PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-17:27:50
G01     119.8          16.6               12.4 +/-    1.29      29.8 +/-    1.29  0.040 / 0.080
G07     87.0           62.0               11.0 +/-    0.58      12.3 +/-    0.58  0.040 / 0.070
G08     45.6           32.7                8.5 +/-    0.63      14.2 +/-    0.63  0.040 / 0.090
G09     177.9          29.0               11.4 +/-    2.79      20.3 +/-    2.79  0.040 / 0.100
G11     107.3          40.0               12.5 +/-    0.57      18.2 +/-    0.57  0.090 / 0.180
G13     318.0          19.1               10.5 +/-    1.69      23.7 +/-    1.69  0.080 / 0.150
G17     200.7          22.9               11.6 +/-    1.29      23.9 +/-    1.29  0.090 / 0.240
G18     93.8           20.1               11.9 +/-    0.90      26.2 +/-    0.90  0.100 / 0.260
G28     283.2          53.5               11.2 +/-    0.97      13.6 +/-    0.97  0.140 / 0.330
G30     348.9          69.2               10.2 +/-    0.72      10.9 +/-    0.72  0.130 / 0.340