PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-22:42:30
G02     202.2          32.7               13.0 +/-    1.23      21.6 +/-    1.23  0.150 / 0.090
G06     168.2          64.1               12.7 +/-    0.49      14.0 +/-    0.49  0.110 / 0.110
G12     304.9          11.1               -3.2 +/-   19.40      -8.8 +/-   19.40  0.140 / 0.210
G17     34.3           50.3               11.1 +/-    1.23      14.0 +/-    1.23  0.100 / 0.240
G19     355.9          66.6               10.5 +/-    0.94      11.3 +/-    0.94  0.050 / 0.030
G24     299.3          37.6               10.2 +/-    2.05      15.5 +/-    2.05  0.040 / 0.030
G28     97.5           36.5               11.9 +/-    0.62      18.4 +/-    0.62  0.050 / 0.090