PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-18:12:50
G01     118.3          17.8               12.8 +/-    1.46      29.8 +/-    1.46  0.030 / 0.030
G07     90.8           60.8               11.7 +/-    0.92      13.2 +/-    0.92  0.030 / 0.030
G08     44.7           30.8                9.2 +/-    1.02      15.8 +/-    1.02  0.030 / 0.040
G09     177.6          27.1               11.6 +/-    1.12      21.6 +/-    1.12  0.030 / 0.040
G11     104.8          40.7               13.2 +/-    0.68      19.0 +/-    0.68  0.060 / 0.070
G13     317.2          20.5                9.3 +/-    3.07      20.2 +/-    3.07  0.120 / 0.060
G17     201.0          25.0               14.1 +/-    1.86      27.5 +/-    1.86  0.090 / 0.230
G18     91.8           20.8               12.3 +/-    1.06      26.7 +/-    1.06  0.110 / 0.240
G28     286.4          54.5               12.5 +/-    2.13      15.0 +/-    2.13  0.160 / 0.380
G30     351.5          70.4               11.2 +/-    0.64      11.8 +/-    0.64  0.120 / 0.320