PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-23:57:40
G02     217.0          62.3               13.3 +/-    1.20      14.8 +/-    1.20  0.080 / 0.070
G06     59.5           76.8               10.9 +/-    0.55      11.2 +/-    0.55  0.070 / 0.070
G12     317.8          34.4                7.9 +/-    1.57      12.7 +/-    1.57  0.080 / 0.100
G17     58.6           30.7                8.8 +/-    1.03      15.2 +/-    1.03  0.080 / 0.110
G19     40.6           48.2               10.2 +/-    0.71      13.2 +/-    0.71  0.070 / 0.050
G24     261.9          41.4               12.0 +/-    2.17      17.1 +/-    2.17  0.060 / 0.060
G28     122.2          16.6               12.2 +/-    1.94      29.2 +/-    1.94  0.110 / 0.260