PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-16:58:10
G07     4.4            66.5               11.8 +/-    0.47      12.8 +/-    0.47  0.030 / 0.050
G08     71.8           51.8               11.4 +/-    0.64      14.1 +/-    0.64  0.040 / 0.050
G09     180.8          54.3               13.4 +/-    2.81      16.1 +/-    2.81  0.040 / 0.060
G11     134.4          24.5               13.2 +/-    1.07      26.0 +/-    1.07  0.040 / 0.060
G23     158.1          19.6               11.7 +/-    1.14      26.1 +/-    1.14  0.050 / 0.130
G27     42.2           20.0               10.0 +/-    1.31      21.9 +/-    1.31  0.040 / 0.110
G28     254.3          42.9               15.6 +/-    1.43      21.7 +/-    1.43  0.030 / 0.040
G30     317.3          48.1               11.0 +/-    0.64      14.2 +/-    0.64  0.030 / 0.040