PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-22:28:00
G10     245.7          22.6               14.6 +/-    2.35      30.2 +/-    2.35  0.030 / 0.040
G13     59.2           32.7                9.3 +/-    1.65      15.4 +/-    1.65  0.030 / 0.050
G15     105.3          58.7               11.2 +/-    0.71      12.9 +/-    0.71  0.150 / 0.400
G16     299.9          16.1                8.7 +/-    1.90      21.0 +/-    1.90  0.180 / 0.440
G20     250.3          17.2               13.4 +/-    4.02      31.5 +/-    4.02  0.070 / 0.120
G21     325.6          55.3                9.4 +/-    0.64      11.1 +/-    0.64  0.060 / 0.130
G26     271.9          17.9               11.7 +/-    0.88      27.2 +/-    0.88  0.030 / 0.030
G29     163.4          58.0               11.4 +/-    0.37      13.2 +/-    0.37  0.030 / 0.030