PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-23:57:40
G02     221.0          66.1               11.7 +/-    1.51      12.6 +/-    1.51  0.070 / 0.090
G06     50.3           73.4                8.6 +/-    0.48       8.9 +/-    0.48  0.110 / 0.090
G12     318.9          37.9                9.7 +/-    1.69      14.6 +/-    1.69  0.060 / 0.070
G17     61.6           28.4                9.5 +/-    2.55      17.1 +/-    2.55  0.050 / 0.050
G19     44.8           45.7                9.8 +/-    1.46      13.1 +/-    1.46  0.120 / 0.280
G24     257.1          40.2               10.7 +/-    4.75      15.6 +/-    4.75  0.160 / 0.270
G28     124.6          13.7               13.2 +/-    1.73      33.8 +/-    1.73  0.060 / 0.080