PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-01:57:30
G02     32.3           55.8                6.0 +/-    1.16       7.1 +/-    1.16  0.030 / 0.020
G05     139.4          61.1                6.9 +/-    0.63       7.7 +/-    0.63  0.030 / 0.030
G06     51.6           19.7                5.9 +/-    1.43      13.1 +/-    1.43  0.030 / 0.030
G12     208.5          71.6                7.4 +/-    0.69       7.8 +/-    0.69  0.030 / 0.030
G19     98.5           10.3                7.1 +/-    2.97      19.8 +/-    2.97  0.200 / 0.290
G25     298.5          53.1                6.3 +/-    1.84       7.6 +/-    1.84  0.170 / 0.280
G29     308.1          30.5                6.5 +/-    1.75      11.3 +/-    1.75  0.040 / 0.050