PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/05-16:42:50
G07     315.9          50.7               17.3 +/-    1.11      21.7 +/-    1.11  0.030 / 0.070
G08     122.4          46.1               19.0 +/-    0.96      25.2 +/-    0.96  0.030 / 0.070
G09     251.5          82.9               17.5 +/-    0.58      17.6 +/-    0.58  0.040 / 0.040
G16     43.5           15.7               11.2 +/-    1.79      27.4 +/-    1.79  0.030 / 0.030
G23     148.5          49.4               17.8 +/-    0.96      22.7 +/-    0.96  0.050 / 0.070
G27     68.1           36.1               15.2 +/-    0.68      23.6 +/-    0.68  0.040 / 0.060
G28     228.8          19.8               17.5 +/-    2.33      38.7 +/-    2.33  0.200 / 0.360
G30     292.9          28.1               15.4 +/-    1.26      28.1 +/-    1.26  0.080 / 0.270