PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-20:27:50
G01     59.8           30.5               12.8 +/-    0.67      22.2 +/-    0.67  0.090 / 0.360
G07     142.5          22.4               16.9 +/-    0.83      35.1 +/-    0.83  0.090 / 0.350
G11     48.6           24.4               11.7 +/-    0.77      23.1 +/-    0.77  0.060 / 0.080
G13     262.4          35.1               15.1 +/-    0.89      24.0 +/-    0.89  0.060 / 0.110
G15     293.9          16.3                9.6 +/-    1.58      23.2 +/-    1.58  0.080 / 0.230
G17     253.4          73.2               15.9 +/-    0.61      16.5 +/-    0.61  0.070 / 0.180
G18     42.4           13.0               10.2 +/-    1.25      26.5 +/-    1.25  0.030 / 0.070
G19     232.8          49.7               15.5 +/-    0.49      19.7 +/-    0.49  0.040 / 0.060
G28     36.7           56.5               13.4 +/-    0.68      15.7 +/-    0.68  0.080 / 0.250
G30     143.7          50.9               16.0 +/-    0.90      20.0 +/-    0.90  0.100 / 0.270