PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-18:58:10
G01     119.6          16.9               12.7 +/-    2.97      30.2 +/-    2.97  0.030 / 0.040
G07     87.4           62.0               10.8 +/-    0.83      12.1 +/-    0.83  0.030 / 0.040
G08     45.1           31.7                8.8 +/-    2.27      14.9 +/-    2.27  0.080 / 0.120
G09     177.8          28.4               11.7 +/-    0.89      21.3 +/-    0.89  0.100 / 0.100
G11     106.5          40.1               11.5 +/-    0.53      16.8 +/-    0.53  0.100 / 0.070
G13     317.9          19.3                8.5 +/-    1.86      19.0 +/-    1.86  0.110 / 0.080
G17     200.6          24.0               11.7 +/-    2.48      23.5 +/-    2.48  0.090 / 0.230
G18     93.0           20.2                9.2 +/-    2.39      20.1 +/-    2.39  0.090 / 0.260
G28     284.4          54.0               11.2 +/-    3.34      13.5 +/-    3.34  0.030 / 0.030
G30     347.7          69.0               10.1 +/-    0.91      10.7 +/-    0.91  0.030 / 0.020