PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-12:12:30
G02     28.7           58.7                4.2 +/-    0.66       4.9 +/-    0.66  0.040 / 0.050
G05     149.3          58.1                6.8 +/-    0.80       7.8 +/-    0.80  0.040 / 0.050
G06     51.7           18.8                1.5 +/-    1.95       3.3 +/-    1.95  0.050 / 0.130
G12     203.0          71.3                5.4 +/-    0.57       5.7 +/-    0.57  0.050 / 0.120
G19     96.4           13.9                3.8 +/-    1.37       9.6 +/-    1.37  0.030 / 0.040
G25     296.3          55.8                4.9 +/-    0.91       5.8 +/-    0.91  0.020 / 0.040
G29     305.4          26.2                2.8 +/-    1.93       5.3 +/-    1.93  0.030 / 0.030