PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-23:12:40
G02     260.4          79.7               10.6 +/-    0.58      10.8 +/-    0.58  0.030 / 0.040
G05     169.1          21.0               16.2 +/-    1.99      34.8 +/-    1.99  0.030 / 0.030
G06     40.1           52.9               10.8 +/-    0.57      13.1 +/-    0.57  0.110 / 0.170
G12     321.3          57.5               10.6 +/-    0.65      12.3 +/-    0.65  0.100 / 0.180
G17     73.5           22.0                9.5 +/-    2.43      19.9 +/-    2.43  0.100 / 0.170
G19     60.7           37.1                9.9 +/-    1.10      15.1 +/-    1.10  0.080 / 0.160
G24     240.2          32.0               12.8 +/-    1.71      21.5 +/-    1.71  0.190 / 0.340
G25     317.4          15.7                7.3 +/-    1.43      17.9 +/-    1.43  0.260 / 0.240