PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-06:42:50
G10     247.2          23.5                5.6 +/-    1.84      11.4 +/-    1.84  0.080 / 0.300
G13     57.9           32.4                4.6 +/-    2.10       7.7 +/-    2.10  0.100 / 0.260
G15     93.5           57.4                6.3 +/-    0.94       7.4 +/-    0.94  0.040 / 0.040
G16     299.6          15.4                1.8 +/-    1.32       4.4 +/-    1.32  0.040 / 0.040
G20     338.8          73.2                5.0 +/-    0.57       5.1 +/-    0.57  0.030 / 0.030
G21     329.0          57.5                3.2 +/-    0.54       3.7 +/-    0.54  0.040 / 0.040
G26     270.7          17.2                5.3 +/-    1.76      12.4 +/-    1.76  0.030 / 0.040
G29     163.7          54.7                5.5 +/-    0.47       6.6 +/-    0.47  0.030 / 0.050