PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-20:12:50
G01     97.7           29.2               14.4 +/-    1.11      25.7 +/-    1.11  0.080 / 0.130
G07     119.9          45.6               15.7 +/-    0.78      20.9 +/-    0.78  0.150 / 0.140
G08     41.6           12.4               10.3 +/-    1.28      27.2 +/-    1.28  0.040 / 0.050
G11     75.5           41.8               12.5 +/-    2.14      17.7 +/-    2.14  0.040 / 0.050
G13     301.7          34.1               13.0 +/-    1.36      21.1 +/-    1.36  0.040 / 0.050
G17     208.8          47.4               15.9 +/-    0.73      20.7 +/-    0.73  0.050 / 0.040
G18     68.7           23.8               12.0 +/-    1.33      24.1 +/-    1.33  0.060 / 0.110
G19     211.1          20.7               15.8 +/-    2.73      34.1 +/-    2.73  0.050 / 0.140
G28     325.7          61.0               12.4 +/-    0.78      13.9 +/-    0.78  0.020 / 0.020
G30     77.4           78.8               14.7 +/-    0.53      14.9 +/-    0.53  0.030 / 0.020