PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-21:43:10
G01     40.6           15.5               10.9 +/-    0.92      26.6 +/-    0.92  0.140 / 0.390
G06     174.1          41.0               18.7 +/-    1.24      26.7 +/-    1.24  0.130 / 0.400
G13     236.9          21.2               18.9 +/-    1.59      40.4 +/-    1.59  0.130 / 0.330
G15     270.0          11.8               17.5 +/-    2.79      46.9 +/-    2.79  0.110 / 0.260
G17     353.3          71.6               15.0 +/-    0.29      15.8 +/-    0.29  0.150 / 0.290
G19     278.7          68.7               14.8 +/-    0.54      15.7 +/-    0.54  0.140 / 0.400
G24     316.1          20.3               12.9 +/-    1.90      28.2 +/-    1.90  0.050 / 0.080
G28     73.6           46.0               13.9 +/-    1.41      18.4 +/-    1.41  0.050 / 0.080
G30     154.6          25.2               17.8 +/-    1.10      34.5 +/-    1.10  0.060 / 0.150