PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-23:12:30
G02     212.5          56.5               18.6 +/-    1.24      21.8 +/-    1.24  0.050 / 0.100
G06     84.0           80.1               14.7 +/-    0.48      14.9 +/-    0.48  0.060 / 0.100
G12     315.9          29.5               12.9 +/-    1.40      22.9 +/-    1.40  0.050 / 0.080
G17     53.8           34.5               13.0 +/-    0.39      20.9 +/-    0.39  0.060 / 0.080
G19     34.0           51.8               13.9 +/-    0.62      17.1 +/-    0.62  0.070 / 0.180
G24     269.8          42.5               16.2 +/-    1.02      22.7 +/-    1.02  0.080 / 0.190
G28     118.1          20.8               17.6 +/-    0.92      38.0 +/-    0.92  0.030 / 0.030