 / 0.050
G08     259.8          11.7                5.3 +/-    2.10      14.1 +/-    2.10  0.040 / 0.050
G10     84.0           51.8                3.8 +/-    0.65       4.7 +/-    0.65  0.070 / 0.150
G11     302.3          22.9                3.4 +/-    1.06       7.0 +/-    1.06  0.060 / 0.140
G14     297.3          69.4                4.1 +/-    0.51       4.4 +/-    0.51  0.220 / 0.270
G18     302.6          41.4                4.6 +/-    1.32       6.5 +/-    1.32  0.180 / 0.250
G22     303.2          16.3                2.2 +/-    1.89       5.2 +/-    1.89  0.160 / 0.380
G25     99.6           9.7               -14.3 +/-   19.57     -40.2 +/-   19.57  0.150 / 0.420
G31     173.6          46.8                5.5 +/-    0.65       7.2 +/-    0.65  0.140 / 0.340
G32     15.7           64.4                3.8 +/-    0.61       4.2 +/-    0.61  0.330 / 0.320