PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-19:27:50
G01     66.0           31.9               13.2 +/-    1.71      22.2 +/-    1.71  0.060 / 0.050
G07     138.8          21.5               14.3 +/-    3.05      30.4 +/-    3.05  0.070 / 0.050
G11     50.5           27.6               11.0 +/-    2.05      20.2 +/-    2.05  0.070 / 0.110
G13     268.9          37.7               13.4 +/-    4.33      20.2 +/-    4.33  0.080 / 0.110
G15     298.5          16.2               11.0 +/-    2.16      26.5 +/-    2.16  0.040 / 0.040
G17     239.7          72.4               15.2 +/-    0.68      15.8 +/-    0.68  0.040 / 0.030
G18     44.8           15.1               11.3 +/-    2.27      28.0 +/-    2.27  0.140 / 0.380
G19     226.3          45.8               14.7 +/-    2.56      19.5 +/-    2.56  0.170 / 0.260
G28     16.9           60.1               13.6 +/-    1.03      15.4 +/-    1.03  0.090 / 0.110
G30     138.9          55.9               14.3 +/-    0.88      16.9 +/-    0.88  0.070 / 0.130