PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-16:28:00
G07     346.8          62.5                9.4 +/-    0.51      10.4 +/-    0.51  0.030 / 0.040
G08     86.4           53.6               10.7 +/-    0.67      13.0 +/-    0.67  0.030 / 0.050
G09     183.6          63.8               12.8 +/-    0.70      14.1 +/-    0.70  0.030 / 0.040
G11     140.5          18.8               12.7 +/-    2.26      28.8 +/-    2.26  0.030 / 0.060
G23     156.6          28.2               12.2 +/-    1.82      22.3 +/-    1.82  0.070 / 0.090
G27     47.4           26.1               10.0 +/-    1.43      19.0 +/-    1.43  0.080 / 0.080
G28     245.3          36.7               13.9 +/-    2.13      21.4 +/-    2.13  0.060 / 0.130
G30     309.8          41.9                8.9 +/-    1.43      12.6 +/-    1.43  0.070 / 0.100