PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-09:58:10
G05     49.9           13.7                2.4 +/-    1.69       6.0 +/-    1.69  0.180 / 0.180
G10     237.7          13.7                4.1 +/-    3.43      10.4 +/-    3.43  0.140 / 0.210
G13     73.6           36.7                6.7 +/-    0.92      10.4 +/-    0.92  0.130 / 0.280
G15     117.6          53.7                7.0 +/-    0.57       8.4 +/-    0.57  0.240 / 0.290
G16     313.2          12.4                2.7 +/-    1.61       7.0 +/-    1.61  0.030 / 0.030
G20     19.8           69.7                3.8 +/-    0.36       4.0 +/-    0.36  0.040 / 0.050
G21     317.0          50.1                3.3 +/-    0.84       4.2 +/-    0.84  0.060 / 0.050
G26     285.0          20.2                5.0 +/-    3.10      10.9 +/-    3.10  0.050 / 0.050
G29     156.5          68.1                6.5 +/-    0.85       6.9 +/-    0.85  0.110 / 0.320