PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-17:57:40
G03     199.8          47.1               13.9 +/-    0.98      18.2 +/-    0.98  0.200 / 0.240
G07     263.6          20.0               13.6 +/-    1.22      29.9 +/-    1.22  0.170 / 0.230
G09     313.9          34.2               10.3 +/-    0.64      16.7 +/-    0.64  0.070 / 0.100
G16     73.3           62.6               14.0 +/-    0.56      15.6 +/-    0.56  0.080 / 0.110
G22     183.5          31.1               12.7 +/-    1.51      21.8 +/-    1.51  0.040 / 0.030
G23     344.2          69.5               13.0 +/-    0.32      13.8 +/-    0.32  0.040 / 0.040
G27     127.1          16.6               15.8 +/-    1.93      37.9 +/-    1.93  0.030 / 0.040