PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-18:12:30
G07     13.8           68.0                9.4 +/-    0.71      10.0 +/-    0.71  0.040 / 0.060
G08     66.8           50.8               11.5 +/-    0.61      14.4 +/-    0.61  0.040 / 0.050
G09     180.4          50.3               13.4 +/-    1.80      16.8 +/-    1.80  0.130 / 0.220
G11     131.7          26.9               13.5 +/-    0.86      25.2 +/-    0.86  0.120 / 0.300
G23     158.3          15.2               13.5 +/-    1.42      33.5 +/-    1.42  0.030 / 0.050
G27     40.4           17.0                8.0 +/-    0.98      18.9 +/-    0.98  0.030 / 0.050
G28     259.0          45.6               11.5 +/-    1.02      15.4 +/-    1.02  0.090 / 0.210
G30     321.4          51.5               11.0 +/-    0.94      13.6 +/-    0.94  0.100 / 0.170