PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-07:27:40
G10     247.1          23.4                5.3 +/-    1.57      10.8 +/-    1.57  0.110 / 0.320
G13     57.9           32.5                5.0 +/-    1.99       8.4 +/-    1.99  0.120 / 0.270
G15     93.2           57.3                6.4 +/-    1.23       7.4 +/-    1.23  0.040 / 0.040
G16     299.8          15.3                2.0 +/-    1.71       4.8 +/-    1.71  0.040 / 0.040
G20     0.8            71.2                4.5 +/-    0.61       4.7 +/-    0.61  0.040 / 0.050
G21     329.4          57.7                4.7 +/-    0.61       5.5 +/-    0.61  0.030 / 0.040
G26     270.9          17.2                5.2 +/-    1.66      12.3 +/-    1.66  0.090 / 0.100
G29     163.5          54.4                6.0 +/-    0.40       7.2 +/-    0.40  0.070 / 0.110