PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-22:57:40
G02     203.7          37.8               13.8 +/-    1.65      20.8 +/-    1.65  0.120 / 0.110
G06     163.3          69.5               11.9 +/-    0.92      12.7 +/-    0.92  0.100 / 0.080
G12     307.6          14.8                8.3 +/-    3.20      20.7 +/-    3.20  0.040 / 0.040
G17     38.8           46.6               10.2 +/-    1.93      13.4 +/-    1.93  0.050 / 0.030
G19     6.5            63.7               10.1 +/-    0.99      11.1 +/-    0.99  0.090 / 0.130
G24     293.7          39.9               10.9 +/-   11.23      15.8 +/-   11.23  0.090 / 0.130
G28     102.6          33.3               12.6 +/-    1.09      20.7 +/-    1.09  0.160 / 0.260