PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-23:28:10
G02     215.3          60.2               14.6 +/-    0.51      16.5 +/-    0.51  0.050 / 0.110
G06     66.2           78.1               11.3 +/-    0.61      11.5 +/-    0.61  0.060 / 0.090
G12     317.2          32.6               10.9 +/-    0.92      18.2 +/-    0.92  0.060 / 0.080
G17     56.8           32.1                9.6 +/-    0.33      16.1 +/-    0.33  0.070 / 0.090
G19     38.3           49.5               10.4 +/-    0.58      13.2 +/-    0.58  0.150 / 0.280
G24     264.8          41.9               13.1 +/-    0.90      18.4 +/-    0.90  0.130 / 0.420
G28     120.7          18.2               14.4 +/-    2.02      33.2 +/-    2.02  0.030 / 0.040