PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-21:57:30
G02     205.1          41.5               15.8 +/-    1.06      22.4 +/-    1.06  0.050 / 0.050
G06     142.8          75.5               15.1 +/-    0.72      15.6 +/-    0.72  0.040 / 0.050
G12     311.1          20.7               12.0 +/-    2.82      25.9 +/-    2.82  0.050 / 0.080
G17     39.0           47.3               11.8 +/-    0.45      15.4 +/-    0.45  0.040 / 0.070
G19     10.3           62.3               12.1 +/-    0.43      13.4 +/-    0.43  0.060 / 0.100
G24     290.4          40.8               11.6 +/-    0.69      16.6 +/-    0.69  0.060 / 0.110
G28     108.4          26.8               15.1 +/-    2.25      28.3 +/-    2.25  0.120 / 0.260