PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-14:42:50
G02     222.4          62.5                7.5 +/-    1.04       8.3 +/-    1.04  0.060 / 0.110
G06     47.1           68.1                7.7 +/-    0.41       8.2 +/-    0.41  0.060 / 0.090
G12     319.7          41.4                6.5 +/-    0.68       9.2 +/-    0.68  0.060 / 0.090
G17     60.0           31.0                8.0 +/-    0.73      13.7 +/-    0.73  0.040 / 0.090
G19     47.0           43.9                6.6 +/-    1.02       9.1 +/-    1.02  0.050 / 0.050
G24     259.1          39.5                7.5 +/-    2.02      11.0 +/-    2.02  0.050 / 0.060
G28     124.6          15.4                8.4 +/-    3.58      20.7 +/-    3.58  0.030 / 0.030