PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-20:42:50
G02     200.0          20.7               17.3 +/-    1.89      37.5 +/-    1.89  0.060 / 0.090
G06     172.7          51.9               11.5 +/-    0.70      14.2 +/-    0.70  0.060 / 0.080
G13     226.4          13.5               18.0 +/-    2.53      46.4 +/-    2.53  0.080 / 0.140
G17     21.6           60.0               10.1 +/-    0.36      11.5 +/-    0.36  0.090 / 0.130
G19     323.2          71.3                9.9 +/-    1.10      10.4 +/-    1.10  0.090 / 0.210
G24     309.6          29.9                7.7 +/-    2.29      13.4 +/-    2.29  0.080 / 0.150
G28     84.0           43.7               10.6 +/-    0.94      14.5 +/-    0.94  0.040 / 0.040
G30     156.3          12.7               13.7 +/-    1.91      35.8 +/-    1.91  0.070 / 0.050