PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-10:13:10
G05     50.4           12.8                1.1 +/-    1.13       3.0 +/-    1.13  0.080 / 0.110
G10     238.5          14.6                4.8 +/-    3.27      11.9 +/-    3.27  0.080 / 0.130
G13     72.0           36.5                3.1 +/-    0.82       4.8 +/-    0.82  0.040 / 0.060
G15     115.5          54.3                5.8 +/-    0.61       7.0 +/-    0.61  0.050 / 0.050
G16     312.2          12.8                1.5 +/-    2.05       3.9 +/-    2.05  0.050 / 0.080
G20     21.7           68.4                2.8 +/-    0.73       3.0 +/-    0.73  0.070 / 0.080
G21     318.4          51.0                3.7 +/-    1.29       4.7 +/-    1.29  0.120 / 0.270
G26     283.8          20.0                4.5 +/-    1.18       9.8 +/-    1.18  0.130 / 0.280
G29     157.3          66.6                5.5 +/-    1.51       5.9 +/-    1.51  0.310 / 0.300