PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-17:27:50
G01     49.4           25.0               10.7 +/-    0.67      21.0 +/-    0.67  0.070 / 0.310
G06     176.5          27.2               13.0 +/-    1.09      24.2 +/-    1.09  0.080 / 0.250
G07     146.6          11.9               13.3 +/-    2.40      35.7 +/-    2.40  0.040 / 0.080
G11     44.4           14.3                9.9 +/-    3.06      25.0 +/-    3.06  0.050 / 0.070
G13     249.5          29.9               12.6 +/-    0.63      22.2 +/-    0.63  0.070 / 0.150
G15     284.7          15.0               10.7 +/-    2.11      26.7 +/-    2.11  0.060 / 0.120
G17     313.2          78.2               12.5 +/-    0.58      12.7 +/-    0.58  0.040 / 0.070
G19     246.5          58.1               14.1 +/-    0.72      16.3 +/-    0.72  0.040 / 0.060
G28     53.8           52.6               11.5 +/-    0.35      14.1 +/-    0.35  0.040 / 0.030
G30     150.3          40.8               13.6 +/-    0.96      19.6 +/-    0.96  0.040 / 0.030