PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-14:28:00
G02     338.9          78.2                3.9 +/-    0.89       3.9 +/-    0.89  0.060 / 0.110
G05     166.0          32.8                6.6 +/-    1.14      11.0 +/-    1.14  0.070 / 0.090
G06     41.6           38.3                4.1 +/-    0.61       6.1 +/-    0.61  0.120 / 0.190
G12     310.1          72.9                4.8 +/-    0.82       5.0 +/-    0.82  0.110 / 0.200
G17     85.5           12.4                6.3 +/-    2.12      16.7 +/-    2.12  0.120 / 0.300
G19     76.3           24.8                6.3 +/-    1.06      12.3 +/-    1.06  0.100 / 0.270
G24     229.0          22.2                7.1 +/-    1.59      14.8 +/-    1.59  0.030 / 0.030
G25     316.9          28.6                2.6 +/-    1.73       4.7 +/-    1.73  0.030 / 0.030