PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-18:58:10
G07     10.2           67.5               11.4 +/-    0.63      12.3 +/-    0.63  0.070 / 0.150
G08     69.8           51.9               12.5 +/-    0.62      15.4 +/-    0.62  0.070 / 0.140
G09     180.9          52.1               12.1 +/-    1.32      14.9 +/-    1.32  0.090 / 0.330
G11     133.2          25.9               14.2 +/-    1.00      27.2 +/-    1.00  0.080 / 0.280
G23     158.4          17.1               13.2 +/-    3.56      31.1 +/-    3.56  0.050 / 0.130
G27     41.0           18.0                9.3 +/-    1.11      21.5 +/-    1.11  0.050 / 0.120
G28     257.3          44.7               10.8 +/-    1.09      14.6 +/-    1.09  0.030 / 0.030
G30     320.4          50.8               11.3 +/-    0.81      14.1 +/-    0.81  0.030 / 0.050