PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-13:13:00
G01     317.8          20.7                3.6 +/-    3.19       7.9 +/-    3.19  0.040 / 0.040
G08     258.3          11.4                5.0 +/-    3.67      13.6 +/-    3.67  0.040 / 0.040
G10     84.8           51.5                3.6 +/-    1.02       4.5 +/-    1.02  0.150 / 0.310
G11     302.1          22.8                4.0 +/-    0.77       8.1 +/-    0.77  0.240 / 0.440
G14     300.9          69.9                3.5 +/-    0.64       3.7 +/-    0.64  0.040 / 0.060
G22     303.2          15.7                1.8 +/-    0.83       4.4 +/-    0.83  0.030 / 0.070
G25     99.0           10.0               -5.8 +/-   30.34     -16.2 +/-   30.34  0.150 / 0.260
G31     173.8          47.2                6.4 +/-    0.58       8.4 +/-    0.58  0.170 / 0.250
G32     16.2           64.1                3.5 +/-    0.48       3.8 +/-    0.48  0.370 / 0.290