PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-16:28:00
G07     337.3          59.5               10.6 +/-    0.59      12.1 +/-    0.59  0.040 / 0.050
G08     96.9           53.2               11.9 +/-    0.44      14.5 +/-    0.44  0.040 / 0.050
G09     187.6          70.1               12.7 +/-    0.44      13.4 +/-    0.44  0.040 / 0.040
G11     144.4          15.1               12.6 +/-    2.96      31.3 +/-    2.96  0.030 / 0.040
G23     155.1          33.8               12.3 +/-    0.77      20.0 +/-    0.77  0.060 / 0.080
G27     51.7           29.6               10.9 +/-    1.15      19.2 +/-    1.15  0.070 / 0.070
G28     240.3          32.4               14.3 +/-    2.07      23.8 +/-    2.07  0.100 / 0.130
G30     305.2          38.0               11.1 +/-    1.35      16.7 +/-    1.35  0.080 / 0.170