PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-10:27:50
G08     272.5          18.0                3.7 +/-    0.84       8.6 +/-    0.84  0.050 / 0.060
G10     59.0           59.0                3.3 +/-    0.44       3.8 +/-    0.44  0.050 / 0.060
G11     313.3          15.1                2.8 +/-    2.43       7.0 +/-    2.43  0.100 / 0.190
G14     260.4          62.1                4.1 +/-    0.27       4.5 +/-    0.27  0.090 / 0.170
G18     313.3          30.0                5.0 +/-    1.22       8.7 +/-    1.22  0.140 / 0.400
G21     154.4          16.1                4.0 +/-    0.91       9.8 +/-    0.91  0.180 / 0.430
G24     40.1           10.8                3.0 +/-    1.73       8.1 +/-    1.73  0.020 / 0.030
G27     232.0          16.3                4.7 +/-    1.81      11.3 +/-    1.81  0.030 / 0.030
G31     177.1          31.0                6.0 +/-    1.73      10.3 +/-    1.73  0.140 / 0.320
G32     341.7          74.2                4.1 +/-    0.70       4.2 +/-    0.70  0.140 / 0.320