PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-19:12:40
G02     89.0           11.6                8.7 +/-    2.08      23.5 +/-    2.08  0.050 / 0.100
G05     45.8           27.5                5.2 +/-    1.05       9.5 +/-    1.05  0.080 / 0.120
G13     87.7           35.6                8.6 +/-    0.64      13.5 +/-    0.64  0.050 / 0.080
G15     143.7          43.6                9.6 +/-    0.43      13.2 +/-    0.43  0.060 / 0.090
G20     240.2          29.5                7.2 +/-    1.31      12.8 +/-    1.31  0.120 / 0.330
G21     304.6          41.0                7.6 +/-    1.16      10.9 +/-    1.16  0.120 / 0.230
G25     202.4          17.4                9.7 +/-    2.41      22.7 +/-    2.41  0.080 / 0.120
G26     296.9          20.2                7.7 +/-    1.98      16.9 +/-    1.98  0.070 / 0.140
G29     137.6          83.7                7.9 +/-    0.71       7.9 +/-    0.71  0.040 / 0.050