PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-20:27:50
G01     88.9           32.2               12.7 +/-    1.20      21.4 +/-    1.20  0.050 / 0.120
G07     126.5          45.0               14.5 +/-    0.53      19.6 +/-    0.53  0.070 / 0.140
G08     42.8           9.7                 8.0 +/-    2.88      22.5 +/-    2.88  0.120 / 0.430
G11     68.8           40.2               12.6 +/-    1.26      18.2 +/-    1.26  0.090 / 0.380
G13     293.5          36.1               13.8 +/-    4.18      21.4 +/-    4.18  0.090 / 0.100
G17     216.2          50.3               14.6 +/-    1.13      18.3 +/-    1.13  0.120 / 0.100
G18     63.1           23.9               10.5 +/-    1.56      21.0 +/-    1.56  0.050 / 0.050
G19     215.3          27.2               15.6 +/-    2.31      29.0 +/-    2.31  0.060 / 0.050
G28     352.2          61.6               11.5 +/-    0.46      12.8 +/-    0.46  0.030 / 0.030
G30     110.0          73.7               13.6 +/-    0.97      14.1 +/-    0.97  0.030 / 0.030