PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-23:12:30
G02     260.4          79.7               10.5 +/-    0.45      10.7 +/-    0.45  0.110 / 0.130
G05     169.1          21.0               16.6 +/-    0.90      35.7 +/-    0.90  0.100 / 0.110
G06     40.1           52.9                9.9 +/-    0.51      12.1 +/-    0.51  0.040 / 0.040
G12     321.3          57.5               10.8 +/-    1.47      12.5 +/-    1.47  0.040 / 0.040
G17     73.5           22.0                8.6 +/-    1.64      18.0 +/-    1.64  0.050 / 0.160
G19     60.7           37.1               10.1 +/-    1.30      15.5 +/-    1.30  0.050 / 0.150
G24     240.2          32.0               16.6 +/-    2.29      27.9 +/-    2.29  0.030 / 0.040
G25     317.4          15.7                7.5 +/-    3.26      18.4 +/-    3.26  0.030 / 0.040