PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-19:28:10
G02     219.8          63.4               11.3 +/-    1.10      12.5 +/-    1.10  0.170 / 0.310
G06     50.9           71.7               10.1 +/-    0.44      10.6 +/-    0.44  0.140 / 0.380
G12     318.6          37.3               11.2 +/-    2.27      17.0 +/-    2.27  0.050 / 0.050
G17     59.0           31.3                7.2 +/-    2.11      12.3 +/-    2.11  0.050 / 0.050
G19     44.1           45.9               10.4 +/-    0.75      13.9 +/-    0.75  0.110 / 0.110
G24     260.4          40.4               12.5 +/-    4.12      18.0 +/-    4.12  0.070 / 0.090
G28     123.5          15.8               11.6 +/-    1.84      28.4 +/-    1.84  0.050 / 0.090