PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-21:42:40
G02     205.6          42.8               12.2 +/-    1.18      16.9 +/-    1.18  0.060 / 0.110
G06     150.6          75.1               12.6 +/-    0.91      13.0 +/-    0.91  0.070 / 0.140
G12     310.2          18.7                9.7 +/-    2.20      21.9 +/-    2.20  0.050 / 0.080
G17     42.6           43.7                9.6 +/-    1.40      13.2 +/-    1.40  0.060 / 0.070
G19     16.0           60.4               10.3 +/-    0.92      11.7 +/-    0.92  0.080 / 0.170
G24     288.0          41.3                4.3 +/-    2.13       6.1 +/-    2.13  0.140 / 0.210
G28     107.1          30.3               11.8 +/-    1.12      20.5 +/-    1.12  0.030 / 0.030