PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-14:27:40
G01     288.2          40.6                1.2 +/-    1.57       1.8 +/-    1.57  0.050 / 0.050
G03     313.4          22.8                4.1 +/-    1.81       8.3 +/-    1.81  0.050 / 0.050
G10     121.3          27.3                7.4 +/-    1.29      13.7 +/-    1.29  0.110 / 0.130
G11     265.8          25.0                5.6 +/-    5.10      10.8 +/-    5.10  0.150 / 0.130
G14     23.1           59.2                6.9 +/-    0.52       7.9 +/-    0.52  0.020 / 0.020
G22     314.7          43.4                6.2 +/-    0.68       8.6 +/-    0.68  0.030 / 0.020
G25     65.5           19.2                5.6 +/-    0.92      12.6 +/-    0.92  0.040 / 0.050
G26     154.3          15.5               10.7 +/-    3.10      26.3 +/-    3.10  0.040 / 0.050
G31     107.3          79.4                7.3 +/-    0.30       7.4 +/-    0.30  0.060 / 0.080
G32     53.9           39.6                5.3 +/-    1.05       7.8 +/-    1.05  0.070 / 0.070