PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-10:27:40
G05     50.0           13.7                0.7 +/-    0.59       1.8 +/-    0.59  0.080 / 0.150
G10     237.8          13.8                4.8 +/-    4.90      12.4 +/-    4.90  0.050 / 0.130
G13     73.4           36.7                3.6 +/-    0.73       5.5 +/-    0.73  0.040 / 0.080
G15     117.3          53.8                6.7 +/-    1.05       8.1 +/-    1.05  0.060 / 0.070
G16     313.3          12.4                2.0 +/-    3.35       5.4 +/-    3.35  0.040 / 0.050
G20     20.7           69.2                3.3 +/-    0.93       3.5 +/-    0.93  0.050 / 0.060
G21     317.4          50.5                3.1 +/-    1.45       3.9 +/-    1.45  0.090 / 0.280
G26     285.0          20.1                4.5 +/-    2.76      10.0 +/-    2.76  0.130 / 0.300
G29     156.5          67.7                4.6 +/-    0.98       5.0 +/-    0.98  0.040 / 0.120