PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-07:42:30
G10     248.1          24.3                6.9 +/-    0.97      13.7 +/-    0.97  0.110 / 0.360
G13     56.7           31.9                5.4 +/-    1.56       9.1 +/-    1.56  0.140 / 0.340
G15     90.6           57.2                7.1 +/-    1.75       8.3 +/-    1.75  0.030 / 0.040
G16     298.7          15.3                2.6 +/-    2.00       6.4 +/-    2.00  0.030 / 0.040
G20     8.5            69.5                4.3 +/-    0.38       4.6 +/-    0.38  0.030 / 0.040
G21     330.9          58.6                4.9 +/-    0.93       5.6 +/-    0.93  0.030 / 0.030
G26     269.7          16.8                7.1 +/-    1.48      16.9 +/-    1.48  0.100 / 0.110
G29     163.9          53.0                7.7 +/-    0.46       9.4 +/-    0.46  0.100 / 0.130