PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-22:43:00
G02     202.2          32.7               12.2 +/-    2.32      20.2 +/-    2.32  0.150 / 0.370
G06     168.2          64.1               12.2 +/-    1.03      13.4 +/-    1.03  0.120 / 0.280
G12     304.9          11.1                1.7 +/-   22.80       4.7 +/-   22.80  0.060 / 0.080
G17     34.3           50.3                9.8 +/-    0.40      12.3 +/-    0.40  0.070 / 0.090
G19     355.9          66.6                9.2 +/-    0.77       9.9 +/-    0.77  0.050 / 0.120
G24     299.3          37.6               10.4 +/-    1.69      15.7 +/-    1.69  0.050 / 0.130
G28     97.5           36.5               10.7 +/-    0.52      16.5 +/-    0.52  0.030 / 0.040