PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-16:13:10
G02     203.5          30.7               15.6 +/-    3.21      26.9 +/-    3.21  0.050 / 0.080
G06     161.8          67.6               11.3 +/-    1.09      12.1 +/-    1.09  0.050 / 0.100
G12     307.3          14.7                7.4 +/-    2.11      18.5 +/-    2.11  0.130 / 0.250
G17     37.5           48.0                9.1 +/-    0.89      11.7 +/-    0.89  0.110 / 0.320
G19     3.9            65.0               10.0 +/-    0.49      10.9 +/-    0.49  0.030 / 0.050
G24     301.2          36.2                9.2 +/-    1.53      14.2 +/-    1.53  0.040 / 0.040
G28     101.7          31.7               10.5 +/-    0.68      17.7 +/-    0.68  0.030 / 0.040