PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-08:28:00
G05     52.0           9.5                 1.8 +/-    3.26       5.1 +/-    3.26  0.070 / 0.300
G10     241.2          17.5                7.0 +/-    0.99      16.5 +/-    0.99  0.070 / 0.350
G13     67.0           35.6                6.1 +/-    1.03       9.6 +/-    1.03  0.050 / 0.060
G15     108.8          55.9                8.4 +/-    1.01       9.9 +/-    1.01  0.070 / 0.060
G16     307.9          14.2                3.3 +/-    2.89       8.4 +/-    2.89  0.130 / 0.330
G20     13.1           70.5                4.8 +/-    0.55       5.1 +/-    0.55  0.160 / 0.260
G21     321.3          52.8                5.0 +/-    0.75       6.1 +/-    0.75  0.040 / 0.030
G26     279.2          19.5                6.3 +/-    1.52      14.0 +/-    1.52  0.050 / 0.030
G29     160.0          63.1                7.7 +/-    0.53       8.5 +/-    0.53  0.100 / 0.160