PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-19:57:30
G02     28.2           58.7                8.3 +/-    0.71       9.5 +/-    0.71  0.050 / 0.050
G05     144.1          59.2               11.4 +/-    0.46      13.0 +/-    0.46  0.060 / 0.050
G06     51.6           18.1                7.1 +/-    1.70      16.4 +/-    1.70  0.140 / 0.270
G12     208.1          72.7                8.5 +/-    0.61       8.9 +/-    0.61  0.130 / 0.260
G19     97.4           10.3                9.1 +/-    1.85      25.4 +/-    1.85  0.030 / 0.030
G29     305.1          26.2                9.9 +/-    1.43      18.8 +/-    1.43  0.030 / 0.040