PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-12:13:00
G05     49.0           16.2                2.9 +/-    3.08       7.1 +/-    3.08  0.100 / 0.260
G10     236.2          11.8               -2.0 +/-   24.32      -5.5 +/-   24.32  0.150 / 0.230
G13     76.8           37.0                4.4 +/-    0.78       6.7 +/-    0.78  0.130 / 0.210
G15     121.3          52.4                5.7 +/-    0.75       7.0 +/-    0.75  0.120 / 0.240
G18     246.6          44.7                5.2 +/-    2.27       7.0 +/-    2.27  0.030 / 0.040
G20     20.0           70.4                4.4 +/-    0.32       4.6 +/-    0.32  0.040 / 0.030
G21     316.1          49.9                1.7 +/-    0.96       2.2 +/-    0.96  0.040 / 0.060
G25     199.8          10.9                1.9 +/-    2.72       5.2 +/-    2.72  0.040 / 0.060
G26     288.4          20.1                2.1 +/-    1.69       4.6 +/-    1.69  0.100 / 0.330
G29     153.9          69.4                6.2 +/-    0.26       6.6 +/-    0.26  0.110 / 0.240