PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-21:13:00
G06     176.4          30.2               17.2 +/-    6.73      30.0 +/-    6.73  0.210 / 0.410
G11     44.1           12.3                9.8 +/-   13.03      26.0 +/-   13.03  0.140 / 0.430
G13     246.2          27.8               14.0 +/-    4.66      25.6 +/-    4.66  0.060 / 0.090
G17     317.8          76.9               12.3 +/-    5.66      12.6 +/-    5.66  0.060 / 0.130
G19     254.0          62.3               11.3 +/-    5.24      12.6 +/-    5.24  0.040 / 0.070
G28     59.6           50.8               13.1 +/-    5.89      16.4 +/-    5.89  0.040 / 0.080
G30     151.4          35.6               15.3 +/-    5.45      24.0 +/-    5.45  0.080 / 0.170