PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-17:43:10
G07     252.9          11.5                1.7 +/-   26.20       4.6 +/-   26.20  0.150 / 0.310
G09     307.4          23.0               12.7 +/-    2.10      26.1 +/-    2.10  0.210 / 0.310
G14     105.2          11.4               13.6 +/-    2.64      36.8 +/-    2.64  0.070 / 0.160
G16     109.0          63.5               14.9 +/-    0.67      16.5 +/-    0.67  0.070 / 0.150
G22     187.8          45.4               15.6 +/-    0.91      20.9 +/-    0.91  0.100 / 0.130
G23     328.2          57.6               12.8 +/-    0.36      14.9 +/-    0.36  0.080 / 0.110
G26     57.9           46.2               11.9 +/-    1.12      15.8 +/-    1.12  0.050 / 0.060
G31     56.7           12.8               10.4 +/-    1.85      27.3 +/-    1.85  0.060 / 0.060