PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-10:43:10
G05     49.9           13.9                2.9 +/-    1.56       7.5 +/-    1.56  0.170 / 0.180
G10     237.7          13.6                1.1 +/-    2.02       2.9 +/-    2.02  0.220 / 0.210
G13     73.6           36.7                6.8 +/-    0.96      10.5 +/-    0.96  0.040 / 0.030
G15     117.5          53.7                7.8 +/-    0.67       9.5 +/-    0.67  0.050 / 0.050
G16     313.5          12.2                0.7 +/-    7.09       1.8 +/-    7.09  0.050 / 0.050
G20     20.9           69.2                3.7 +/-    0.43       4.0 +/-    0.43  0.030 / 0.060
G21     317.4          50.5                3.2 +/-    0.81       4.0 +/-    0.81  0.110 / 0.230
G26     285.3          20.1                3.0 +/-    2.40       6.6 +/-    2.40  0.130 / 0.260
G29     156.3          67.7                7.3 +/-    0.28       7.8 +/-    0.28  0.040 / 0.080