PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-22:27:30
G02     205.5          42.9               16.4 +/-    1.37      22.8 +/-    1.37  0.050 / 0.070
G06     152.6          74.9               14.6 +/-    0.84      15.0 +/-    0.84  0.050 / 0.080
G12     310.2          18.6               11.1 +/-    1.55      25.2 +/-    1.55  0.030 / 0.030
G17     42.8           43.3               11.7 +/-    0.64      16.1 +/-    0.64  0.030 / 0.030
G19     15.7           60.5               12.3 +/-    1.04      13.9 +/-    1.04  0.070 / 0.140
G24     287.8          41.5               12.1 +/-    1.67      17.2 +/-    1.67  0.060 / 0.150
G28     107.2          30.1               14.7 +/-    0.56      25.6 +/-    0.56  0.040 / 0.080