PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-20:58:00
G01     61.9           30.9               11.0 +/-    1.42      18.9 +/-    1.42  0.090 / 0.230
G07     140.6          18.6               12.3 +/-    2.09      28.0 +/-    2.09  0.110 / 0.150
G11     48.5           24.6               10.7 +/-    2.17      21.1 +/-    2.17  0.040 / 0.050
G13     264.2          36.6               13.3 +/-    1.82      20.4 +/-    1.82  0.030 / 0.060
G15     295.0          16.5                9.0 +/-    2.45      21.5 +/-    2.45  0.070 / 0.120
G17     251.8          76.0               13.5 +/-    0.63      13.9 +/-    0.63  0.090 / 0.140
G18     42.1           12.6                9.9 +/-    1.98      26.1 +/-    1.98  0.090 / 0.090
G19     229.8          49.0               13.4 +/-    2.70      17.2 +/-    2.70  0.070 / 0.080
G28     24.5           59.2               10.7 +/-    0.96      12.3 +/-    0.96  0.040 / 0.040
G30     142.0          53.0               13.1 +/-    0.29      15.9 +/-    0.29  0.040 / 0.050