PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-11:12:50
G01     316.4          23.2                3.0 +/-    3.04       6.1 +/-    3.04  0.040 / 0.060
G10     89.3           49.6                3.7 +/-    0.44       4.7 +/-    0.44  0.040 / 0.050
G11     298.5          24.6                3.8 +/-    1.47       7.4 +/-    1.47  0.120 / 0.490
G14     307.1          69.8                2.9 +/-    0.85       3.1 +/-    0.85  0.110 / 0.370
G18     298.5          43.8                4.3 +/-    1.28       5.9 +/-    1.28  0.130 / 0.160
G22     305.2          19.8                3.4 +/-    1.60       7.5 +/-    1.60  0.120 / 0.150
G25     96.2           11.4                1.8 +/-    2.22       4.9 +/-    2.22  0.090 / 0.220
G31     172.1          51.1                5.2 +/-    1.18       6.5 +/-    1.18  0.090 / 0.240
G32     21.5           61.5                3.4 +/-    0.65       3.8 +/-    0.65  0.030 / 0.050