PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-10:27:50
G10     247.1          23.2                5.4 +/-    1.77      10.9 +/-    1.77  0.030 / 0.050
G13     58.2           32.7                4.1 +/-    0.65       6.8 +/-    0.65  0.030 / 0.050
G15     92.3           57.1                5.8 +/-    0.46       6.7 +/-    0.46  0.090 / 0.390
G16     301.1          14.8                1.5 +/-    3.41       3.7 +/-    3.41  0.130 / 0.310
G20     34.0           57.9                4.1 +/-    0.66       4.8 +/-    0.66  0.040 / 0.060
G21     331.2          58.8                2.6 +/-    0.84       3.0 +/-    0.84  0.040 / 0.040
G26     271.9          17.1                5.1 +/-    1.29      12.0 +/-    1.29  0.110 / 0.140
G29     162.8          53.2                6.8 +/-    0.51       8.2 +/-    0.51  0.110 / 0.160