PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-21:27:40
G02     203.7          36.9               15.9 +/-    1.21      24.4 +/-    1.21  0.150 / 0.160
G06     153.7          71.7               14.0 +/-    0.38      14.7 +/-    0.38  0.130 / 0.140
G12     308.9          17.5               12.4 +/-    1.93      29.1 +/-    1.93  0.080 / 0.100
G17     35.1           50.2               12.2 +/-    0.65      15.4 +/-    0.65  0.080 / 0.100
G19     1.4            64.9               11.6 +/-    0.53      12.7 +/-    0.53  0.030 / 0.020
G24     295.5          39.2               11.8 +/-    3.90      17.4 +/-    3.90  0.030 / 0.030
G28     104.4          29.8               13.6 +/-    1.37      23.9 +/-    1.37  0.030 / 0.030