PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-14:57:30
G07     303.9          44.7               11.5 +/-    1.82      15.5 +/-    1.82  0.050 / 0.080
G08     132.7          38.5               13.2 +/-    0.56      19.7 +/-    0.56  0.050 / 0.060
G09     309.0          76.8               11.3 +/-    0.79      11.5 +/-    0.79  0.110 / 0.070
G16     41.8           24.6                9.1 +/-    1.63      17.9 +/-    1.63  0.110 / 0.080
G23     141.2          61.8               12.5 +/-    0.35      14.0 +/-    0.35  0.140 / 0.370
G27     82.0           37.1               10.9 +/-    1.02      16.7 +/-    1.02  0.170 / 0.270
G30     284.3          21.1               11.7 +/-    3.31      25.1 +/-    3.31  0.030 / 0.040