PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-21:57:40
G02     202.3          32.6               20.2 +/-    1.02      33.6 +/-    1.02  0.060 / 0.080
G06     167.2          64.6               18.1 +/-    1.13      19.9 +/-    1.13  0.090 / 0.110
G12     304.9          11.1                1.0 +/-   23.39       2.7 +/-   23.39  0.050 / 0.120
G17     34.0           50.6               10.7 +/-    0.64      13.4 +/-    0.64  0.050 / 0.110
G19     356.4          66.6               11.7 +/-    0.72      12.6 +/-    0.72  0.070 / 0.150
G24     299.4          37.5               12.2 +/-    1.18      18.5 +/-    1.18  0.070 / 0.120
G28     97.4           36.6               12.5 +/-    0.92      19.3 +/-    0.92  0.140 / 0.410